UNDERSTANDING
2-STROKE ENGINES

TIMESTAMP: 01:27 - Diagram explaining the Two Stroke Carburetor High Screw and Low Screw 02:00 - Showing the Two Stroke Carburetor Fuel Adjustment Screw Settings positioning to begin 02:27 - Where to set the Two Stroke Carburettor Adjustment Screws 'explained' 02:58 - How to position and set the Two Stroke Carburetor Idling Screw ('tick-over' screw) 'explained' 03:29 - How a Two Stroke Carburetor works and how the fuel adjustment screws work 04:34 - What is a Two Stroke Carburetor running Rich and Lean? Answered 05:01 - Carburetors 'H' screw adjusted out too much. Effects on the Engine 06:18 - Correct setting for the carburetors 'H' Screw. Effects in the Engine 07:00 - Carburetor 'H' screw adjusted in too much. Effects on the Engine 09:55 - Carburetor 'L' screw adjustment settings explained. 10:51 - carburetor 'L' screw adjusted out. Effects on the Engine I hope you find this video useful, and I really hope you enjoy it. Many thanks indeed Craig Kirkman (Owner and Creator of The Repair Specialist Channel and its Copyrighted diagrammatic content)

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. This unique video show you the working of a Chainsaw Carburetor with real chainsaw sound effects. This will give you a better understanding of what is going on inside the chainsaw when you hear specific tones from the chainsaws engine. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD For some FREE Printable Download help Leaflet on this topic: https://www.therepairspecialistonline.com/ These downloads are from my very own website and are absolutely Free. They consist of just a few help topics so far but I am continually making more of these Free Downloads. The best of them is that they are printable so you can take them into the workshop with you and study them at you own pace. You will also gain some useful tips on how to Tune a Chainsaw Carburetor. Anyone who has tried this for the first time can tell you that it's quite a daunting task. So the better you understanding, the less daunting and more enlightening it will become. So whether your chainsaw wont start or you just want to know how to tune a 2 stroke carburetor this video will help with that. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s How to tune a chainsaw video here: https://www.youtube.com/watch?v=74p9F... TIMELINE: 00:55 - How the Chainsaw Throttle Works 01:12 - H Tuning Adjuster Screw | How it works 01:14 - How to make a Chainsaw Carburetor Fuel/Air mix Rich 01:29 - How to make a Chainsaw Carburetor Fuel/Air mix Lean 01:30 - Chainsaw engine revving too high | Why? 01:50 - Why 'over revving' can damage your Chainsaw 02:22 - How to tune a Chainsaw Fuel/Air mix for idling 02:26 - How the 'L' (low) screw works 02:30 - What causes lumpy un-even idling on a Chainsaw 02:49 - Lumpy un-even idling | How to correct it 03:04 - Adjusting the 'L' Screw in too far | What happens? 03:44 - How to Adjust Chainsaw Idling Speed Anyone who has experience tuning chainsaws knows, whether it be a Stihl chainsaw, a Homelite chainsaw, Poulan, McCulloch, Jonesered or husqvarna chainsaw, that there are so many different types of adjustment screw heads on all of the different brands available. Some have screw driver heads and others have specialist tool requirements. Here I have included a great adjustment kit on Amazon, which will fit most chainsaws: https://amzn.to/39EbJg0 Thank you for viewing this video where i show you how I personally tune a chainsaw. Thus will help get your chainsaw running well again and prevent chainsaw "BOG" or "BOG Down" as some describe it. Please take this advice as demonstration purposes only. It is your very own decision whether or not to take this advice and any undertaking relating to this video, by you, must be done so in the correct safe manor as dictated by your safety user manual. Do not undertake any of the procedures shown in this video unless you are sure of your own safety as described by your safety manual. Although this video is focused on running Chainsaw running problems that can be rectified by adjusting the carburetor fuel adjuster screws, it can apply to mostly any 2 Stroke engine. That's because the two stroke engine fitted to most small garden machines are pretty much the same principally. Thank you Craig Kirkman, The Repair Specialist, on chainsaw carburetor adjustment Please visit our website: https://www.therepairspecialistonline.com/ Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. My Chainsaw was Bogging down when throttled and not Idling correctly. I Easily adjusted my Carburetor without any cost. You can to. HERE'S HOW I DID IT. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ These downloads are from my very own website and are absolutely Free. They consist of just a few help topics so far but I am continually making more of these Free Downloads. The best of them is that they are printable so you can take them into the workshop with you and study them at you own pace. Here I have some useful information for you if you need to tune the carburetor on your chainsaw. Anyone who has tried this for the first time can tell you that it's quite a daunting task. If you have tried this yourself I'm sure you will have thought, where are the adjustment screws exactly? Even if you know where they are you might then wonder, which screw do I adjust? If you know which screws to adjust then, which screw first? How much to I adjust them? Do I turn them inwards (clockwise) or outwards (anticlockwise). After trying to adjust these without any experience it can result in complete frustration. What I hear a lot is "my chainsaw wont start" This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s Key moments: 00:19 - Chainsaw Engine Bog down | How to correct it 00:46 - Engine Smoking Excessive and Wont Rev up | How to correct it 01:12 - Engine wont Rev up and will Stop when Idling | How to correct it 01:37 - Engine running un-even when Idling and Excessive smoke | How to correct it 02:04 - Chain turning when Idling | How to correct it Well, this easy to follow video will explain what you need to do. Anyone who has experience tuning chainsaws knows, whether it be a Stihl chainsaw, a Homelite chainsaw, Poulan, McCulloch, Jonesered or husqvarna chainsaw, that there are so many different types of adjustment screw heads on all of the different brands available. Some have screw driver heads and others have specialist tool requirements. Here I have included a great adjustment kit on Amazon, which will fit most chainsaws: https://amzn.to/39EbJg0 Thank you for viewing this video where i show you how I personally tune a chainsaw. Thus will help get your chainsaw running well again and prevent chainsaw "BOG" or "BOG Down" as some describe it. Some Chainsaw adjustments don't have the conventional screw driver shaped slots on the adjustment screws. Instead, they have splines and pack-man shaped adjustments and many more. Please take this advice as demonstration purposes only. It is your very own decision whether or not to take this advice and any undertaking relating to this video, by you, must be done so in the correct safe manor as dictated by your safety user manual. Do not undertake any of the procedures shown in this video unless you are sure of your own safety as described by your safety manual. Although this video is focused on running Chainsaw running problems that can be rectified by adjusting the carburetor fuel adjuster screws, it can apply to mostly any 2 Stroke engine. That's because the two stroke engine fitted to most small garden machines are pretty much the same principally. Thank you Craig Kirkman, The Repair Specialist, on chainsaw carburetor adjustment Please visit our website: https://www.therepairspecialistonline.com/ Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. This video effortlessly guides you through the gasoline fuel flow through the Two-Stroke Carburetor. To master carburetor repair and diagnosis, one must first know how a Carburettor works. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ These downloads are from my very own website and are absolutely Free. They consist of just a few help topics so far but I am continually making more of these Free Downloads. The best of them is that they are printable so you can take them into the workshop with you and study them at you own pace. TIMESTAMP: 00:35 - Fuel Pump Diaphragm Location in the Two Stroke Carburetor 01:00 - Fuel Pump Reservoir Location in the Two Stroke Carburetor 01:30 - Fuel Pump Valving System on a Two Stroke Carburetor 02:04 - Fuel Screen Filter Location 02:10 - Role of the Fuel Pump Gasket in a Two Stroke Carburetor 02:25 - Full Fuel Flow through the Carburetor the 2 Stroke Carburetor 03:15 - Metering Needle and Lever Location 03:26 - Fuel Pump Diaphragm Location and Function 03:38 - How the Metering System works on a Two Stroke Carburetor 06:33 - How the Fuel Air Mixture Adjuster Screws work 07:43 - How a Primer Bulb works on a Two Stroke Carburetor 09:01 - A Personal Thank you from Craig Kirkman This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s HOW TO UN-FLOOD YOUR CHAINSAW: https://www.youtube.com/watch?v=nFum1... QUALITY 2-STROKE OIL: https://www.amazon.co.uk/gp/product/B... QUALITY CARBURETOR CLEANING SPRAY: https://www.amazon.co.uk/gp/product/B... Why know these basic fundamentals of the 2-stroke carburettor? Well, lets put that into perspective. When you take your car in to the garage for repair work who do you want to be repairing it? A mechanic of course, but exactly what type? With what background? What experience? What qualifications? Well, the chances are that you will want your mechanic to have both work experience behind them as well as college classroom training where they have gained the fundamentals. Basically, you want them to know your engine inside out! So then, you know the importance of the type of theoretical knowledge explained in this video. The basics in this video will go a long way to educating yourself on the basic principles of both the four stroke engine and the 2 stroke engine. Whether you can't start your lawnmower, your chainsaw wont start, your enduro bike needs diagnostic checks, your two stroke engine in general, and so on, you will find it much easier to tackle these issues if you have a basic fundamental knowledge of how engines work. This is a chance to sit back and learn your first steps towards mechanics and engineering. Many thanks indeed Craig Kirkman (Owner and creator of The Repair Specialist channel and copyrighted diagrammatic content) Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. In this unique video, learn about how this type of Two-Stroke Carburetor Main-Jet works. These types of main jet can in many types of small engines such as a Chainsaw, Hedge Trimmer, Brush-cutter, Small Quad Bike, Scooter and Mini Pocket Bike. To master carburetor repair and diagnosis, one must know how a carburetor works. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s Diagrams in this video are Copyrighted to Craig Kirkman of The Repair Specialist! * Why does a 2 Stroke Engine only run on Choke? https://www.youtube.com/watch?v=6Un97-8JRHg * Two Stroke - Four Stroke Engine Comparison: https://www.youtube.com/watch?v=ZjadL2Iit_I&t=509s How does an Emulsion Tube work? What is it's purpose? : https://www.youtube.com/watch?v=IGPg51AtIEE&t=125s * I Correct Chainsaw Running Problems using the Fuel Screw Adjustment: https://www.youtube.com/watch?v=Eo6iUTjcQ8Q&t=32s * Chainsaw Carburetor | How it Functions: https://www.youtube.com/watch?v=kTly4BYvauM&t=90s * Un tangle your Chainsaw Chain easily | I show you here: https://www.youtube.com/watch?v=lpiyqSVSeu4 * Buying a Used Chainsaw | My advice: https://www.youtube.com/watch?v=jW66xLmNLxc * Got your Carburetor Fuel Screws Mixed Up? I show you some remedies: https://www.youtube.com/watch?v=L8smASBVupc * How Fuel Flows through the Chainsaw Carburetor: https://www.youtube.com/watch?v=NNYEsmtB_X8 * Limp Starter Cord on your Chainsaw? Here's why with solutions: https://www.youtube.com/watch?v=xIUeov9IFtA&t=171s * How to Tension a Chainsaw Chain Correctly: https://www.youtube.com/watch?v=V9RUt22UNEY&t=145s * How to order the Correct Chainsaw Chain Every time. I show you: https://www.youtube.com/watch?v=0JUrdd_ZNxs * How to Un-Flood your Chainsaw Quickly, with and without tools: https://www.youtube.com/watch?v=U9BURjo005U&t=120s * Chainsaw damage caused by Dirt in Fuel: https://www.youtube.com/watch?v=MBhINTKRUQk&t=6s * 2 Stroke fuel mix for engine longevity: https://www.youtube.com/watch?v=wDpVc15znJs&t=26s * How a Chainsaw Engine and Carburetor work together: https://www.youtube.com/watch?v=XPgaF-JBwco * Good Maintenance | How to Clean a Chainsaw: https://www.youtube.com/watch?v=YhvcvXUkwqI * Storing a Chainsaw | Good Practice: https://www.youtube.com/watch?v=CiJFACoH0rA&t=24s * How an Ultrasonic Cleaner actually cleans your carburetor: https://www.youtube.com/watch?v=M8F_jLhEJIQ&t=24s TIMESTAMP: 00:19 - What is the Two Stroke Carburetor Main Jet? 00:50 - Neoprene Rubber Valve inside the Main Jet 00:56 - Neoprene Rubber Valve Cap inside the Main Jet 01:12 - 2-Stroke Main Jet Components (cross sectional view) 01:23 - How the 2-Stroke Main Jet Works 02:07 - How the Main Jet works on the Induction Stroke 02:14 - How the Main Jet works at the end of the Induction Stroke 02:58 - How a Main Jet protects the 2-Stroke Carburetor during an Engine Blow-back 03:36 - Main Jet and fuel leakage 03:53 - How the Carburetor Metering System prevents gas fuel leakage into the 2-Stroke Carburetor 03:56 - How gas fuel is lost from the 2-Stroke Main Jet 05:01 - Main Jet Valve Damage by Carburetor Cleaning Spray and Ethanol in gas Fuel 05:18 - How the Main Jet Works Animation The more you learn about, carburetors and how they function, the easier you will find it to tackle carburetor diagnosis and repairs. This is a chance to sit back and increase your knowledge! Many thanks indeed Craig Kirkman (Owner and creator of The Repair Specialist channel and copyrighted diagrammatic content) Website: https://www.therepairspecialistonline.com/

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. In this situation, I show you, that you must find any possible differences you possibly can between the two Fuel Adjuster Screws (Different threads, different lengths, different thicknesses, different shape, different ends and so on). Then you need to check the carburetors fuel screw holes and try to match the screw with a particular hole that you think could accept one of the fuel screws. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ These downloads are from my very own website and are absolutely Free. They consist of just a few help topics so far but I am continually making more of these Free Downloads. The best of them is that they are printable so you can take them into the workshop with you and study them at you own pace. TIMESTAMP: 00:14 - I have mixed up my Two Stroke Carburetor Gas Fuel Screws | What do I do? 00:18 - Checking the Gas Fuel Screw hole on the 2-Stroke Carburetor 00:27 - Matching the Fuel Gas Screws to their correct hole | 2-Stroke Carburetor 00:47 - Some Gas Fuel Screws are very similar to each other | Two Stroke Carburetor 00:57 - Comparing each Gas Fuel Adjuster Screw for their correct Fuel Hole 01:24 - What to look for in the Carburetor Adjuster Screw Holes 02:39 - What to do if the Fuel Adjuster Screws are exactly the same, which Fuel Hole? For what ever your reason for stripping down and servicing your Two Stroke Carburetor, whether your chainsaw wont start, you need to tune your chainsaw or another 2-Stroke engine, or you just need to service your engine, knowing these little tips may well help you in your moment of need. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s The more you learn about carburetors and how they function, the easier you will find it to tackle carburetor diagnosis and repairs. This is a chance to sit back and increase your knowledge! Many thanks indeed Craig Kirkman (Owner and creator of The Repair Specialist channel) Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. This video uniquely explains how this type of Two-Stroke Carburetor works. This can fit a Chainsaw, Hedge Trimmer, Brush-cutter, Small Quad Bike, Scooter and Mini Pocket Bike. To master carburetor repair and diagnosis, one must know how a carburetor works. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ These downloads are from my very own website and are absolutely Free. They consist of just a few help topics so far but I am continually making more of these Free Downloads. The best of them is that they are printable so you can take them into the workshop with you and study them at you own pace. Diagrams in this video are Copyrighted to Craig Kirkman of The Repair Specialist! TIMESTAMP: 00:07 - Types of machines this 2-Stroke Carburetor fits 00:45 - Engines Sizes this 2 Stroke Carburetor fits 01:24 - Inside view of a Two Stroke Carburetor 01:34 - How a Fuel Gas Primer Bulb works in a Two Stroke carburetor 02:15 - Two Stroke Carburetor | How the Metering Diaphragm, Metering Lever & Metering Lever works 02:32 - Two Stroke Carburetor Diaphragm | How the valves work 03:43 - Two Stroke Carburetor | Location of the Screen Filter (Strainer Filter) 03:58 - Fuel Inlet pipe | Two Stroke Carburetor 07:09 - Two Stroke Carburetor Main Jet | Special one-way valve 08:40 - Fuel Flow through the 2-Stroke Carburetor 09:18 - Two Stroke Carburetor | How it works 09:29 - How the Throttle works on a Two Stroke carburetor 09:51 - Two Stroke carburetor Main Jet | Special Plunger 11:07 - Two Stroke Carburetor in its working 11:26 - How does air draw out fuel Gas from the main jet? Explained 11:46 - How the Main Jet operates the Metering Diaphragm on a 2-Stroke carburetor 13:04 - Fuel Gas Pump on a Two Stroke Carburetor | How it works 17:03 - Fuel flow created by the Fuel Pump in a Two Stroke carburetor 17:10 - Fuel Pump pressure relief system on a 2-Stroke Carburetor | How it works 18:00 - How the Fuel Adjustment Tuning Screws (Fuel Screws) work on a 2-Stroke Carburetor 19:55 - How the Idling Screw works on a Two Stroke Carburetor 20:58 - A Personal Thank you from Craig Kirkman This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s The more you learn about, carburetors and how they function, the easier you will find it to tackle carburetor diagnosis and repairs. This is a chance to sit back and increase your knowledge! Many thanks indeed Craig Kirkman (Owner and creator of The Repair Specialist channel and copyrighted diagrammatic content) Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. Here is a detailed and unique explanation of some common causes of Chainsaw Engine damage, helping you better diagnose, fix & Save Money. For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ Diagrams in this video are Copyrighted to Craig Kirkman of The Repair Specialist! Timestamp: 00:27 - Fuel/Oil Mix Ratio. How this can cause engine damage. 01:05 - Fuel/Oil Mix Ratio. How damage occurs using Detailed Moving Engine Animation. 02:07 - Engine Damage. Comparing a normal piston and a piston damage due to incorrect oil ratio. 02:43 - Prolong Engine Life. Ways to make your chainsaw engine last longer and work better. 03:52 - Fuel too Lean. How the 'Fuel to Air' ratio (from the Carburetor) can cause damage. 05:53 - Carb Adjustment Screws. How they can contribute to engine damage. 07:07 - Inlet Boot/Manifold. How damage in this can lead to engine failure. 08:22 - Barrel/Pot gasket. Damage that can occur to the engine if this gasket fails. 09:08 - Barrel/Pot Gasket leakage. Quick observation to diagnose any leakage. 10:02 - Main Crankshaft Seals. How leakage of these can cause Bog Down and engine failure. 10:28 - Contaminated Gas/Fuel. Here's how dirt in gasoline can cause engine damage. 11:11 - Contaminated Air. This is how insufficiently filtered air can caused engine failure. 12:09 - A personal Thank you from Craig Kirkman of The Repair Specialist. Showing some animation, in the video I cover the basics of the importance of quality two stroke oil, how mixing 2 stroke oil can be easier, what ratio/strength of oil is good for engine longevity, how to prevent scoring of the piston and barrel, how to make your chainsaw work well for many years, what is meant by Rich and Lean fueling and how this can effect engine longevity and why the air filter and fuel filter have their own important reasons for a healthy engine's existence. I have included a link here that a good premium two stroke oil on Amazon. I am not the seller and I do not know the seller, but I know that this type of oil is very good and will help keep your chainsaw in tip top condition for many years: https://www.amazon.co.uk/gp/product/B007TJKJ4C/ref=as_li_tl?ie=UTF8&tag=therepairsp02-21&camp=1634&creative=6738&linkCode=as2&creativeASIN=B007TJKJ4C&linkId=920067555858172559f10ff6130631f1 How chainsaw Engine and Carburetor work together. This is my own video and I recommend you take a look if you would like to gain further in-depth knowledge. It uses moving animations and is very easy to follow: https://www.youtube.com/watch?v=XPgaF-JBwco&t=112s Whether you have a husqvarna, craftsman, stihl, poulan, homelite or Mcculloch, to name a few, if your chainsaw won't start then this video will help give you the knowledge to better equip you to do deal with chainsaw staring problems and malfunction. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s I want to thank you and I hope the information here helped. Craig Kirkman (Creator and owner of the Repair Specialist Channel) #lawnmower​ #gardening​ #repairing​ #savingmoney​ #chainsaw #Chainsawrepair #oil #smallenginemachines #DIY #howthingswork Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. In this video uniquely explained video I show you why engines will sometimes only run on Choke. I will have to admit here though that the causes I have included in this video are not all the possible causes, because that would be too vast for this video even if I knew then all. Instead, what's included here is the type of causes I believe I have experienced myself. All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD Get your machine Running Great, Save Money and Maintain Good lasting Condition. Here is some Unique Detailed Knowledge to help you better diagnose & Fix your engine. For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline.com/ These downloads are from my very own website and are absolutely Free. They consist of just a few help topics so far but I am continually making more of these Free Downloads. Imagery in this video is Copyrighted! Timestamp: 0:29 - Engine Choke. How it works. 1:22 - Choke turned off. How the engine is working. 1:54 - Engine only runs on Choke. What causes this? 2:06 - Blocked Fuel Filter. How it causes engine failure. 3:20 - Fuel Tank Cap Breather. How it can fail causing engine problems. 5:00 - Simple Test. To see if Fuel Tank Breather failure is causing engine Bog down. 5:54 - Fuel Pipes. How they can cause engine failure. 7:37 - Fuel Blockage and how this effects the engine in detail. 8:56 - Carburetor Fixture and Fitting. Here's how a loose Carburetor causes engine failure. 12:14 - Carburetor Adjustment Screws. How the wrong setting can effects engine running. 15:04 - Metering Diaphragm Cap. Why this can cause engine Bog Down. 19:02 - Fuel Pump Diaphragm Cap. Why engine Bog Down can result from this. 19:53 - Fuel Pump Diaphragm. Here's how a defect in this can cause engine failure. 21:39 - Metering Diaphragm. This is how it can cause engine problems. 23:44 - A personal thank you to you. From Craig Kirkman of The Repair Specialist So I have included how fuel filter blockage can reduce fuel flow through the carburetor, how the fuel tank cap breather system fails and reduces fuel flow, how fuel line blockage cap disrupt flow through and why a loose carburetor can cause bog down. Also, why failing inlet manifolds, carburetor adjustment screws, fuel pump diaphragms (caps and gaskets) and metering diaphragms (caps and gaskets) can all cause an engine to only run on choke. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s How a 2-Stroke engine and carburetor work together:https://www.youtube.com/watch?v=XPgaF-JBwco&t=126s How a carburetor Venuri works: https://www.youtube.com/watch?v=M4WK9I-kbz4 How a 2-Stroke Carburetor works animated view: https://www.youtube.com/watch?v=tqfQ6B2_o_c How to Tune or Adjust a 2-Stroke Carburetor (using a chainsaw but principles are the same): https://www.youtube.com/watch?v=74p9FLmIkkw&t=17s Quality Carburetor Cleaner Spray: https://www.amazon.co.uk/gp/product/B007TL6MCI/ref=as_li_tl?ie=UTF8&tag=therepairsp02-21&camp=1634&creative=6738&linkCode=as2&creativeASIN=B007TL6MCI&linkId=2f003c8722c4af3af6e5bd63da740a59 Thank you very much indeed for visiting Craig Kirkman (owner and creator of the Repair Specialist Channel) Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. So if you are experiencing problems such as your Chainsaw Wont Start or any other conventional Two Stroke Engine for that matter, or you just want in increase your knowledge, then this channel will certainly help you along the way! All 2-Stroke Carburetor Episodes: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s MY MISSION My mission is to take subjects that can seem quite daunting and somewhat difficult to understand and explain them in such a way that everyone can understand and benefit. All too often things are explained to us in a way that is difficult to grasp. I really hope that all of my tutorials are understandable by most, if not all, people who wish to view them. I want to help people understand as I was helped by some fantastic mentors during my years as a University student, in Science, and a trainee apprentice as an engineer. In fact, I could NOT have became a qualified repair engineer, followed by a Science graduate and post graduate, followed by the creation of these videos, if I never had these wonderful people in my life. Sadly, some of them are no longer with us to see these videos, which I really want to dedicate to them. My very first manager (Mr Nadin), who gave me a chance straight out of school despite me not being the most ideal candidate for the position of engineers apprentices at the time. He believed he could make an engineer of me. So first of all, if it were not for him I wouldn't be here with all of this knowledge today. I will always respect him and remain grateful to him for what he did for me. I'm so pleased I achieved an apprentice of the year award in 1994 to give him back some satisfaction that I was working hard, and that his belief in me paid off. I also want to dedicate these to my Father, who is still a practicing engineer, for always pushing me into this field and ensuring I applied my mind to it. More than anyone else, I want to dedicate these to my amazing late mother, who nurtured, cared, loved and motivated me all of my life. When I was down she would always reach down and stand me back up again, telling me I was worth something. I only wish I could thank her in person and show her these videos. I realise now that she was my biggest and most amazing mentor. Thank you for 40 Golden years mom. I am always thinking of you! Finally, I want to give all of my love and gratitude to my incredible wife, the only woman I ever have, and ever will, truly love. She is my Rock! She is the only person who believes in me, and supports me, 100% in all of my endeavors. She believed in me from the moment we met, and saw some potential in me. She provided me with two amazing children, who have added a very challenging but completeness to our lives. This is basically a shortened version of the How a Carburetor Works. Again, this is the STIHL ZAMA Grass Strimmer Carburettor. I though it would be a good idea to include this version as some people may want to get right to the point and not need to know as much detail as others may. I hope this is helpful Many thanks indeed for watching Craig Kirkman #lawnmower​ #gardening​ #repairing​ #savingmoney​ #chainsaw #Chainsawrepair #oil #smallenginemachines #DIY #howthingswork

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems All 2-Stroke Carb Episodes Here: https://www.youtube.com/playlist?list=PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD FULL VIDEO HERE: https://www.youtube.com/watch?v=SshXK8Ehm74 For more useful information please take a look at my website: https://www.therepairspecialistonline.com/ Hi, It's Craig here. I'm very pleased you're here reading my description. An issue often overlooked when a 2 stroke engine fails, such as when a Chainsaw Won't Start, is the Pulse Line. Exclusive to the two stroke engine, the Pulse Line is responsible for carrying air pressures from the engine into the carburetor and operate the fuel pump diaphragm. If the pulse line is damaged (leaking) then the vital pressure cannot be carried to the fuel pump diaphragm resulting in the pump not working. The obvious effects of which is that no fuel can the carburetor's main jet to supply the engine. This results in engine failure. There is a lot more to this topic than what I have explained but I have covered the basics here. In my experience, some of the symptoms of pulse line damaged/leakage can be: -the engine will not start, -engine will start but not run correctly (loss of power, over revving, under revving, uneven running, carburettor will not adjust correctly, and many more) -engine will BOG down To get a full picture and understanding of these types of two stroke carburettors I recommend that you watch this video, which is 'how does a carburetor work' with it's Engine. This will help you identify certain issues relating to when machines fail, such as when a Chainsaw won't Start: https://www.youtube.com/watch?v=XPgaF-JBwco&t=320s Hopefully this information will give you an in depth foundation and help how to fix a carburetor. In addition this knowledge of how carburetor works will help carburetor cleaning process. So in order to be sure that pulse the line issues are not missed, first we need to know what a pulse line is along with it's function. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s So I hope you like this video and please do Like and Subscribe if you find it beneficial. Many thanks indeed Craig Kirkman (Owner and Creator of the 'The Repair Specialist' Channel) #lawnmower​ #gardening​ #repairing​ #savingmoney​ #chainsaw #Chainsawrepair #oil #smallenginemachines #DIY #howthingswork Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepairspecialist

* VISUALLY EXPLAINED by Craig Kirkman, a renowned you tube educator of these systems. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! If, by the way, you are having problems with your Chainsaw Not Starting, then please do take look at my other video, where I help you get back you and running again if your Chainsaw Won't Start, or your Chainsaw Won't Stay Running. https://www.youtube.com/watch?v=TM4twlv9VOg&t=9s If you need a easy to follow video on Chainsaw Carb Tuning. So here I take you step by step should the Chainsaw Carburetor Adjustment be required: https://www.youtube.com/watch? v=74p9FLmIkkw&t=47s Here is a detailed instructional presentation type video of mine explaining the meat and bones principle of why a Chainsaw Bogs Down: https://www.youtube.com/watch?v=SshXK8Ehm74&t=1982s Basically small garden type machinery use 2 stroke engines, although not in all cases, because they are smaller, cheaper, lighter and that they can be used in many different positions. Take a chainsaw, for example, they are used in so many different positions. One moment the engine could be facing upwards, then out on the side, and then facing downwards. The 2 cycle engine can be used in all of these positions, and work just as efficiently in any of them. The 4 stroke cycle engine is different in that it has an oil reservoir in their crankcase, which regents them from being tipped at angles. They also have more components, which makes them more expensive, heavier and larger in size. They are, however, more reliable, smoother running, heavier duty and quieter, to name a few reasons in their defence. I hope this helps explain things Many thanks indeed Craig Kirkman (Owner and Creator of the 'The Repair Specialist' Channel) #lawnmower​ #gardening​ #repairing​ #savingmoney​ #chainsaw #Chainsawrepair #oil #smallenginemachines #DIY #howthingswork