CARBURETOR TUNING: Chainsaw Carburetor Settings Explained! (by Craig Kirkman)

Chainsaw Carburetor Adjustment Screws Explained - 2-Stroke - Chainsaw Won't Start
A Fascinating Explanation showing how the Carburetor Fuel Screws as part of the WHOLE System.
This topic is about the carburetor adjustment screws in a two-stroke chainsaw's carburetor and how they play a crucial role in the chainsaw's operation, particularly when dealing with starting problems.
Chainsaw Carburetor Overview:
A chainsaw's carburetor is a vital component that controls the air-fuel mixture entering the engine. The correct mixture is essential for efficient combustion and reliable engine performance. Carburetors have adjustment screws that allow you to fine-tune the air-fuel mixture, ensuring it matches the engine's requirements.
Understanding the Adjustment Screws:
There are typically three adjustment screws on a chainsaw's carburetor:
Idle Speed Screw: This screw controls the engine's idle speed. It sets the throttle plate's position when the chainsaw is at rest.
L (Low-Speed) Screw: The low-speed screw regulates the air-fuel mixture when the engine is at low speed or idle. Adjusting it can impact starting, idling, and acceleration.
H (High-Speed) Screw: The high-speed screw determines the air-fuel mixture at high engine speeds, such as when the chainsaw is cutting. Proper adjustment is crucial for engine power and cutting performance.
Role of Adjustment Screws in Starting Problems:
When a chainsaw won't start, it may be due to an incorrect air-fuel mixture. Here's how the adjustment screws are relevant:
L (Low-Speed) Screw: If the low-speed screw is too lean (not enough fuel), it can make starting difficult, as the engine may not get enough fuel to ignite. If it's too rich (too much fuel), it might flood the engine, making starting equally challenging.
H (High-Speed) Screw: An incorrectly adjusted high-speed screw can also impact starting. If it's too lean, the engine may not get sufficient fuel during acceleration, making it hard to start. If it's too rich, the engine may flood when you try to start it.
Carburetor Adjustment for Starting:
To address starting problems, it's important to check and adjust the carburetor adjustment screws if necessary. Proper adjustment ensures that the chainsaw receives the correct air-fuel mixture during starting. However, it's essential to follow the manufacturer's specifications and guidelines for your specific chainsaw model. Over-adjusting can lead to other performance issues or even damage the engine.
In Summary:
The carburetor adjustment screws in a two-stroke chainsaw are critical for controlling the air-fuel mixture. When the chainsaw won't start, adjusting these screws can help ensure the engine receives the correct mixture for successful ignition. However, it's crucial to understand the impact of each screw and to follow the manufacturer's instructions to avoid further issues.
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!
Many thanks indeed
Craig Kirkman #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. www.amazon.co....
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[@TheRepairSpecialist]

All Episodes -for 2-Stroke Carburetors Here. Thanks. Craig:
ua-cam.com/play/PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD.html

[@-infinity0infinity61]

As always to the point and not about what your dog is doing that day! Love your effort. Thanks for being there. Gretch

[@ltcameron1]

These are cracking videos. Thank you so much. Great to hear a British voice instead of the legion of american videos. Love this series. Really useful. Wish I could fix my mercury mariner though. Love to see a video on replacing crankshaft seals.

[@juliamarple3058]

I can not get to the low screw on my carburettor. It always needs chock. Occasionally it would have a sudden rush of energy then dies down again. A bit smokey to. Adjusted H screw and new fuel lines and new fuel with correct mix. Adjusted the reffing screw. Running better, but still not right. I cannot undo the spark plug... it’s too tight.

[@coriegordon7765]

I adjusted the screw but still no power.. i rev and the back wheels spin. I just had it working after..
Cleaning the carberater
Changing fule line and filter
Grease all wheels
Adjusted breaks
If anyone can help

[@alanbrbyowitherington2705]

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