How To Adjust Carburetor Fuel In A Chainsaw?

How do you adjust a chainsaw carburetor?

How to Tune a Chainsaw Carburetor

  1. Start your saw and run it for a few minutes to warm it up.
  2. Set your saw down, let it idle for 30 seconds, and then pick it up and tip it forward (handle up and bar down).
  3. If it keeps running, go to Step 4.
  4. Rev (accelerate) the idling saw.
  5. If it accelerates fine, go to Step 6.

What does the L and H mean on a chainsaw?

The letters on the screws represent High (H), Low (L) and Idle (T). The H screw regulates the Air/Fuel mix during high RPMs, while the L Screw does the same during low RPMs. This adjustment screw is responsible for adjusting the chainsaws idle.

How do you adjust the carburetor on a Stihl chainsaw?

They are the high-speed, low-speed and idle adjustments respectively. Determine the carburetor type before adjusting the high- and low-speed screws. To do this, turn the “L” screw clockwise as far as it will go, using a flat-head screwdriver, then turn it counterclockwise as far as it will go.

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Why does my chainsaw dies when I give it gas?

Because your chainsaw will idle, but dies when it is revved up to full power, it means that the filter is only partially clogged; it will allow enough fuel to the engine to run on idle, but not enough to sustain full throttle. If the filter becomes clogged, not enough fuel will reach the engine for it to run properly.

Why does my chainsaw keep stalling?

A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall.

How do you adjust air fuel mixture screws?

Turn the screw clockwise until the engine starts to sound rough.

  1. Tightening the screw weakens the air and fuel mixture and decreases the amount of fuel flowing to the engine.
  2. Tightening the screw is also called making the fuel mixture leaner, which lowers the RPMs at which the engine idles.

What are the two adjustment screws on a carburetor?

Instructions. Locate the two adjustment screws on the carburetor. One screw is for the idle speed or low speed; the other is for the high speed. Turn both of the screws counterclockwise to back them out.

How do you adjust a running rich carburetor?

Regardless of whether or not the engine is running too rich or too lean, bring it down to a very lean mixture by turning both screws a quarter-turn at a time, counter-clockwise, then slowly bringing them back up to an equal and smooth mixture.

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How do you adjust a high and low carburetor?

Locate the two fuel-adjustment screws on the side of the carburetor. One will be labeled “Hi” and the other “Lo.” The “Hi” screw regulates the engine at full throttle and the “Lo” regulates the fuel when the engine is idling.

How do you know if your chainsaw is running lean?

If your saw is running LEAN it will be doggy on acceleration, Have a white arond the exhaust and the spark plug will also be burning white in color.

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