Quick Answer: How To Tune The Carburetor On A Chainsaw.?

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 fuel mixture on a chainsaw?

Carburetor Adjustment Procedure

  1. Before you start the saw, locate a small flat-bladed screwdriver.
  2. Begin by checking the saw’s air filter.
  3. Check the fuel level.
  4. Start the engine and warm it up.
  5. Begin by setting the idle speed.
  6. Set the low speed fuel adjustment.
  7. Go back to step (4) and reset the idle speed.

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.

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.

You might be interested:  Question: How To Adjust Carburetor Mixture Screws On A Tractors?

Why does my chainsaw start and then stop?

The carburetor might be clogged. 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 I know if my chainsaw spark plug is bad?

What Does a Bad Spark Plug Look Like and What Makes It Look That Way?

  1. Black, chunky carbon buildup spanning the gap between the sparking end of the plug and the hook-shaped metal piece overhanging the end.
  2. Dark carbon residue built up on the ends but not spanning the gap.

How do I know if my carburetor is rich or lean?

Q: How Do You Tell if a Carburetor Is Rich or Lean? A: One way to tell for sure is by “reading” the spark plugs. If the plug tip is white, the mixture is lean. If it’s brown or black, it’s rich.

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 I get my chainsaw to idle?

First set the idle speed by setting it as high as possible without engaging the clutch (close to 2700 RPM if you have a tachometer). Then set the low-speed screw by turning it gently in until the engine begins to starve for fuel, then turn it out gently until the engine loads up.

Leave a Reply

Your email address will not be published. Required fields are marked *