After you have cleaned or replaced the air filter and made sure the gas tank is at least half full the next thing you can do to adjust the carburetor is balance the high and low speed screws. Dont forget the idle adjust screw the big screw.
As soon as your chainsaw is warm check to make sure the high and low speed screws are turned completely in.
How to adjust chainsaw carburetor.
If this adjustment is set too low the engine will die when the throttle trigger is released.
An extremely lean adjustment will also cause the engine to die.
If you screw in the low screw it will run leaner.
At this stage you need to.
Adjust this screw too rich and the chainsaw will blubber and die at idle speed.
This is the adjustment that controls the airfuel mixture at high rpms.
Most chain saw engines have three carburetor adjusting screws.
Adjust this screw too lean and the engine will starve.
The saw will race or surge.
Unscrew the low screw and it will run richer.
Use the high screw to set idle and also top end.
Start by removing the plate covering the diaphragm and check if it is used well.
Stihl chainsaw carburetor rebuild.
Remove the gaskets and place them down in the order you.
Idle speedthrottle stop this is the adjustment that controls how much the throttle valve butterfly stays open when the throttle trigger is released.
H high speed adjustment screw this is the high speed jet.
Before replacing the gaskets you may need to clean or replace the fuel screen and needle valve.
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