Table of Contents
The Job of the Carburetor Without the right amount of air and fuel in the piston cylinder, the 2-cycle engine in a Stihl chain saw runs inefficiently and the saw loses power. When the saw bogs down during cutting, it’s usually the high-speed screw you need to adjust.
Why does my Stihl chainsaw stall when I give it gas?
An engine stalls when it’s getting too much or not enough fuel from the carburetor. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. If the saw stalls while it’s idling, adjusting the idle screw, which usually is marked LA, should help.
Why does my chainsaw stall under load?
The carburetor needs clean air entering it and a clean path for the exhaust through the muffler to keep running. Carburetor adjustments to increase the high speed will also correct stalls under load, as well as routine cleaning of the tool to prevent a noticeable loss of engine power while under load.
Why does my chainsaw lose power?
1. Dull chain and or improper lubrication to the bar and chain, sharpen and or clean the bars oil holes. 2. Air filter and fuel filter for restrictions and contamination, clean or replace as needed.
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 throttle?
If your chainsaw engine dies at full throttle, check the following parts: the carburetor, fuel lines, fuel filter, air filter, and muffler. When the carb becomes clogged (which is often the result of old fuel sitting in it over a long period of time, like over the winter), it will not perform this task effectively.
What causes a Stihl chainsaw to bog down when accelerating?
The Job of the Carburetor Without the right amount of air and fuel in the piston cylinder, the 2-cycle engine in a Stihl chain saw runs inefficiently and the saw loses power. When the saw bogs down during cutting, it’s usually the high-speed screw you need to adjust.
Why does my chainsaw rev too high?
The throttle valve (butterfly) simply cuts off the supply of combustible air/fuel and the engine stops. If this adjustment is set too high, the high idle speed will cause the centrifugal clutch to engage and the chain will run. This is a dangerous condition and should never be allowed.
How do you clean a chainsaw fuel filter?
Brush the air filter gently with a soft brush or wash it in warm soapy water then dry it. Do not use compressed air to clean it – compressed air can blow holes in the filter, allowing dust and debris into your carburetor.
How do you adjust the carburetor mixture on a screw?
Run the engine for five minutes at half throttle to bring it to its operating temperature. Then, turn the idle mixture screw slowly clockwise until the engine begins to slow. Turn the screw in the opposite direction until the engine again begins to slow. Finally, turn the screw back to the midpoint.
Where is the idle screw on a Stihl chainsaw?
The LA setting on Stihl chainsaws is controlled by a screw on the outer housing of the engine that adjusts the flow of fuel and air through the carburetor. This screw is inside the engine housing on the carburetor, but is accessible through a hole or gap in the outer housing of the saw.
Will a Stihl chainsaw run without a fuel filter?
Well as long as the lack of that fuel filter doesn’t cause leaking at the inlet connection, then yes it will run fine …. but only for as long as whatever the filter might have caught and preventing it from clogging jets and passages.
What does a spark arrestor do on a chainsaw?
The spark arrestor on your chainsaw prevents dangerous hot sparks from igniting fires while you’re working. If the arrestor is clogged or dirty, however, it will also prevent exhaust from leaving the motor, which can prevent it from running.
Can Stihl air filters be cleaned?
What’s more, HD2 air filters can be easily cleaned and reused multiple times: just spray the removed filter with STIHL Varioclean, leave the detergent to take effect briefly, then rinse and dry the air filter before reinstalling it.
When should I change my chainsaw air filter?
You should replace the filter once per year if the chainsaw has had plenty of use. It will depend on the rate of use and the amount of dirt and debris the unit has had to contend with. The air filter will gradually degrade and wear out.
Is it OK to remove spark arrestor?
You can safely remove the spark arrestor or even install an aftermarket exhaust system on many ATVs without having to make alterations to your jetting because they are normally set up to run a bit rich from the factory, but this is no general rule!.
How can I make my chainsaw sound better?
You can silence a chainsaw in two ways: creating a barrier between the noise and yourself, and ensuring that the machine works properly. Fixing loose mufflers, leaky exhausts, and rusty chains can reduce noise, and wearing earplugs and earmuffs over your ears will further quiet the chainsaw.
How do I get more torque out of my chainsaw?
My opinion the only proper way to get more torque out of a chainsaw, is to lower the “gear ratio” at the drive sprocket. That is run a smaller drive sprocket. Back in the day gear transmissions were a very reliable way of producing extra torque. .. Making a living with a saw since age 16.
