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If your Stihl chainsaw starts up with a reassuring puttering sound, but dies when you pull the throttle trigger, there likely is an issue with the fuel, but the carburetor could need adjustment. If the saw stalls while it’s idling, it’s almost surely a misadjusted carburetor.
Why does my chainsaw bog down when I pull the trigger?
Many chainsaw operators first notice a problem with chainsaws bogging down when they’re using the chainsaw under load, and this is usually the result of poor air circulation. This issue is caused by a clogged air filter on the chainsaw. Wash the air filter in soapy water until the air filter comes completely clean.
Why does my Poulan chainsaw dies when I give it gas?
A clogged fuel filter is often caused by leaving old fuel in the chainsaw. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the fuel filter and cause the engine to stall.
Why does my chainsaw start and then die?
If the fuel filter is damaged, this debris can enter the lines causing a clog, and preventing your chainsaw from running. The fuel filter can also become clogged, and this will prevent fuel from reaching the engine, causing it to die. A fouled spark plug can cause your chainsaw to start but immediately die.
Why does my Stihl chainsaw bog down when cutting?
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 lack power?
If your carburetor is not tuned properly, the mix can be off, and this will result in a lack of power in your chainsaw. A plugged air filter will not allow enough oxygen to enter your chainsaw’s engine for combustion. Sometimes the filter can become so clogged with dirt and debris that your engine will not run at all.
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.
Why does my chainsaw only run with the choke on?
If your chainsaw only runs with the choke on, it is likely an issue with your carburetor. If the carburetor is plugged, the engine will be starved of fuel and will not run. However, if the engine is plugged, the choke will pull more fuel through the carburetor’s idle circuit and allow it to run.
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.
Why does my chainsaw die at idle?
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.
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? Black, chunky carbon buildup spanning the gap between the sparking end of the plug and the hook-shaped metal piece overhanging the end. Dark carbon residue built up on the ends but not spanning the gap.
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.
Can you run a chainsaw without a spark arrestor?
We can’t run without arrestors here, and the fire danger is so high I wouldn’t anyway. There is less restriction without it, but cleaning them from time to time helps a lot. If it’s hot and dry, I wouldn’t risk it.
Why does my chainsaw cut out when hot?
When your chainsaw quits after it gets hot, you either have a problem with gas flow being restricted into the engine or with the spark. This is a common occurrence on older-model chainsaws. By replacing your spark plugs and keeping your gas lines clear you can reduce the chances of this problem recurring.
Why do loggers run upside down bars?
Every chainsaw bar has been designed to be mounted right-side up or upside down. The reason for this is that it allows the user to extend the life of his chainsaw bar by 50%. Flipping the bar will give the heavily-used areas some relief from wear and tear. This reduces a chainsaw’s ability to cut accurately.
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!.
