Just before we look at the most likely reason your saw won’t idle, we’ll need to check some of the basics, and I’ll fill you in on why they’re important, or if you want to skip all this, go ahead and slide on down to the “Adjusting the idle screw” below. If the chain is moving while the saws idling, then back the idle screw out a 1/4 turn until the chain stops, this fine-tuning can now be done with the saw idling. If the saw still won’t idle, you have cleaned the air filter, got fresh gas mixed correctly, the plug is clean & gaped, and adjusting the idle screw hasn’t worked.
High/Low carburetor adjustment and Idle screws allow the proper airflow through the engine. No matter whether you set this too high or too low- it will cause the engine to die at idle. The simplicity of a 2 cycle engine makes it fairly easy to diagnose and solve the problems you may experience when working with your chainsaw.
Your chainsaw will only idle for about 5 to 10 seconds after you let off the throttle and then it will shut down. A bad fuel line will cause the chainsaw to run lean, and this means it will only run at idle for 5 to 10 seconds before it shuts off completely. An air leak around the intake boot or head gaskets will result in lower compression pressures and your chainsaw won’t idle properly.
Finally, if your chainsaw resounds well but dies off when working under a load, then it might also be an idle problem as well. If you can start your chainsaw easily, and it runs smoothly without any issue, then the idle is working just fine, and there’s no need to tamper with it. Finally, if your chainsaw resounds well but dies off when working under a load, then it might also be an idle problem.
Try to relax and read our guide to possibly find the reason why your chainsaw won’t stay running. If the idle port of your chainsaw gets blocked or damaged, your chainsaw won’t stay running. If you have more chainsaw questions, here at Canberra Diamond Blade, we are happy to help! In the meantime, check out our other chainsaw articles answering questions like if it’s worth sharpening a chainsaw chain.
why doesn’t my chainsaw idle Related Question:
Why does my chainsaw start but wont stay running?
The most common problems why a chainsaw does not stay running are: Spark Switch/Plugs. Bad Fuel. Blocked Carburetor.
Why does my chainsaw dies when I give it throttle?
If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. 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.
Why does my chainsaw dies when I let off the gas?
After the throttle is let go, the vent closes and a small amount of fuel is still let into the carburetor keep the engine idling. If the Stihl chainsaw stalls after cutting, it is likely from problems in the carburetor, which will require an adjustment.
Why does my Stihl chainsaw not idle?
The two most common reasons a chainsaw won’t idle are a blocked air filter and an idle screw out of adjustment. Other possible causes include: Dirty Air Filter. Idle Screw out of Adjustment.
Why will my chainsaw only run on choke?
When your chainsaw only runs if the choke is on the problem, in most cases, is a result of fuel supply problems or a faulty carburetor. To fix the problem you should check and clean the fuel system and carburator.
Why does my Stihl chainsaw bog down when I give it gas?
The Job of the Carburetor One controls the fuel mixture when the engine is idling, one controls it when the engine is operating at low speed and one is for high-speed fuel control. When the saw bogs down during cutting, it’s usually the high-speed screw you need to adjust.
Can you clean a chainsaw carburetor without taking it apart?
To clean a carb, you have to take it apart. If it needs cleaning, the parts that need cleaning can’t be seen from the outside.
How do you clean a carburetor without removing it?
To clean a motorcycle carburetor without removing it, you’ll need to remove the bowls at the bottom of the carburetor. Once the bowls are removed, spray some carburetor cleaner up inside, wait a few minutes, then spray again to ensure coverage. Then replace the bowls and start the motorcycle to assess how it runs.
How do you clean a 2 stroke carburetor without removing it?
Vacuum away any loose dirt, dust, debris, grime, and great on the surface with a handheld and cordless vacuum. Lay out rags or cloths at the base of the carburetor to catch runoffs and protect the surfaces. Apply the carburetor and choke cleaner in thin, even coats. Then, wait for it to settle and work its magic.
Why does my Mcculloch chainsaw keep cutting out?
The air and fuel filters can get clogged or dirty which can result in the engine stalling. If these filters are clogged you should try to clean or replace them.
What is a chainsaw carburetor?
The carburetor on a chain saw is pretty simple, as carbs go, but it’s not entirely uncomplicated. The job of the carb is to accurately meter extremely tiny quantities of fuel and mix it with the air entering the engine so that the engine runs properly.
Will a chainsaw run without a fuel filter?
While it’s possible to run your chainsaw without a fuel filter, but this is not recommended. When a fuel filter is clogged, it can cause considerable damage to the engine and leave your chainsaw unusable.
Why does my Poulan chainsaw dies when I give it gas?
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.
What is choke on a saw?
The choke position is the fourth setting on the master control lever. This setting is used to start the saw when its motor is cold. Stihl chainsaws denote the choke position using a nearly horizontal squiggle between two vertical lines at the lowest position on the master control lever.
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.