Reasons Why Your Chainsaw won’t Idle?


“Why won’t my chainsaw idle?” is a question that many people with gas-powered engines ask themselves. This is because the throttle cannot be adjusted, and it can be very frustrating when you are trying to get your work done. However, there are ways to change the throttle so this doesn’t happen.

1.   MAKE SURE CHOKE IS OFF

The first step to ensuring that your saw will idle is to make sure the choke is off. If you have a gas-powered engine, there should be two levers on the right side of the handlebars. Check if one of them says “choke” or has an image of a flower within it. This lever needs to be pushed toward the back of the chainsaw. This will ensure that you have a full, rich flow of gasoline to your saw’s carburetor and it is prepared for running in all conditions without stalling out or not starting at all.

2.   AIR FILTER CLOGGED?

If the choke is in the correct position, make sure that your air filter isn’t clogged. If it is, this can cause a lack of power and prevent you from having an idle chainsaw. To fix this problem, unscrew the screws on top of where the cover was located (usually four or five) to access the air filter. Pull out any debris and replace the cover before you try to start your chainsaw again.

3.   BAD GAS?

If the air filter was not what caused your chainsaw to stop idling, you might need to check out some of the other parts on your saw. For example, if it is a gasoline-powered engine, make sure that you have fresh gas in your tank and that it isn’t older than 30 days old. Old gas can cause a clog in your fuel line, and it won’t allow the saw to idle. If you need help with changing out the gas or cleaning things up, make sure to consult a professional before trying anything on your own.

4.   FUEL LINE OR FILTER CLOGGED?

If you have checked all of these things and your chainsaw still won’t idle, then it may be because there is a clog in the fuel line or filter. This can happen when too much debris gets into the carburetor. To check this:

1.   Remove the cover located on top of the gas tank (usually four or five bolts).

2.   Pull the cover off of where the filter is located (usually one bolt) to get access to your fuel line.

3.   Clear out any debris inside and ensure that it goes through both filters before putting everything back together again.

5.   FOULED SPARK PLUG?

If you have checked everything above and it is still not idling, then there may be a problem with your spark plug. To check this out, unscrew the cover located on top of where the gas tank was (usually four or five bolts) to get access to your spark plug. Remove any debris from around the spark plug and ensure that it isn’t too dirty to be cleaned. If you see any problems with the plug, like if its threads are stripped or corroded, then replace it immediately so you can avoid significant damage when trying to start your chainsaw in the future.

6.   PRIMER BULB IS CLOGGED OR LEAKING?

If you have checked everything above and your chainsaw still isn’t idling, then it may be because the primer bulb is clogged or leaking. If this is happening, try to replace it right away for the best results in getting started. To check if the primer bulb needs replacing, unscrew four bolts on top of the carburetor to gain access. Pull off any debris and make sure there are no cracks in the primer bulb itself before replacing it if necessary.

7.   IDLE PORTS ARE CLOGGED?

If you have checked everything above and your chainsaw still isn’t idling, then it may be because the idle ports are clogged. To get access to this area, unscrew four bolts on top of where the carburetor is located (usually five or six) to pull off any debris in there. If it looks like the idle ports are obstructed, then this could be causing your saw to not idle at all, and you will need to clean them out before making any other adjustments or repairs.

8.   HIGH/LOW SCREWS AND ADJUSTMENT IDLE SCREW NEEDS CALIBRATING?

If you have checked everything above and your chainsaw still isn’t idling, then it may be because there are issues with either the high/low screws or adjustment idle screw. To get access to these areas, unscrew four bolts on top so that you can pull off any debris located near where they are. If the high/low screws need to be calibrated, adjust them to be at equal height. This can be done by rotating one screw until it is parallel with the other and tightening it down to lock things in place before putting them back together again. To calibrate the idle adjustment screw, set it between half an inch to three-quarters of an inch from the high screw. Then, tighten it down until you notice that your saw is idling smoothly again before putting back together once more.

If you have checked all of the things above and your chainsaw isn’t idling, then there may be an issue with one or more parts that are causing it to not idle. To get started on fixing this problem, make sure to replace any missing/broken parts before taking other measures like cleaning out debris in different areas. If you have checked everything and still cannot get your saw to idle, it may be time for a professional repair.

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