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Capt31

1992 polaris trailboss 350l won't idle when hot

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I have a1992 polaris trailboss 350l that after I run the machine for awhile It will not idle, but when I let it sit it starts right up and idles. When I start it up first thing for the day it starts right up and idles it quits ideling when it gets warm any ideas or thoughts would be great.

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You might try adjusting the pilot screw to a leaner position. Or just turn the idle up.

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If I turn the idle up then it will run to fast when I shift into gear it will grind. I thought about the pilot screw. is there a safety on this when it geets warm it shuts down because I do not hear the fan run much if at all? I know there is a part on the engine that heats up and then turns the fan on I was thinking about bypassing this and have the fan run all the time but wasent sure if this was not working if this would have this effect.

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If it runs, but won't idle when it is warm, it wouldn't be because of any thermal shutdown protection. If there was a thermal shutdown, the machine would not run at all. I would first try adjusting the pilot screw and see if it helps. Does the machine run ok other than not idling when warm?

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I will try and adjust the pilot screw otherwise it runs fine. thanks for the help.

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