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Crawfishkarl

1999 arctic cat 300 4x4 blows smoke

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I just picked up this project for my son. It has been sitting up for a year. I have drained the fule tank and replaced the battery. I can get it to turn over it i keep the starter engaged. It will fire and try to run but blows white smoke. I am thinking the rings are seized. any suggestions?

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Well.... I put seafoam in the piston and went to check the oil and was met with a geyser of oil and gas. Appearently they must have had a full tank of gas and didnt shut off the fuel when the quit using it. I will work on it today and see where we are.

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Looks like the carb needs a good cleaning. I always thought white smoke was coolant but I think your ATV is oil cooled. Maybe it is some of the condensation in the exhaust burning off. If is is smoke from oil replace the rings and check the cylinder clearances.

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Well i got it running. It is hard to start and still smokes but not alot. I am going to treat the gas and clean the carb. I am going to continue with the sea foam for a bit and see if that doesnt solve the problem. if not looks like a set of rings are in my future.

How tough of a job is it?

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It's not too hard if you take your time and definately download the manual, there is a link in the forums.

If it is hard to start I would suggest checking the valve clearances which are also listed in there.

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