99 Sportsman 335 runs way rich won't idle
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99 Sportsman 335 runs way rich won't idle
I picked this bike up with this pre-existing condition so I don't know how it got this way. Thought it would be an easy fix but it's really frustrating me. 1999 Polaris Sportsman 335. Will not idle for more than a few seconds, runs very rough and misses at lower rpm's. Choke/enricher has no effect at all on how the engine runs. Hot or cold it makes no difference.Starts up with no choke every time. I cleaned and put a kit in carb, changed air filter, fuel filter, new fuel pump, new plug. Replaced CDI with RM stator DC conversion, new coil. Nothing has made a bit of difference. Compression is 80psi. I even checked the cam lobes and they look good. Spark plug is sooty black within a few minutes of running. Does anybody have any ideas about what could possibly be going on with this thing? I'm about out of ideas. Bike runs terrible!
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Mike O
Polaris Ask an Expert! In fond memory of Old Polaris Tech.
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03-02-2019 08:32 PM
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