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FourTrax 300: Running rough after filter change

6061 Views 10 Replies 5 Participants Last post by  ostrx250
I recently changed the air filter on my '90 300. Since the change, the motor is running very rough, I have to choke it almost all the way. It won't run with the choke off.

Seems like an obvious fuel / air mixture problem. Advice? I saturated the filter in oil, although I used chainsaw oil, not air filter oil (couldn't find any and this was recommended as a substitute).

Any input greatly appreciated.
1 - 2 of 11 Posts
you use the gas oil or the blade oil i know silly question but if you used blade oil its way to thick prob a 30w oil and helmut has you covered for the rest
i would get the correct filter oil just to be sure and welcome 3gig
1 - 2 of 11 Posts
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