Polaris ATV Forum - View Single Post - 325 trail boss will not run with air cleaner on
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post #5 of (permalink) Old 06-18-2019, 11:49 AM
Polaris ATV Legend
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Join Date: May 2014
Location: Illinois
Posts: 4,124
Let's presume the gas was left turned on - so the engine is full of gasoline - if you haven't already changed the oil get ready to and get a large drain pan - drain the oil out, see how thin it might be and if it smells like gas. Install a new filter, put two quarts of oil in the engine, start it and let iT idle a minute, shut it off and wait about 30 seconds to check the oil (while you are waiting, take the dipstick out and wipe it off, the dipstick has to be screwed in when checking the oil) - if it's not screwed in it will be over full.

Might be the crankcase is full of gas and when you are trying to run it the gas vapor is being sucked into the intake through the crankcase vent hose - that would also explain the oil on the air filter

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