OK, fellow shade-tree mechanics, I need a little help here. My son as a 2009 Polaris 50cc ATV, which OCCASIONALLY dies while riding through puddles.
- Usually, it will fire right back up. However, occasionally, we have to crank it for 5-10 seconds.
- The water he is crossing is not particularly deep--roughly axle high on him.
- The stalling does not seem to be particularly correlated with puddle depth. He's done some deeper crossings just fine, while then stalling out on shallower ones.
- I'm not finding any water or debris in the air box. The air box intake is up near the gas tank, so besides possibly a drop or two of spray, no water should be getting in, let alone through the oiled foam filter.
- I turned the idle speed up this week, and that seemed to reduce, but not eliminate, the problem. I also drained the float bowl this week, but misunderstood where the fuel would flow out from, so I wasn't able to inspect the gas which came out and ran over my garage floor.
- Every time when I come back, the kill switch is in the "run" position, so I don't think that he's hitting it.
The kicker here is the intermittent nature of the problem. I have the machine's shop manual. At this point I'm not sure if this is a carburetor or electrical problem.
Any suggestions on what I should check? Thanks.