More Info, page of 381, chapter index, chapter.
Clogged fuel tank breather tube, misadjusted fuel level, too much fuel getting to the engine.
These can be diagnosed by a compression test, or by tracing top-end noise with a sounding rod or stethoscope.
If you dont know the source of the trouble, go to the troubleshooting page for a list of causes and effects to determine the problem.
Snowmobiles, all-terrain vehicles (ATVs ranger utility vehicles, victory motorcycles.