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· Registered
7 Posts
Discussion Starter · #1 ·
Hi All. Am working on an older King Quad, can't find any numbers on it, and it won't fire. I cleaned tank, put in fresh gas, check for spark all good. I even sprayed some gas in the cylinder and did not even get a pop! Any and all help is appreciated. Thanks.

· Premium Member
631 Posts
The optimal compression should be anywhere from 100 to 125 psi.Simple troubleshoot on a low compression engine
Put one tsp. of oil in the cylinder through the spark plug hole.
Run compression test
Higher compression = ring problem
No compression change = valve problem
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