spark plug

Kohler SV540S will turn but not run,changed everything new, head gasket, lapped the valves and gapped, carburetor,air filter,fuel filter,still not run. Shows 65 psi compression. Could it be timing problem.Have not opened engine itself. What else should I check.It was warm then suddenly stops at...

Yes I am aware this plug is unusually wet, which makes sense as the mower wouldn't start. This is the machine that turned out to be overfilled with oil. But I'm only making this post to ask, what is the condition of this plug itself, not the motor overall. Besides behind wet, this plug looks...

I have a BVS 143 that needs a new spark plug. I have the owners manual, which has a diagram clearly showing the plug should have a reach of 8mm, and a gap of 0.6mm. It also states to replace the plug with a Champion RJ17LM plug. If I look up this spark plug is has a reach of 9.5mm, and a gap of...

In the shop, I have a vintage Garden Way Troy-bilt beast. I performed a valve job and valve lapping (the exhaust valve was not closing, no power or idle), and the machine is in excellent condition, and the owner wants to restore anything and everything to get another 20 years out of it. Anyway...