If you'd rather another expert answered, I'd be happy to opt out. If they're loose, it's possible as the compression release won't work, but not likely unless the engine is seriously worn. ![]() This has only 3 causes -Ģ) Broken (or incorrect) flywheel key (possibly as a result of 1 above)Ī suggestion from jrwhitey_2000 says check valve clearances. Regardless of all this, if the engine kicks back and the blade is not loose, the timing is wrong - that's the reason for a non-start if you have sparks and fuel, which you say you do. You said the flywheel key was replaced - I assumed that was because it was sheared, which is an extremely common problem.įor ignition coil read ignition armature - I'm assuming it's solid state - there were a (very) few Vantage engines built with breaker point ignition - but none for mower applications. 1 TECUMSEH T E C H N I C I A N S H A N D B O O K This manual covers engine models: ECV, H22-80, HH40-70, HHM80, HM70-100, HMSK70-110, HMXL70, HS40-50. ![]() OK - I've rebuilt about 500 of these engines, but sometimes it takes more than one attempt to crack a problem - especially unseen.
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