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I have a harmony Honda mower with new carb. Strarted with starting fluid and ran rough and backfired alot I think a valve problem because it sat in garage for a year. Helpme
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most gasoline today is being blended with ethanol and is the core source of most outdoor power equipment with starting and stable running after being stored for the winter. The ethanol gums up much quicker than traditional gasoline. One product that I used was from Walmart and made by the same company that makes Stabil fuel products. It is called Start. Mix with up to 1 gallon of gas(I placed directly into my Honda Harmony 5.5 mower gas tank and ran while mowing and it cleaned the carb without having to remove it. It is running as it did when new. Worth a try
You need to check a few things. The spark first, you need to check if it is running correctly, does it have spark, by doing this: take out the spark, put it against a metal surface and pull the pull start if it spark, your good if not you need a new spark plug. Clean out your airfiilter it migth help too. Buy some carb and choke cleaner squirt it up theough the airfilter hole, and start the engine, this will clen the carb. yOU MIGHT NEED TO TAKE OUT THE CARB AND CLENA I OUT THROUGHOULY!!! Try that and it whould work after all these steps!
IN your problem it might also be for some reasons like the crankshaft is bent, that damages the motor internally and cannot be fixed, hppens on older mowers. and is caused by when you run over twigs and branches andything hard!
Hi
Very possible that the valve is stuck open and piston could have hit valve causing it to bend at the head. This would cause valve not to close completely. Would have to remove head and remove valve and most likely replace intake valve.
Sound like you've done things in the correct order, tecumseh's are notorious for carb problems if you let as sit in them. Backfiring is timing related (flywheel key) or valve problems. I would take a closer look at the exhaust valve I don't believe it is closing all the way.
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