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5 hp tecumseh mower. plug is firing. carburator bowl is full of gas and float is working. won't start!

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  • Anonymous Mar 24, 2014

    don't know what to check and how to check it. please help. thank you

  • Anonymous Mar 24, 2014

    how and what do I check? thanks

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Check the flywheel key. It is the most common problem I have found when a Tecumseh either wont fire or backfires. When you have the flywheel uncovered, take a nut the same thread as the flywheel. Remove the one from your machine and use the other one for the next operation. Take the new nut, place it on the sshaft in place of the one that was there. Lift the flywheel with one hand (to get a strain on it) and with the other hand, rap the nut with either a wood mallot or a regular hammer. You may have to rap it sharply. The flywheel will come loose and you can see the problem. Go to a small engine repair shop and get a new flywheel key. Install it and go about your cutting. Good luck...Lee

Posted on Sep 04, 2009

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Posted on Jan 02, 2017

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