I have a Lawnboy mower model 10796 with a honda engine with electric start. The starter didn't engage and the bendix wasn't working properly I've tried 4 new starters that when initially installed will start the engine with a few test starts but then will fail like the original. When removed from the engine but still hooked to the battery the bendix will not engage. I've checked the teeth on the flywheel, the engine starts with the pull rope with no binding or kick back. I am at my wits end as to why these starters fail.