Re: Will not restart after warm.

Posted by HH56 On 2012/2/6 12:27:47

Assuming you can see gas squirting into carb when accelerator is pressed, that should indicate whether fuel is at the carb or is being starved. Many reports of the ceramic filter clogging from varnish. Able to pass air if you blow thru but not enough fuel and carb eventually runs dry. Usually that problem shows at higher engine speeds. I would think a weak pump would also show up at higher rpm.

If gas delivery is OK, have you verified the ignition system. When engine is hot, there is strain on the starting motor and the increased load could be pulling the voltage down. It doesn't take much voltage drop before there is a very minimal spark which can't quite ignite the gas but may ignite the ether in starting fluid. Once engine starts and no load from starting motor, spark is adequate.

Are the battery cables the large original size and connections clean. Both of those items -- too small of aftermarket cables and corroded connections -- have been the cause of many reports of hard starting. A weak battery or cell could also be a problem.