Could there be some kind of debris, like carbon deposit, that could have changed the plug gap? I'd expect the piston to melt before the spark plug. Do you check the gap when you check the plugs between runs?
Other than the welded appearance, your symptoms sound alot like an ignition coil going bad. They work for a while, then start to arc internally as temp goes up. Then the spark deteriorates. Herb -------------- Original message ---------------------- From: "John Vriesinga" <[EMAIL PROTECTED]> > I've got GM Harmuth's old Red Devil. I have yet to get a full event running > with it. It has been to a professional engine builder who is known around > North America for the engines he builds for drag racing snow mobiles. He > knows his stuff. Problem is, it will run great for a while especially when > cold, but then it just dies. ________________________________ FormulaCar Magazine - A Proud Supporter of Formula 500 The Official Publication of Junior Formula Car Racing Subscribe Today! www.formulacarmag.com or 519-624-2003 _________________________________ _______________________________________________ F500 mailing list - [email protected] To unsubscribe or change options please visit: http://f500.org/mailman/listinfo/f500 *** Please, DO NOT send unsubscribe requests to the mailing list! ***
