Posted by Vaughn on Tuesday, October 11, 2005 at 9:07PM :
In Reply to: Question RE: Backfiring posted by dave horvath on Tuesday, October 11, 2005 at 10:28AM :
Is the engine still rotating when it happens?
If it's still rotating, the float is probably set to high and you have a hot spot somewhere in the exhaust where gas is building up and igniting.
Do you have a new muffler? If it's old probably a thin rusted area that's getting hot and causing it
Trouble shoot
1. Heat up the engine, then take off the exhaust pipe at the manifold and run it and see if it happens. If it does it's someplace between the combustion chamber and end of exhaust manifold and don't rule out cam timing and valve adjustment
2. Continue attaching exhaust pipe, test, then muffler. If it happens with muffler, make sure float is set right, if its an old muffler, replace
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