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FO-4 muffler

1814 Views 3 Replies 3 Participants Last post by  mac102004
Old muffler rusted out. Bought a FO-4 from Tractor Supply, bolted it up and now it wont fire. I'll get a pop every once in a while.

Can take the muffler off and it will fire up. Put it back on and nothing.

Anyone have this problem or install the FO-4 muffler? Hoping I do not have to rejet, hoping it can be adjusting with screws....Where do I even buy new jets?
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your having trouble because it does not supply enough back pressure when cranking it over.
1 - 1 of 4 Posts
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