upstate bob

dead mouse in the muffler?
mixture?
nearby pig farm?
if you want a temporary sweet smell fill up with aviation 100LL

mine smells ok and I'm certain my mixture and injectors could use some attention.
I'll get around to it, maybe this summer????
79 5sp

jeff spahn

Yes, very temporary and then you can buy new cats.

MFranke

May want to disassemble the exhaust and clean the pipes out. Dead rodent and all the hoarded nest material or food it may have collected would not surprise me.

Randy V

The OP had his reasons.