Thread: Over propped?
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  #43   IP: 155.186.122.195
Old 10-10-2021, 10:46 AM
Dave Neptune Dave Neptune is online now
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Rick, when she revved up and was moving water was there a difference in sound?
Sooty plugs can be caused by an over rich load situation or back pressure in the exhaust. First how old is the exhaust? And the last time it was replaced was the exhaust hose replaced? The hose can collapse on the inside causing a restriction and pop open occasionally with an increase in performance while open. Did you run the engine with the exhaust unhooked under load?
I doubt it is the carb as you changed the jet and should of noticed any debris in the bowl.

Dave Neptune
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