I use vinegar on the exhaust tips and other parts. My prop does not get dirty but I boat only in fresh water.

LMFAO at "prop wash"...

treat with sno-bol, lime away, or whatever acid based cleaner and then a cycle in the dishwasher. Works best when the wife isn’t home, well works the same but much quieter.

I tried the bio clean yesterday and it does work really good! Thanks for the suggestion