The boat.... 1979 Tiara 2000 with a MerCruiser 898.
The problem... Backfire thru the carb after trolling (for hours).
Runs fine on the way out, runes fine trolling all day, get ready to head back in runs like crap.
Backfires thru the carb so bad i cant get more than 2000 rpm.
Things that I have...