BillK2632
Well-Known Member
Sounds like you have on all accounts above. One thing I would insure in addition to the new OEM risers and correct spacers if needed. Install new flappers in the Y exhaust pipe. This is an additional measure against water running back up though the exhaust. But yes, I think the root cause of your engine problems is an incorrect exhaust installation that was hidden with the boat being stored on a lift.