200 Series Searay 1994 with Mercruiser 5.0 Alpha 2 Gen 1. Two barrel.
I have a very odd issue that a few shops can't figure out that I need help with. We start the boat at the ramp, warm-up, and run for 30-40 mins around the lake with no issues. Then stop in a cove for 2-3 hours, then depart...