As seen in Speedboat Magazine’s September 2018 Issue.
Got a weird one for you. I am stumped.
I was working in a buddy’s boat last weekend. He bought a bare hull and stuck a 496 and Bravo One drive in it that had been sitting around for a while. The interesting thing is it will run fine for several minutes, then slow down, then seize. When I hit the key, it seems pretty well seized. Let it cool for a few minutes and it’s good to go again. No funny noises or anything.
At first, I thought it was water reversion and hydro locking, but it happens even at 2,000+ rpm. Plus, I pulled the plugs and there is no water in the cylinders.