Yesterday I was out on the river and the boat was running GREAT. We stopped for lunch along a sand bar. While eating the boat swung to the side and got a little stuck in the mud because the the river was lower than normal. It was nothing major, and I was able to free up easily before I even powered up. There was a fair amount of silt in the area, but I wouldn't have thought enough to clog the water intake.
Anyway, less than a quarter-mile from the spot we started up from I turned around because I smelled "burning". I saw some smoke coming from the engine hatch. I immediately shut the engine off and noted the temp gauge was pegged HI. Prior to shutting it down the engine felt normal (e.g. not losing power). Although, my wife who was sitting in the back seat thought the exhaust was making a different/louder sound and she thought she heard some ticking/clicking when we first started up that went away.
I checked the oil after we stopped, and it was not cloudy/milky or black. It was still fresh looking. There was no oil or water in the engine compartment (bone dry), and not a lot of smoke... I couldn't tell for sure where it was coming from. I could hear a gurgling noise that I presumed was cooling water boiling/draining.
I had the boat towed to a boat ramp that was near by (too bad it was 15 miles from the one we put in at) and called it a day.
2000 Sea Ray with the 3.0 Alpha One
I have recently had the water pump replaced (start of last season) when I had the exhaust and shift cable bellows replaced.
Oil changed every winterization (only 8 or 10 hours this season - I've been gone for most of the summer).
Is it likely the water pump sucked in enough silt to obstruct cooling flow despite not being too bad (not in stuck in the the mud when I started up)? Is it likely there is larger scale engine damage, or did I catch it fast enough? What was the smoke?
I'm bringing this to the marina to be looked at tomorrow, but was hoping to get an idea of what to expect since I don't know a lot about marine engine repair. I want to make sure I'm making an informed decision regarding repair.
Thanks for your help.