Happy holidays, folks. I'm a newbie to this board and to Malibu boats and would very much appreciate some advice on an overheating issue. I have a 2014 LSV 247 with an Indmar Monsoon 6.0L engine and a v-drive.
I had a bad impeller and the boat overheated. I shut it down when the alarm went off, but it got hot enough to bubble the finish in a spot on the exhaust manifold. I replaced the impeller, which wasn't too bad. All of the fins were there with no big chunks missing, though the end were tattered. But upon starting it, the temp shot up. I then took a bucket filled with water that has a clear hose connected to the bottom and connected the hose to the raw water intake hose. When I ran it, it sucked up water from the bucket, so the impeller is working. I double checked all of the water system hose connections and drain valves and they are all in place and secure. I figure the problem must be either 1) the thermostat is stuck closed, 2) the water circulating pump is fried, or 3) bits of the old impeller are creating a blockage in the system. #3 seems unlikely given the shape the old impeller was in.
Left to my onw devices, I'd pull the thermostat and test it in boiling water. Then I'd check for blockages. Lastly, if none of that worked, I'd replace the water circulating pump. Is there a way to test the thermostat without removing it? I there any way to test the water circulating pump without removing it or at all? Could it be a different cause all together? If anyone has any experience with this and can help me shortcut this diagnostic, I'd greatly appreciate it.
Thank you,
Brent