Here’s a real puzzler for you guys. First run of the season going down the channel to the sound and I knew something wasn’t right because the throaty sound from the exhaust tells me the water isn’t flowing right (and I also could see that the water output was down a good 50% versus normal) and sure enough the temperature is rising and so I back off on the power, and we nurse it back to the dock motor sailing. I checked to make sure that the water pump intake hose is properly clamped and it is. I then pull off the water pump impeller cover for an inspection and find that all the impeller vanes are just fine which they should be because I replaced it last season. I then lubed the cover and put it back on. I then removed the intake hose which you can do on this particular boat without causing a flood as it is above the waterline at the water pump. I then lower it and aim it under the motor so water would flow into the bilge and plenty of water comes out. I saw no debris. I then put the hose back on and clamped it properly. As a final check, I sprayed detergent on the connections while the engine was running to see if there were any tiny leaks and I did not see any. Now, of course I did not do this before. I started pulling things apart so I can’t say what it was like beforehand. I thenran the engine up at the dock And the gurgling sound disappeared and plenty of water is now coming out. I ran it pretty hard and the temperature did not elevate above 180 which is kind of where it tends to run at 3/4 throttle. So does anybody have an idea what is going on here? What are the things should I be looking at? Thanks in advance for any help you can offer.
Overheat adventure on 1985 Universal M12
- Thread starter odaydokay
- Start date
Any chance your fiddling could have knocked some crud out of the mixing elbow (assuming you have one)?
