Bought a used 1999 40hp yamaha and first time on the water it cranked right up then the alarm went off after running for maybe 5 mins. I checked the kill switch, it was secure and the alarm stopped. Overheating I suspect, but it was weird. Plenty of water coming out the [censored] hole. The alarm would go off usually after I ran it any time more than 2/3 throttle. I ran it for a good 30mins at 1/2 throttle with no alarm, pushed it a bit more and it would sound. The previous owner swears he never had the problem, he told me to mix the oil 50/1 and that's what I did when I gassed up I thought. Should I dump this tank of gas and try again? Or is there something else I should troubleshoot before taking it in to the shop? I had this happen with a newer motor one time, (didn't have to mix the gas and oil) and took it in the mechanic couldn't get the alarm to even sound when he tested it after it got off the water and it never did it again. I'm hoping it something like that? Likely or not?
After some googling I bet the water intake is stopped up I think I got too shallow when I beached her, going to try to clear that or take a look at the impeller (which was supposedly recently changed) hopefully that will do it, any and all suggestions will be appreciated, including a good boat mechanic around cedar creek lake.
Edited by BigLeslie (07/16/18 04:18 PM)