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#12830322 - 07/16/18 02:12 PM 1999 40hp yamaha alarm
BigLeslie Offline
TFF Celebrity

Registered: 07/09/03
Posts: 5641
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)

#12866313 - 08/16/18 11:50 AM Re: 1999 40hp yamaha alarm [Re: BigLeslie]
BigLeslie Offline
TFF Celebrity

Registered: 07/09/03
Posts: 5641
Just in case anybody is trying to troubleshoot a similar issue down the road, learn from my mistakes:

1) The seller ran the motor for me at his house before I bought it, the entire boat was in amazing condition and it ran great, no alarm. I felt confident enough to buy it (wasn't over 4K) without putting it on the water. Dumb.
2) The seller assured me the water pump was recently replaced, it turns out this was true but whoever did it failed to remove some of the old parts which disintegrated and stopped up my flow even though there was still water coming out of the peehole it was not enough causing the alarm to go off. This explains why the alarm did not sound for the previous owner. Whoever did the install of the new water pump didn't know what he was doing, I should have asked about who did the work.
3) Angler's Marine at Cedar Creek Lake has my business again so far. Seems legit, good communication, repairs done as promised. Taking it to them appears to have not been a mistake (but I haven't got the bill just yet lol)


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