150 HP Alarm Came On

I have a 2005 - 150 HP, 2 cycle, carbureted Yamaha Outboard and had the alarm (buzzing) went off this weekend also. After a day of boating, I was flushing the engine with the “Mickey Mouse Ears” and after about 10 minutes of running the alarm sounded. I immediately checked to see if water was pumping and found nothing unusual. I shut the engine off. Turning the key to the on position, without starting the engine, produced the alarm again. I checked the boat oil tank and it was ¾ full. The fuel gauge was registering as low as I have ever seen it. I towed it up to the fuel pump and prepared to fuel up. I turned the key to the on position and no alarm sounded. I proceeded to add fuel. Towed the boat back home and ran it again, with the “Mickey Mouse Ears”, for about 15 minutes. No alarm sounded. Is there any chance that the alarm was a result of low fuel as opposed to overheating or low 2 cycle oil? If not what would be some trouble shooting tips to determine the cause of the alarm?

[jb123]

yamahas are very sensitive to non sufficient or interrupted water flow, thats most likely what caused your alarm.
If you havent changed your waterpump, stats and PRV, you should do so as general maint.

Yamaha Gauges?

That is a good question. My first impulse is to say no, based on some of the reading I have been doing which indicates there are low oil lights on the tachometer. I do not believe my gauges have that function. How do know if the gauges are Yamaha?

Ok...will take pic and send.

Thanks for the help.

i had a similar problem is the oil filled

Oil tanks full

Yes...the engine tank is at the high limit and the boat tank is 3/4 full. Was the low oil level your problem of did it turn out to be something else?
I did some maintenance this weekend and ran it on the hose with no problems