85 Yamaha 90 HP Warning Buzzer ? Help !?

[starcraft]

Hi, <br /><br />I need help on this one. My warning buzzer starts going off at idle speeds after cruising aroung the lake at a good clip. The engine does not appear to be hot. The impeller was replaced about 30 hours ago. However, this was the first run in about 2 years.<br /><br />Other than the impeller, what is likely to be the problem ?<br /><br />thanks !, john c.

 

[12Footer]

Re: 85 Yamaha 90 HP Warning Buzzer ? Help !?

Yes, I would change-out the impeller. What happens when an outboard sits for a year or sio, is the impeller will form a shape to the concentric pump housing. The impeller you pull out will look fine,but some or all of the vanes will have a curve in them.

 

[starcraft]

Re: 85 Yamaha 90 HP Warning Buzzer ? Help !?

Thanks, I'll check out the impeller. Do you know if the warning buzzer might also indicate oil pump problems (Although I don't think so in my case because it is really running great).<br /><br />thanks, john c.

 

[12Footer]

Re: 85 Yamaha 90 HP Warning Buzzer ? Help !?

Yes ,( sorry ,I'm on a one-track path tonight)it could be indicating a low or no oil on an oil-injected engine. The senders are the most common item to fail, and the sound of the buzzer will tell you what's up. Consult the owner's manual for the definitions.

 

[John from Madison CT]

Re: 85 Yamaha 90 HP Warning Buzzer ? Help !?

The warning buzzer goes off for 2 reasons:<br /><br />1. Critically low oil in the reservoir in the oil tank. The buzzer is not in anyway connected to the oil pump, but bear in mind, these Mikuni-Yamaha oil pumps are very reliable.<br /><br />2. Powerhead overheating.<br /><br />John