75 MERC MAKING NOISE

[BEMIDJIJOE]

I have a 92 Merc 75hp. the other day I heard the oil buzzer go off. I immediatley stopped and filled the resivor. After that I went across the lake and when I slowed down I could hear a squawking noise coming from the moitor (it sounded similair to a squeeking fan belt on a car). When the motor idled the sound would go away. But once the motor got higher RPM's the sound came back. I was told that this could be caused by the motor not getting oil. My motor hasall the power it should and runs fine. I did not drive it much after the noise started. So, I have a few questions.

1. Does this sound right?( not getting oil.)

2. How long would it take to "cook" my motor if it is true?

3. What should I mix the oil/gas for my motor?

4. Any other ideas?

Thanks guys

[92python]

Is the sound a long continuous beep similar to the warning momentary beeps you get when the oil is low?

[BEMIDJIJOE]

no it is not the buzzer. it is more of a skreach. Any idea what the oil mixture would be?

[marine_man]

The mixture is 50:1 gas:oil... a pint of oil to 6 gallons of gas...

As far as your problem it's tough to say for sure... what I'd do is pre-mix your gas and monitor your oil consumption in the tank - if after a little while you use some oil you know your oil pump is still working.

marine_man

[PerchJerker]

I had a similar thing going on with a 60 HP tiller Merc when the motor was only 1-2 years old. It was some intermittant short somewhere that was making the warning horn screech or squeal.

[azzclwn]

It's a bushing that supports the driveshaft going down to the lower unit.

I had the same thing in my 2001 75, spray some silicone liberally on the shaft where it comes out of the powerhead. It will run down the shaft and loosen up the bushing.

Does it only squeal after you have run it hard for a little while?

Spraying the shaft quieted mine down,,,,, so far.

[BEMIDJIJOE]

yes it only seems to squeal after it has been run hard for a period of time. I will try that thanks.