what kind of motor is it?
150 mercury EFI
Thanks for the reply. I was thinking the same thing. At idle it looks like it os spitting. It doesn’t start spraying until it reaches medium throttle
is it a steady buzzer or is it going on and off like beep, beep, beep
Steady
Its in the lake
If you don't know when the last time the motor was serviced you have to have a starting point. That being said you should have the whole water system done. That means not only the water pump impeller with both housings but both thermostats and the by pass diaphragm. Don't forget to change the lower unit gear lube and remove the prop and grease the shaft. Now when it's running at idle you should have about 5-10 lbs of pressure at the gauge and a got stream at the tell tail.
Valid point. Instead of risking a breakdown on the water, be safe and know you changed the important stuff.
You should be able to touch the top of the cylinder head or block if it's not over heating. The thermocouple ( that's the sending unit in the head ) goes off at 186 degrees .
I had the same thing. After trying everything I called a few marinas and then Mercury dealers. All said that it was likely the oil alarm and that it had gone bad since the oil was full and the motor was not overheating. The replacement would take 4-5 months to order. It was suggested and I just unplugged the alarm and keep an eye on the oil level. How to unplug the wire is on YouTube. It was located under the oil tank in the motor.
