Warning Buzzer

[tech62571]

2006 1800MX Mercruiser 3.0

While on the water, (engine off for about 3 hours) I started the Engine and the warning buzzer did not turn off. (always makes noise when the key is turned)

after I got underway the buzzer stopped

I got to another place and it was shut off for about a hour and the same thing happened.

When I got home and flushed the motor, it shut right off when I started it. (normal)

Anyone have a idea what it may be?

[donald]

The buzzer is controlled by water temp (too high), oil pressure (to low) and OD oil level (to low oil level), the OD oil bottle has a switch inside the bottle.
Start by cking the OD oil bottle as that is the easy one.
Sence it did not sound off at home I would ck the temp switch.
Did you ck all gauges when it happened?
Don

[tech62571]

Spot on, it was the OD fluid a little low. didn't realize it had a sensor.
I checked the outside of the OD, I don't see anything leaking.
Any place else I should check? I assume it should not leak or be low?

[mmwjr]

Originally Posted by tech62571

Spot on, it was the OD fluid a little low. didn't realize it had a sensor.
I checked the outside of the OD, I don't see anything leaking.
Any place else I should check? I assume it should not leak or be low?

This is what I would have thought. At rest and getting onto plane in the water the bow is slightly higher so the reservoir float ends up being a little lower, once on plane it levels out. On the trailer it’s fairly level.

When was the lube last changed? Common for the level to drop with in a month as some air gets into the system. Any signs of lube in the bilge? Leaks can occur at the transom fitting. When the lube is changed look for signs of water in it which would indicate a bad seal. We’re need gaskets used on the drain and vent plug when the lube was changed?

[donald]

I 2nd what Mike said.
Don

[tech62571]

Thank you

Lube Oil was changed last December.
not sure if new gaskets were used. but i pulled the bottom one quickly in may to make sure there was no water in it.
I will have to check at the transom fitting.

[tech62571]

Hose connections were dry, nothing appears to be leaking
is there a common place they might leak?

[mmwjr]

Originally Posted by tech62571

Hose connections were dry, nothing appears to be leaking
is there a common place they might leak?

Internally right at the transom inner plate. External prop shaft, drain/vent plugs, shift shaft, upper drive shaft.

[tech62571]

Thank you!

[shrew]

Also take a look inside the large bellows U-Joint Bellows. There is a seal there that is supposed to push drive lube to lubricate the seal, then suck it back in again. It doesn't aways suck it all back in. Sometimes when you change that bellow you'll find a lot of lube caked in there.

Between burping and the condition I just described, I'd expect to have to top off the lube resevoir at least once a season after doing a seasonal lube change.

[tech62571]

Great info. thank you. I took it out last weekend and it stayed at the line.