Mercury optimax 135 continuing alarm

[tomdem]

Hello,
I have a problem with a Mercury optimax 135 horse power outboard motor from 2005.
When accelerating from zero, we have a continuing alarm and los of power. When coming back to neutral and again accelerating the alarm disappears. We do a lot of waterski with the boat, so it is pretty annoying. Reading the manual it is something with the oil or overheating from the motor. Does anyone have an idea what could cause the alarm?
Many thanks 🙏

[985crabs]

Be very careful with that. I had an Optimax that exhibited similar behaviors. 3 trips to the mechanic and many hundreds of $$$s later, it threw a rod.

It doesn't make that noise anymore.

[gnrphil]

Take a look at the oil reservoir cap on the motor, FIL had a Mercury and that was causing his alarm to go off.