Constant beep when i accelerate

[Turpin82]

I have a 2006 115hp mercury optimax. When I accelerate to 5rpm a constant beep occurs. Can someone please help me out.

 

[Chris1956]

That is normally an overheat alarm. When was last time waterpump was replaced? Thermostats? Poppit valve?

 

[Turpin82]

I just replaced the thermostat last week. I haven't replaced the water pump or the poppit valve.

 

[Turpin82]

It also looks like I have a oil leak somewhere along the lower propeller unit. Not sure from where though. Any ideas.

 

[Chris1956]

Thermostat cools at idle and slightly above. Poppit then takes over.

If you have had the motor from new, 15 years is a long time for the original waterpump. If you bought it used, it could still be 15 years old. It makes sense to replace the impeller, wearplate and 2 gaskets. If the base or pump top look worn or melted, replace them as well.

 

[Turpin82]

I will replace all. Any idea on the oil leak??

 

[Texasmark]

Optimax is fuel injected 2 stroke isn't it? 2 strokes burn oil with the fuel. Oily residue can become visible in the exhaust circuit, especially if you do a lot of trolling, and in cold weather...but its not cold right now.....so that's out. Only other oil is in the LU gearbox and it would have to have a leak in the drive shaft seal, prop shaft seal, shift shaft seal or drain and vent screw seals. Milky/yellowish oil and or water droplets would be present in the LU rather than Merc blue-black oil if you had a leak in the LU gearbox casting.

 

[Turpin82]

It is just the mercury Blue black oil. I guess after I I change the impeller and the water pump it might clear up.

 

[Turpin82]

Thank you for all of your help.