Expert: Everett Peacock - 8/3/2008

Question
Temp/Oil alarm will start beeping at different times during operation...oil tanks are full and motor is "peeing" strongly...I have not had any problems with engine at all (Merc 150 hp EFI - 1998) but this alarm started going nuts today...any suggestions?  Thanks

Answer
it sounds like the oil pump is failing....run premixed fuel until you find the problem....if you take the oil pump off the engine there is a coupling there...it should turn when you turn the motor over..if not then the problem is in the coupler...run pre mix fuel  one pint to six gallons of gas....if you don't it could blow up the engine...