2004 mercury 225 4 stroke engine alarm comes on at 5000rpms

[proline09]

I brought my boat in for service two weeks ago with this problem of the engine alarm coming on at 5000rpms then goes to reduced ower...back off the thottle and it seems normal untill about 5-10mins of running time then have the same problem......not over heating new water pump temp gage normal range and good flow......service mgr says that the oil pump relief valve is at fault.....two weeks(today) later i get a phone call from service mgr and he said the new oil pump did not fix my motor.....never had a problem with this mtr always been maintained...any ideas of what it could be? Was told that the next step was for a total tear down of motor I only have 300hrs on the motor... any ideas?

 

[proline09]

Re: 2004 mercury 225 4 stroke engine alarm comes on at 5000rpms

check with service center today and was told that the engine has to be torn all done to find possible sourse of an oil blockage...was told that with new oil pump oil pressure shoud be 3psi but was told that my pressure stays at 80- 90 psi and then drops causing the alarm to go off...never had a problem with the motor untill now...of course my warranty just ended less then 60 days ago....any good techs out there