whty8911
New Member
My boss has a 2002 Sea Ray 360 I believe. i do know the motors are 2 - 496 ci Mercruisers. One engine has had repeated oil issues for awhile now. The initial problem would occur if you throttled the motor over 3500 rpms. The oil pressure would drop from 45-50psi to 20psi and the alarm would sound. After a lot of back and forth the motor was pulled and a machine shop found excessive tolerances in the crank bearings. The motor was rebuild with new bearings and a few other things. The motor primed fine at first but after running the boat the motor is now worse off then before. 5psi oil pressure is at idle and may or may not jump to 20 psi before the system shuts the motor off. The gauge and the sending unit have been replaced nurmerous times and the motor is now running on a mechanical gauge. The oil cooler system has been bypassed to eliminate that as an issue. And no external leaks could be found. The low pressure was no there immediately but took some driving to get it to occur but is now consistent. Any ideas.