I am chasing an oil pressure problem. I have connected a separate oil pressure gauge to eliminate any pressure gauge issues. The oil pressure issue does not show up unless the engine is run for about an hour under a load. The oil pressure starts fluctuating and eventually falls to zero. The engine temp does not overheat or really change at any point once the engine is warmed up. I have changed oil viscosity, oil filter, oil sludge remover and nothing seems to effect it. Once the pressure drops to zero there is no valve chatter suggesting a loss internally of oil pressure. If I pull the throttle back to idle the oil pressure returns to normal. The engine can run all day below 3000 rpm and will not drop. The drop occurs only above 3000 rpm. Some have suggested oil pump or pick up tube problem.... the problem is, to check those items off the engine would have to be removed from the boat. Not enough room to lift and pull the pan and the engine compartment deck also has to be removed. The boat is a 2001 Tiara 2900 open. Any suggestions would be appreciated.
Oil Pressure Drop Video
Oil Pressure Gauge is the Top Left Gauge. Oil Temp is the Top Second From Right Gauge
Thanks,
Tony
Oil Pressure Drop Video
Oil Pressure Gauge is the Top Left Gauge. Oil Temp is the Top Second From Right Gauge
Thanks,
Tony