reddingnative
New member
I have a 2010 Tohatsu 8HP outboard. I have been getting an intermittent low oil pressure light followed by a slight drop on RPM. The light goes out after 5 seconds or so and the motor runs fine again. I followed the troubelshooting steps in the service manual and currently have a oil pressure test gauge attached to the motor. I went out on the river and oil pressure is about 30 in gear at 960 rpm. Pressure is above 50 at around 1800 rpm. I have the motor mounted on a drift boat, so I never max out the rpm's. In keeping an eye on the oil pressure it is constant at whatever rpm I am running at. That was two days ago. Went out again yesterday and monitored oil pressure, no change, but the low oil pressure light came on briefly and went off once. Went out again today and low oil pressure light came on and went off while motoring. Oil pressure remained constant.
There is no reference in the manual for next step to determine cause of low oil pressure light coming on when oil pressure is good. Any help or advice would be appreciated.
There is no reference in the manual for next step to determine cause of low oil pressure light coming on when oil pressure is good. Any help or advice would be appreciated.