Retired Educator
★★★★★ Legendary Member
I have a Mercury 75hp outboard, about 20 years old. Yesterday the low oil indicator went off while trolling. It was not low on oil but I added some anyway. That did not help. While trolling the motor would at times run very rough and actually sounded like it had no oil mixed. Decided to head to boat ramp and when I increased the rpm's the motor ran smoothly as normal and buzzer quit. Decided to stop and fish a little more and same issue. Ran rough and buzzer went off. Increase rpm's and runs smooth and quiet.
Any suggestions as to a possible problem. How does the injection system work? Is it possible that a pump or something is bad and produces enough oil at higher rpm's or a screen or filter that is partly blocked. Looking for any suggestions.
Thanks
Any suggestions as to a possible problem. How does the injection system work? Is it possible that a pump or something is bad and produces enough oil at higher rpm's or a screen or filter that is partly blocked. Looking for any suggestions.
Thanks