Home › Forum › Ask A Member › 1967 3 hp Johnson compared to a 1955 3 hp › Reply To: 1967 3 hp Johnson compared to a 1955 3 hp
June 28, 2026 at 1:00 pm
#323171
That’s a good question! If it were my motor I wouldn’t run it on anything leaner than 16:1 regardless of what the manual says.
The manufacturers were under a lot of pressure to get the oil ratios more “environmentally accommodating” . The 1967 motor is still a bushings only motor.
Like in the 80’s when they started saying 100:1. They reneged on that pretty quickly but not before having to warrranty a lot of powerheads damaged by lack of oil.
Lets see what some of the OMC Pros have to say.