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February 14, 2018 at 3:03 am
#71024
I’ve seen where OMC on some of their 50/1 motors suggest 25/1 if the motor is going to be operated at it’s upper RPM range for extended periods of time. I have a 1969 25hp Johnson and run it at 25/1 because it is always run hard on a 10ft./140lb. Feather Craft Fire Fly. I also read in a 1990 70 hp service manual to go from 50/0 to 25/1 for severe duty.