$250
1970 40 HP Johnston outboard weighs 145 lbs.
1965 to 1970
50:1
1970
The 1970 model, 9.9hp Johnson outboard requires a 50:1 fuel to oil ratio. This is roughly, one pint of 2 cycle oil, to six gallons of fuel.
I have the same engine different serial # but my engine is a 1970
The 1970 model, 60 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The Johnson Seahorse outboard motor Model 9R-70C was manufactured in 1970. The "R" in the model designation indicates it is a 9 horsepower, and the "70" refers to the year of production. This model is part of the Johnson Seahorse series, which were popular for their reliability and performance during that era.
We used 30 weight Shell Rotella T oil.
In the early 1970's, when you could still get good gasoline, outboard compression in the 180-190 psi range was common. If your 65 hp Johnson is running in the 100-150 psi range, this would be acceptable, and the engine should still perform well on todays fuel. The important thing to note with compression readings however, is that the difference between the highest and lowest reading, is no more than 15 psi. One more note, avoid fuels containing alcohol if at all possible.l
Jack Johnson - 1970 is rated/received certificates of: USA:GP
1970