Johnson 18 HP Motor FD15

[photograph4]

I just got a (1961 i belie

I just got a (1961 i believe) Johnson FD-15 18 HP boat motor and am unsure as the gas and oil mixture ratio
does any one know what it is?!
thanks!

 

[joereeves]

"You can safely use the 50/1 m

"You can safely use the 50/1 mixture on that engine as the powerhead incorporates bearings on all moving components..... mains, rods, wrist pins, etc. FD-15 is indeed a 1961 18hp Johnson."

 

[kmhoos]

According to my Johnson FD15 owners manual, pg 8, the correct mixture is 24:1. The oil can be SAE30 motor oil. If you would like a copy of the manual, email me at [email protected].

 

[racerone]

They likely figured it out 15 years ago !!