oil to gas ratio

[monte brown]

Do anyone know the ratio of oil to gas for a 1994 Johnson 9.9 HP Sailmaster Outboard. Any help would be greatly appreciated.Sincerely,Monte Brown

 

[Gerard]

50:1

I have a '92 and it takes 50:1.

 

[Bill]

25:1 vs 50:1

do the first tank with 25:1 just to get things lubed up, rest of the season go with 50:1

 

[Jeff Peltier]

opinions

My opinion of heavey oil mixtures is mostly negative. Extra oil fouls plugs and pollutes lakes. These same engines, when rigged with oil injectors run a 100 to 1 mixture at virtually all power settings under 3/4 throttle. That is why, with modern oils, most manufacturers recommend a conservative 50 to 1. Yamaha was recommending 100 to 1 for their 15 HP outboard, which is the most aggressive I have seen with a standard 2 cycle.Jeff Peltier

 

[steven]

50:1 first 3 times, then 25:1 after that

50:1 first 3 times, then 25:1 after thatthat's what i've been told by marine centers

 

[David]

Ratio

Steven, I think you have got the procedure reversed.

 

[Bill Murray]

reverse!

On the exact same engine - My OMC dealer told me to run 25:1 (a pretty rich mixture) for the first 3 tankfuls, then 50:1 afterwards.My old Evinrude 9.9 sailmaster (1974)was 50:1 also.