Oil/fuel Question

[Roberthill]

1957 Johnson 35 hp , what oil to gas ratio ? What grade of gas?(regular mid or high?)

 

[racerone]

The mix was 24:1 on those.-----You will get 10 opinions from 5 people on what you should run today.

 

[kbait]

Nonoxy fuel at 24/1

 

[Chris1956]

That motor was designed to run on regular leaded fuel and non-detergent SAE 30 motor oil. Whereas you can still probably find non-detergent SAE 30 motor oil, I would recommend TCW-III 2 cycle oil, as it will have much less carbon build up. Regular unleaded gasoline mixed 24::1 with oil is just fine. 24::1 mix is 1 qt oil per 6 gallons gasoline.

 

[mike_i]

What Chris1956 said.

 

[oldboat1]

Use a rich oil ratio (24:1 as indicated), and a lean air mix. Initial idle mix 1 1/2 open from lightly closed. H.s about 1/2 open initially, with final adjustment at or near wot. (then go back and readjust idle mix). The oil ratio is critical to engine life. Air mix is critical to performance.