Johnson 75

green52mgtd

Recruit
Joined
Feb 26, 2005
Messages
4
purchased 63 Thompson wood boat with Johnson 75 OB. What is the oil to gas misture ratioo, or how do I find out
 

bareden

Cadet
Joined
Feb 26, 2005
Messages
7
Re: Johnson 75

more then likely it will be 50:1 ratio about 6 ounces of oil per gallon ... but im not sure..
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Johnson 75

50:1 ratio is 16 oz of oil in 6 gallons of fuel or 13 oz in 5 gallons. At 6 oz per gallon you would not be able see where you were going due to the smoke. Mixture ratios are provided on the label of most two stroke oil containers.
 

Todd Humphreys

Petty Officer 3rd Class
Joined
May 12, 2004
Messages
81
Re: Johnson 75

By the way what year is your motor????I have a 1982 Johnny 75hp and 50:1 is the recommended gas to oil ratio.
 

Solittle

Fleet Admiral
Joined
Apr 28, 2002
Messages
7,518
Re: Johnson 75

If that is a 63 motor you need confirm the 50:1 as there is a point where 24:1 was required but I don't remember which year.
 
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