oil/fuel for '55 johnson outboard

CATransplant

CATransplant

Admiral
Joined
Feb 26, 2005
Messages
6,319
Re: oil/fuel for '55 johnson outboard

24:1 for your '55. One quart per 6 gal's of gas.
 
V

Virginiaboater

Cadet
Joined
Jun 27, 2005
Messages
9
Re: oil/fuel for '55 johnson outboard

Could this be right? 24:1? I have a '78 55HP Johnson, and I've been running 40:1 for a couple of years (or at least my father did when he owned it). I'm not trying to be funny or anything. It's possible that I am putting too much oil in the gas. So, can anyone confirm this? Motor runs fine on 40:1, but would 24:1 make it run that much better?<br /><br />Waiting in anticipation.
 
S

sprouticus

Petty Officer 1st Class
Joined
May 12, 2005
Messages
208
Re: oil/fuel for '55 johnson outboard

from what i've read here.......the older boats use 24:1 and anything made after 1970 or so seem to be 50:1. you can't wreck anything running at 40:1, but you may foul plugs more, and your max speed will decrease. I run my 77 70hp at 50:1 and I think thats what you should be using.
 
jimmbo

jimmbo

Supreme Mariner
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May 24, 2004
Messages
12,961
Re: oil/fuel for '55 johnson outboard

1964 was the year Evinrude and Johnson switched to 50:1
 
bubbakat

bubbakat

Captain
Joined
Oct 29, 2002
Messages
3,110
Re: oil/fuel for '55 johnson outboard

Virginiaboater You should be useing 50:1 mix for your motor. now as for the orignal question at the top I would have to ask if this person is running a 1955 motor or a 55 h/p motor.<br />Anything pre 1963 should use 24:1 mix
 
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