1975 johnson 85 fuel mixture

stic88

Petty Officer 1st Class
Joined
Aug 15, 2010
Messages
326
need to ask a question. what is the fuel to oil ratio for a 1975 johnson 85? i have asked before but got 1 answer. wanted at least two or three just in case. thanks for the help.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: 1975 johnson 85 fuel mixture

It is 50:1. All Johnsons from 1964-up are 50:1. Except the four strokes and oil-injected ones. So believe it already.
 

joey nathan

Petty Officer 2nd Class
Joined
Mar 17, 2009
Messages
185
Re: 1975 johnson 85 fuel mixture

If you're using the 6+ gallon tanks like I am for a '75 70HP Evinrude, the 50:1 ratio works out to a pint of two cycle oil to six gallons of gasoline.

Exact values are 2.56 ounces oil to each gallon (128 ounces).
6 gallons times 2.56 oz per gallon equals 15.36 ounces for the full tank.

Hope that helps...
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: 1975 johnson 85 fuel mixture

If you're using the 6+ gallon tanks like I am for a '75 70HP Evinrude, the 50:1 ratio works out to a pint of two cycle oil to six gallons of gasoline.

Exact values are 2.56 ounces oil to each gallon (128 ounces).
6 gallons times 2.56 oz per gallon equals 15.36 ounces for the full tank.

Hope that helps...

Sure. But nobody goes to that extreme. Dump in a pint can of oil and fill 'er up with gas. Or 1/3 of your wife's measuring cup to a gallon. Sneak the cup into the dishwasher before she finds out.
 

jimdd810

Chief Petty Officer
Joined
Mar 18, 2006
Messages
532
Re: 1975 johnson 85 fuel mixture

Sure. But nobody goes to that extreme. Dump in a pint can of oil and fill 'er up with gas. Or 1/3 of your wife's measuring cup to a gallon. Sneak the cup into the dishwasher before she finds out.

Ive done that and she found out. It was her brand new pyrex glass one. She was mad as h$%&. So now every time I go out to my shop she strip searches me. Oh wait thats not a bad thing is it lol.
 

Al-53

Chief Petty Officer
Joined
Jul 17, 2008
Messages
491
Re: 1975 johnson 85 fuel mixture

Buy one of the measure bottles....and your wife will love you....it works good for the outboard..the chainsaws and wackers...lol



Al
 

EricJRW

Chief Petty Officer
Joined
Feb 3, 2010
Messages
488
Re: 1975 johnson 85 fuel mixture

Buy one of the measure bottles....and your wife will love you....it works good for the outboard..the chainsaws and wackers...lol



Al

Have one and love it... I fill three 5-gallon gas cans at a time, and pour my oil from a 1-gallon jug. Fill the measure bottle, pour into gas can, fill gas can with gas. Done!

Oh, and I use 50:1! <---- That's #5 BTW.
 

stic88

Petty Officer 1st Class
Joined
Aug 15, 2010
Messages
326
Re: 1975 johnson 85 fuel mixture

ok ok ok i think i found out what i needed to know. but that is 50:1 right......lol thanks guys just didnt want to do aany damage to the engine before i have a chance to get the boat on the water.
 
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