Fuel Oil Mixture '64 Evinrude 5.5 HP

Adamski

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May 18, 2010
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Hello,
I just bought a 1964 Evinrude Fisherman 5.5 HP motor, can anyone tell me the fuel/oil mixture it requires? Thanks in advance.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Fuel Oil Mixture '64 Evinrude 5.5 HP

That is the year that OMC came out with their 50:1 oil. The spec for your motor was 24:1. Or, 50:1 but ONLY if Evinrude or Johnson 50:1 oil was used. Now, bear in mind that the 50:1 oil in those days is not the same formula as the present stuff. Bottom line: The subject always starts a big arguement. Be safe and use 24:1. The little piddling amount of extra oil isn't going to break anyone. If you had a gas guzzling big motor, I might say differently.
 

Vic.S

Rear Admiral
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May 4, 2004
Messages
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Re: Fuel Oil Mixture '64 Evinrude 5.5 HP

I think the crankshaft bearings are plain bushes , not needle rollers, so the extra oil in a 24:1 mix would probably be a good thing.
 

1946Zephyr

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Oct 21, 2008
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Re: Fuel Oil Mixture '64 Evinrude 5.5 HP

I think the crankshaft bearings are plain bushes , not needle rollers, so the extra oil in a 24:1 mix would probably be a good thing.

The 5 1/2's went to needle bearing crank and rods in 1961 and newer, so you're okay. The earlier ones, I would definately be careful about the oil mix, because they were infact bushing type crank and rods.:cool:
 

Adamski

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Re: Fuel Oil Mixture '64 Evinrude 5.5 HP

Wow, thanks for the quick response! Much appreciated. I found the serial number on the motor today, maybe it helps 54028 C417151
Thanks again!
 

Vic.S

Rear Admiral
Joined
May 4, 2004
Messages
4,690
Re: Fuel Oil Mixture '64 Evinrude 5.5 HP

That will be 5402B I think you will find. That confirms it as a 1964 5.5
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Fuel Oil Mixture '64 Evinrude 5.5 HP

Yes. Actually, the older ones ran 16:1, so it isn't like you are dumping in too much oil or anything.
 
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