1964 johnson seahorse 5.5hp fuel mix ratio

gammo24

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Jan 15, 2008
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i have a johnson seahorse 5.5hp engine code CD-21A does anyone know the correct fuel mix ratio i should be running on , it will be mineral oil not synthetic im using. thanks.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
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51,019
Re: 1964 johnson seahorse 5.5hp fuel mix ratio

there is some controversy, as to which to run 24/1 or 50/1. my manual states 50/1, twc3 outboard motor oil, as long as it is rated tcw3, petrol or synthenic is fine.
 

F_R

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Joined
Jul 7, 2006
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28,195
Re: 1964 johnson seahorse 5.5hp fuel mix ratio

1964 is the year that OMC introduced their 50:1 oil
 
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