Right oil ratio for Chrysler 4hp 42H91?

jonduck

Cadet
Joined
Jun 2, 2010
Messages
6
I've got a model 42H91 Chrysler 4hp outboard. All labels have been removed and it's painted black so I'm not sure what the proper mix ratio is.
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: Right oil ratio for Chrysler 4hp 42H91?

If it is water cooled, then the correct mix is 50 to 1. If the engine has fins on it like a lawnmower engine, (3,5 and 3.6) it is air cooled (The leg is always water cooled) and uses a 25 to 1 mix.
 
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