Oil mixture

[Zimm]

I just picked up an old (78) evinrude 25 horse and was wondering what mixture everyone uses. I don't want to replace plugs all fall when I am duck hunting. Thanks.
Zimm

[SportFishin']

50:1 has been working for me just fine.

I have the same Motor & Year. I have found in the fall to just run higher 91 octane gas & the plugs don't foul when it's really cold.

Hope this Helps?

Chris