Minnesota Classic Glastron Forum

General Category => General Discussion => Topic started by: andyt on July 20, 2026, 04:39:51 PM

Title: OMC 400 electric shift outdrive gear oil
Post by: andyt on July 20, 2026, 04:39:51 PM

Hi folks,

The 400 series outdrive is supposed to be filled with Type C gear oil...what is everybody using as a substitute?

Title: Re: OMC 400 electric shift outdrive gear oil
Post by: thedeuceman on July 22, 2026, 11:01:11 AM

we dont get all that much traffic here these days, but i have not seen any posts on one of these drives (not nearly as common as Mercruiser)
it looks like sierra still sells it,
from AI
"Type C gear oil is a unique, thin-viscosity lubricant primarily used in older outboards and stern drives with electric or hydro-electric shift systems (e.g., vintage Johnson and Evinrude motors)."
sorry that all i got, Joe

Title: Re: OMC 400 electric shift outdrive gear oil
Post by: andyt on July 23, 2026, 01:32:54 PM

Quote from: thedeuceman on July 22, 2026, 11:01:11 AM

we dont get all that much traffic here these days, but i have not seen any posts on one of these drives (not nearly as common as Mercruiser)
it looks like sierra still sells it,
from AI
"Type C gear oil is a unique, thin-viscosity lubricant primarily used in older outboards and stern drives with electric or hydro-electric shift systems (e.g., vintage Johnson and Evinrude motors)."
sorry that all i got, Joe

Thanks Joe,

I did the same search and ordered the Sierra stuff through Amazon.

I'd love to find an OMC enthusiast forum like the ones we have for Saabs, they are very busy and very helpful.