[C320-list] Transmission oil change

[Martin Rosenberg]

Over the years, Yanmar has changed the spec for engine lube between 30W and
15W40 but has never varied from 30W for the trans. I used to find it easier
when I only had to store one weight but I personally believe that the 15W40
is better for the engine.
Martin Rosenberg

On Thu, Apr 14, 2016 at 4:36 PM, Daryl Hunt <drhunt at rochester.rr.com> wrote:

> I'm about to change the transmission gear oil on my Yanmar 3GM30F (Japan)
> diesel.  I changed the crankcase oil before haulout last fall with Shell
> Rotella T 15W40.  The Yanmar Operators Manual says to use the same oil for
> the gear case as the crankcase.  However, my PO left a quart of CD 30 oil
> labeled "For Transmission" and a Yanmar (Japan) manual "Maintenance of
> Pleasureboat Diesel Engine - GM Series" aboard specifies CD 10W15 for
> engine and CD 30 for gear oil.  Since Believe's engine is the Japan
> version, I'm leaning toward the CD 30 oil.   Make sense?
> --
> /fair winds,//
> //Daryl Hunt//
> //C320 #660 "Believe"//
> //Rochester, NY - Lake Ontario /
>
>
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