Steve Waterman wrote: Hi Bud,

I have a 56 horsepower Yanmar diesel in the Heron and we don't know who made the transmission. Do you have any ideas as to what transmission people used for the Yanmar engines? This is a shot in the dark, as usual.

Thanks,

Steve

  

Bob Meade wrote:

Bob Meade wrote:

Steve Waterman wrote: Hi Bud,

I have a 56 horsepower Yanmar diesel in the Heron and we don't know who made the transmission. Do you have any ideas as to what transmission people used for the Yanmar engines? This is a shot in the dark, as usual.

Thanks,

Steve

  

Steve,

Most Yanmars of the size we use have either a KBW 20 or a KBW21. This is or was Yanmar's standard transmission. Kanzaki-Carl Hurth KBW 20 or  KBW 21.

 If your engine is a 4JHE or a 4JHTE then the transmission is a KBW 20

 If your engine is a 4JH-HTE or a 4JH-DTE then the transmission should be a KBW21

For basic maintenace, oil for both is Dexron ATF, I use a turkey baster to suck out the old thru the fill cap, if it has been a long time you might want to have it tested for metal bits, 

These tranny's are noisy so if you are worried about rattle at low  rpm this is normal and should go away at 1,000+ rpm or so- 

Hope this helps, lemmee know if you need more info.

Bob on Treasure

OOOPS! Even tho it says quite clearly ASK BUD on the port  side of the site I'm still gettin used to the new site' sooo - Bud if you gotta correction you can set us both straight, thanks Bob

Hi Bob,

Thanks a lot. I have some Amsoil Synthetic ATF that I can use. I have also heard that straight SAE 30 works, but I think the ATF would be better. My information is also that it doesn't need to be changed for a long time, like a thousand hours. I'm putting Amsoil Synthetic Diesel Marine oil in the engine when I have warmed it up enough to get the other stuff out. SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil I used to use that in my 180 Cummins in my lobster boat. Had a bypass filter on there, so never changed the oil, just had it analyzed and changed the filters and made up what was lost in the filters.
Steve