!0 HP yanmar diesel

[dirtdobber]

Swampfox, for what its worth I'm running a Yanmar 3 cyl diesel. I sourced a stub shaft from an old John Deere mower (thanks ebay), as Yanmar is used in lots of JD small machines. For $100, a local tool and die shop turned the shaft down from 1-3/8 or so to 1", cut it to length, milled a 1/4 inch keyway, and bored/tapped the 3/8 fine thread needed to hold the clutch in place. I was pleasantly surprised.

[allwheeldrive]

How do you "gear down" these things? I am assuming the sprocket size?

Depends on the machine. Some have a jack-shaft with a single sprocket on either side before it gets to the main chain assembly. While not a 6x6 my Coot has a short chain from the transmission to the drive shaft you can really go crazy changing sprockets out anywhere from 4:1 to 1:4 if need be guessing by how much room is around the ones I have in it right now.

[swampfox2020]

does anyone know if the stub shaft off of an Exmark mower will work on the kubota z482 flywheel? It looks like it would be a direct bolt on.

[swampfox2020]

The 482 was great, but would lug down with three or four adults in the machine.
The clutch is a Salsbury 780; common on a lot of amphibs. Whipper machined the stub shaft for me, so it was perfect. He doesn't frequent the site any more, but any machine shop could probably fashion one for you. Others on this site have made their own with good results as well.

what size shaft does the Salsbury clutch require? The stub shaft for an Exmark mower from a Kubota looks like it would be perfect. I might buy it and see if the shaft was to large I could turn it down at work

[Don]

1" diameter with a 1/4" key

[swampfox2020]

I have the swamp fox in the shop. I have pulled the engine and transmission out of it. in the process of replacing the chains and bearings. I want to remove the frame and paint it, then raptor line the swamp fox fiberglass. I am tying to figure out how to make the z482 kubota work. I am hung up on a stub shaft. I know exmark mowers makes a stub shaft that will bolt to this flywheel, but I have no idea what the shaft diameter is. I think it could be a 1 1/8" shaft. Do they make salisbury clutches that take a 1 1/8" shaft? I also am curious about the t20 transmission as well. It looks like it has gear oil in it. I think I will either rebuild it or have it rebuilt. I want it to be reliable once installed. I think richards relics rebuilds these, and I might just have them do it.

[swampfox2020]

I am also surprised no one makes a 1" shaft for this little engine. I still find that hard to believe.

[allwheeldrive]

Is the problem your shaft is too large OD? It could always be turned down on a Lathe.