I believe Satoh is (or was) owned by Mitsubishi. As far as I know they no longer import. TractorData.com Satoh Buck S47 tractor information I have a Mitsubishi tractor and have received much support from Valley Power in Roanoke, VA: Valley Power I have also scored parts from eBay on the rare occasion they are required.
Ok after 2 days of "googling" I found the numbers. Turns out it is a Satoh S470, 2 wheel drive (kinda figured that out on my own) I even got it running which brings me to my next problem. It starts and runs but only at one speed. I'm guessing but about 1000 rpm. the speed control lever moves but has no effect on the rpm. I'm guessing this tractor has sat for a long time as there was black tar in the fuel tank.
Any help with a K3B 0.849L injector pump would be greatly appreciated.
Make sure the air filter is clean and the air passage is not blocked - that tractor will get real picky without enough air. How's the fuel flow from the tank? Have the fuel lines been properly bled of air? The throttle control should move linkage to the pump - ensure that it does. Valley Power may have a manual available for your tractor. If you don't see it on the website give them a call. It's a small outfit and they will talk with you in a knowledgeable manner.