My starter has a serious case of rust. For reliability I want to replace it with a new one. I have seen elsewhere that the M-25 is really a Kubota tractor engine. Some have suggested that it is a Kubota D-850. But a search of the Kubota site yields no results for a D-850. Could they have updated the designation? And can someone tell me the new nomenclature for this engine? My local Kubota dealer is a bit mystified by my description and the D-850 thing.