The starter on my RTV 850 (2018 model) just crapped out. Finally got it off (really hard to get to) and it is stamped with Mitsuba SM17. It is trashed on the inside. Searched on internet, lots of bad info on compatible starters. Found one on Amazon that looks correct so I ordered it. Might not fit but I refuse to pay $600+ from dealer until I at least try a couple different ones. I'll let you know if it actually fits. BTW, I do not like my Kubota RTV 850. Between the jumpy throttle (absolutely makes it worthless for spraying or any low speed work), seals around propeller shaft falling off, general maintenance issues, it is not a good machine.