All of our new parts are aftermarket replacements. Compatible with Minneapolis Moline Tractor(s) G850, G940. Replaces Minneapolis Moline OEM nos 221600R, 221600S. Compatible with Oliver Tractor(s) 1650 (Engine s/n 187586-earlier), 1750, 1755, 1800 (Engine s/n 124396-later), 1850, 1855. Replaces Oliver OEM nos 158850AV, 159320AS, 158850A, 159320ASV, 157722A. Compatible with Waukesha Engine(s) D283. All States Ag Parts Item No.