I worked on the 1872/364 snowblower combination today. I think I have enough of the mounting brackets worked out that I can turn it on and make sure it works before I completely finish everything. I took the starter off and wanted to rebuild it, only to discover that it was a fairly new replacement starter, which to my surprise and disappointment, is NOT rebuildable, unlike the older replacement and original starters. The bendix is retained by a crimped sleeve instead of a nut, so it can't be removed to clean and lube the bendix. It also has a very exposed slip clutch that probably keeps the gear from getting destroyed. There is no way to relube the bendix worm without getting stuff on the slip clutch, so now it slips too easily, and the starter doesn't want to engage half the time.
I guess I'll have to pull if off again and try a different starter if I can't get the lube worn off of the slip clutch.