I am planning on replacing my engine on my tiller that was a Tecumseh H60 but I have to buy another brand since they went out of business.all I can find with the same shaft is a Briggs & Stratton 1150 Series Horizontal OHV Engine 250cc, 3/4in. x 2 5/16in. Shaft, Model# 15T212-0223-F8 but the problem is I don't care for B&S and have never had good luck with any of there engines so I stopped buying their brand years ago. I found a Honda engine but the shaft is 3/4in. x 2 7/16in. Shaft and I guess my question is can I grind the Honda shaft down too 5/16in the same as my old one I am replacing and expect for it to run correctly .