Just toying with the idea but would anyone know if a Honda GX620 v-twin engine will fit as a replacement engine for the B&S 305cc engine on a Simplicity 928?
From a cursory eyeball inspection and comparing engine dimensions, it seems plausible. The dimensional specs for the engine depth is a bit of a concern. The Honda is approx. 1" deeper at 15.3" but the spec sheet didn't say if that included the output shaft length. The B&S engine depth is 14.3 less shaft. The other dimension indicate that the Honda will be shorter and narrower than the Briggs. Which is hard to understand considering the Honda is a V-twin???? But the numbers say it is narrower. Not that width really matters. I've looked at the engine location on the Simplicity and think the exhaust from the Honda cylinders will require the fabrication of header pipes into a Y and routed to one side to allow for a muffler to be placed on the side of the machine. Not sure about the engine mounting bolt hole pattern or the height of the power take off shaft either. Another thing is the power take off shaft on the B&S is 3/4" dia. 2-5/16 long. The Honda is 1" and very close to the same length. I'll have to bore out the pulley to fit the Honda shaft or find a suitable replacement with a 1" bore.
Anyone out there ever do something like this?
If you're wondering why, well, just to see how far 20 h.p. will throw snow mostly.
This message was modified Mar 12, 2010 by borat
