This documentation is saying shaft length is measured from the engine flange mounting face to the end of the crank. The only length options for a 1-1/8" diameter crank according to the chart below are 3-1/4" (3" usable before the shoulder) and 4" so I'm still baffled how SEW is advertising 3-5/8" for shaft length on their Onan repower kit. Since it is longer than 3-1/4", it has to be a 4" model but they won't tell me if the shaft is cut down or they are factoring the spacers into their measurement.Hi FastEddie,
Check out this link. The crankshaft length does not include the spacer.
Replacing your engine? Learn how to find your direct engine replacement specifications, including vertical and horizontal shaft engines!www.briggsandstratton.com
I'm trying to avoid that scenario if I can help it by purchasing the correct engine. I don't want to buy a 3" shaft engine and find out it stops 3/4 of the way through the clutch or buy a 4" shaft engine and find out it will hang the clutch out an extra inch since I need this thing as compact as possible.Tip. If you have to shorten a shaft that is already drilled or at least spotted in the center, drill and tap to the needed finish depth BEFORE cutting off the excess. I'd do it on the mill or drill press to reduce the chance of error. However you choose to do it, the existing hole will help guide the drill and tap so you get it straight and on center.