by RoyM » Sun Feb 16, 2014 2:21 pm
You need to carefully measure the crankshaft length, diameter, and taper if not a keyed design. Some chipper engines had odd ball pto's that are no longer available. You will also need to shim the engine, the crankshaft center line of new ohv's are about 1" lower than the old L- heads.
Briggs and Stratton MST