I bolted down the Predator 212cc today and did the 3 hour break-in. When I put the pulley on I used the 2 set screws. My question is this. When I removed the pulley from the old Tecumseh H50 it had two spots on the crankshaft for the set screws to sit into. On the new Predator it does NOT have these two cut-outs for the set screws to sit into. Will these two set screws hold the pulley on for the next 50 years, or should I add a 5/16x24x1 into the crankshaft. I did try adding this to the crankshaft but the belt cover would not fit because of the hex head was in the way! Thanks guys!