I got the new power plant and set it in place, and it fit’s great. It’s a 6.5 hp engine, with 3/4″ output shaft. I put a 10-tooth sprocket on it because it will be direct drive constantly spinning the 2 counter-rotating shafts. No clutch or anything is needed, as that is handled by engaging the belts downstream, just like a riding lawn mower.
I also welded in a structure to hold the idler sprocket (which is needed to make the chain drive the shaft sprockets in opposite directions, as explained in a previous post). The idler sprocket has it’s own 5/8″ bearing, so I just need a short 5/8″ bolt and it’s ready to go.
Now it’s time to make permanent motor mounts, run the chain, and install the drive belts.