Well today I got the prop hub,prop washer and bolt.As soon as I pulled it out of the box I knew it would bolt up to the Poulan fly.I also noticed that the hub pilot hole was larger than the poulan flank nut shaft.I thought to myself "this is going to be a cinch".I don't have a machine shop nor do I have free access to one.Everything Im doing here is by hand with high speed drill and the mighty dremel.I needed to make a bushing to fit the fly nut with clearence for heat expansion when fitted to t-6 alloy.Steel expands alot where alloy expands a little if any..003 is minamal for this app.I started by tapping out the two holed for 1/4-20.I would have went with 1/4-28 but 20 has a better and larger thread.Fine threads usually dont last long in cast aluminum.After tapping I set the hub on the fly and the holes were dead on,perfect,like the were made for the Poulan.I then started with the bushing with a small piece of t-6 alloy.I get all my metal from wick aircraft supply,best prices and fast shipping.I marked the center and drilled with 1/4 bit.This next step is actually not recomended unless you know what your doing.I use a prop balancer in the dremel to spin the plate but dont allow the max rpm's, when starting have the bit right at the metal to start cutting.I use 1/2 inch carbon drill bit to do the cutting.This works perfect and Iv done it before cutting downsomething,can't remember.
Anyway at least put on your safty glasses and were gloves just to be safe,also try to keep the pets away.My cat was actually supervizing this job.LOL.I cut the outter diameter down pretty quick,when starting to get close to the right size stop and check the fit more often.I ended up making two because the first was about .020 to small.After getting the outter the snug fit in the pilot hole I then removed it from the balancer.I installed a bolt the same size as prop bolt through the backside of the hub,so that it was threads on the prop side.This part goes in the high speed drill.I then installed the bushing in the fly side in the pilot hole.Now were doing the inner side of the bushing and using a smaller diameter bit,1/4 worked for me.Make sure its a carbon and not a high speed cheapo,they will burn and dull easy.when getting close to the right size,I put a carbide bit in the dremel and at the same time spin it with the drill and cut it even with the carbide spinning in the dremel.when this fits slightly loose on the nut shaft your done.I used .003 clearence for this app.The Zenoah hub is very light because its hollow and being hollow actually makes it stronger than solid hubs.Heres the pics and I will gladly answer any questions.This hub works and looks great.