Hi all;
I'm having trouble with the Tru-Turn spinner on my Fuji 32EI.

In order to get the spinner to work, I had to order a special bolt from Tower that is tapped in the end to accept the Tru Turn spinner bolt. This special bolt has a 10mm shoulder that is longer than the thickness of my prop hub, (Top Flite 18 X 8, wood). Even with the washer that goes under the bolt, the shoulder still protrudes beyond the hub. Also, the washer supplied with the engine does not have a 10mm hole to fit this special bolt and I guess I'll have to drill it out. If I do that and this whole thing doesn't work, the original washer will have much too large a hole for the original bolt.

Can I use more than one washer under the special bolt to suck the shoulder up into the prop hub? If so, where can I get washers with a 10mm hole or do I go to the hardware store and make my own from what they have?

I hate to trash the Tru-Turn, but maybe the simplest thing is to just buy a GP plastic spinner that doesn't require special adapter bolts. (BTW, this bolt cost $34!!!).

Thanks all!

Yes you can stack and hardware stores generally stock metric hardware. More in larger sizes than smaller, so the 10mm stuff is usually easy to find.

Your thoughts of using a plastic prop may be a good idea. Save the Tru Turn for another project with a better fit.

I don't know if this will help with your problem, but I used a Tru-Turn spinner adaptor #TT-0835-A on my 32EI. It utilizes a bushing instead of a shoulder on the screw. I got mine from Tower, item #TRUQ4035, $9.99 + $3.99 shipping. It requires a #10-32 spinner screw instead of the one supplied with the engine, but you can pick that up at your local hardware store. It works fine with an APC prop with a hub about 9/16" thick.