Prop Spacer on a 11-AC without the McDowell Starter

Mark Lipp · Post by **Mark Lipp** » Fri Nov 14, 2008 20:41

We are restoring a 1946 11-AC, using a Sensenich wood prop on a flanged A-65 engine. We will not be using the McDowell starter. The Aeronca manual calls for a spacer, PN 2-1017, but we can't find one. Univair does not stock it. Does anyone know where I might find one?

Mark

Post by **joea** » Fri Nov 14, 2008 21:58

Mark,

Is this a taper or flange crankshaft?

Joe

skyking3286 · Post by **skyking3286** » Sat Nov 15, 2008 00:05

Looks like Todd has the drawing on Aeronca.com... but it's in bad enough shape to need some prep and clean up work. I probably need one too for my Chief, since the spinner is contacting the cowling by about an 1/8".
I had a spacer in the box of parts which was almost a 1/2" thick, but the part was really corroded.

Post by **joea** » Sat Nov 15, 2008 00:09

Remember that you can put a washer as a spacer on the engine mounts and move the engine forwards a bit to give clearance if needed.

Mark Lipp · Post by **Mark Lipp** » Sat Nov 15, 2008 11:25

This is a flanged engine. I'd rather not move the entire engine forward but might have to do that if we can't find a spacer.

Mark

Jody Wittmeyer · Post by **Jody Wittmeyer** » Sat Nov 15, 2008 13:12

If you give us a part number or drawing number, we may have a better drawing. My spacer is @ 1/2 " thick

colie85857 · Post by **colie85857** » Sat Nov 15, 2008 16:09

BOB CARR in maryland has the spacers that he supplys with his chief spinners as needed.

Mark Lipp · Post by **Mark Lipp** » Sat Nov 15, 2008 16:28

Great! Thanks for the tip. I bought our spinner from Bob so will give him a call.

Mark

Mark Lipp · Post by **Mark Lipp** » Sat Nov 15, 2008 16:40

I just talked to Bob Carr. He said that the spacer (PN 2-1017) is NOT required if you have a Bob Carr spinner and backplate and it is a flanged engine. However, a 1/2 inch spacer IS required if you have a tapered shaft engine.

Thanks for the replys. They helped solve my problem!

Mark

MikeB · Post by **MikeB** » Sat Nov 15, 2008 17:28

One other thing: it seems the 'new' engine mount rubbers that are presently available seem to 'squish' down a lot more than the original mounts. The part number escapes me and I'm not in the shop right now, but I went through this with Wag Aero a few years ago and they assured me the composition was the same. However, after they've been in service for a short time they all seem to crack and wallow out. If you take them off, they don't look half bad so I can't explain it but I'm quite sure you lose at least 1/4" from the original mounts which, of course, brings the spinner and prop back closer to the nose bowl and this is being properly torqued to specs.

It appears it's common no matter which supplier you get them from unless you happen to get some 'old stock' mounts.

Mike Berg

Paul Agaliotis · Post by **Paul Agaliotis** » Mon Nov 17, 2008 07:55

Mark,
The drawing has the spacer thickness as .250 and the holes are sized for the taper hub .377.
Paul