Webra TruTurn Adapter Bushing Problem

[Lee Davis]

This is a new one I haven't heard of before.  If you don't have any luck you can always return the engine to us and we'll check it out.  Look hard at the bushings, though.  It's difficult to imagine that out of all the Webra engines there's one that's oversized at the crank end.  Anything's possible though.

One likely solution just occured to me.  Try heating the bushing in the oven or with a small torch.  The aluminum will expand quite a bit and I'll bet it will then slip over the crank.  It's probably not off more than a couple of thousandths.

Lee Davis
Piedmont Models
http://www.piedmontmodels.com/
  ----- Original Message ----- 
  From: Keith Black 
  To: discussion at nsrca.org 
  Sent: Wednesday, January 08, 2003 12:56 AM
  Subject: Help: Webra TruTurn Adapter Bushing Problem


  I have a new Webra 1.45 Aero X and I'm trying to mount a 3 1/4" TruTurn FAI spinner on it. The adapter kit that is listed for this engine on both TruTurn's and Piedmont's web page is TT-0825-A which contains an 8mm bushing. 

  The bushing fits over the threaded part of the crankshaft, but will not fit over the unthreaded base of the crankshaft. 

  I tried another 8mm bushing that I have to make sure that the bushing with the adapter kit wasn't incorrect and neither bushing will fit. 

  Using a caliper the base of the crankshaft measures about 8.1 to 8.2 mm.

  Has anyone else had this problem? Any suggested solutions?

  Thanks,
  Keith Black
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