OS 140 EFI cut out at full throttle

[Steve & Cindy Kessler]

I put my original OS pipe back in the plane and all is well again.  Due to shortening of the ES pipe length to match the OS pipe exhaust outlet, I only had 18.5" from the flange face to the first baffle.  On my new Smaragd, I'll be able to set the ES pipe with a 21.5" length to the baffle.  It should run better.
  ----- Original Message ----- 
  From: Steve & Cindy Kessler 
  To: discussion at nsrca.org 
  Sent: Monday, May 12, 2003 6:44 PM
  Subject: OS 140 EFI cut out at full throttle


  After around 250 flights on my OS 140 EFI, I had to install new SS bearings.  At that time I replaced the OS/Hatori pipe with the ES 140L90 pipe.  This pipe is longer than the OS so I shortened the header around 3" to fit in the Smaragd.  Now the header is only 5" long before it connects to the ES pipe. The ES pipe has more power than the OS pipe.  The only problem is that the engine sometimes cuts out at full throttle.  It dies at full throttle, mostly when coming out the the bottom half loop and accelerating in the pull-push-push humpty'sbump full roll up.  Sometimes it dies in straight and level flight if I accelerate too quickly.  I have recently put RTV on the throttle throat and on the case o-ring area, thinking I had an air leak.  The idle is great.  Could this problem be related on having the ES pipe length too short?  Otherwise for over a year I had no problems with the engine when mated with the OS pipe.

  Thanks for any words of wisdom.

  Steve Kessler
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20030515/c120227b/attachment.html