RCU Forums - View Single Post - OS 91 FX problem
View Single Post
Old 01-08-2011 | 07:15 AM
  #15  
w8ye's Avatar
w8ye
My Feedback: (16)
 
Joined: Dec 2001
Posts: 37,576
Received 11 Likes on 10 Posts
From: Shelby, OH
Default RE: OS 91 FX problem

Jaka,
While what you say may be true, the original OS 91 FX had a well documented problem with the cast on design of the rear needle valve transfering heat to the fuel and causing lean running.

This caused OS to redesign the rear needle valve with a less conductive design.