OS 1.40 Dies at Throttle Up

[wgalligan]

I had to lean the low end on mine after about 10 flights.  Havent touched it since then.  
Wayne
    -----Original Message-----
    From: ronlock <ronlock at comcast.net>
    To: discussion at nsrca.org <discussion at nsrca.org>
    Date: Sunday, May 11, 2003 12:02 PM
    Subject: OS 1.40 Dies at Throttle Up
    
    
    Hi  all,
     
    I have an OS 1.40 with only 15  flights on it.  Break in  and first 15  flights
    over last couple of months were fine.   
     
    Yesterday first two flights were fine. Carried plane to take off position for
    third flight, engine went rich and died at throttle up.   Re-started and
    got same result.   Changed to new OS-F plug, and went to lighter
    load prop.   Same result.  Set high  speed needle to near peak.
    Same result.   Been using same jug of 15% nitro fuel for all flights.
    Pipe is Bolly 26 inches piston face to baffel- same as first 15 flights.
    Ive checked fuel lines, tank, remote needle, carb,  for leaks, and for
    flow -  all seems OK.    
     
    I discovered I  can blow air thru the pump in  the direction of fuel flow,  
    but not backwards.    Anyone  know, is that normal?
     
    Other suggestions?  -  What changed between 15th and attempt at
    16th flight?
     
    Thanks,   Ron Lockhart
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