YS 1.20 AC

[Grow Pattern]

Jerry,
          It could be fuel build up in the air chamber. Make sure the tiny hole that in the crankcase is not clogged. The check valve that runs from the chamber to the crankcase feed into a very small diameter hole. When it gets blocked eth engine runs but fuel accumulates in the lip caused by where the inlet valve hole is ion the chamber. The drain lets it go back into eth casing.

When the engine is inverted all is well. When it transitions to the engine-upright position at a low throttle setting it puts out the fire on the plug.

Regards,

Eric.
  ----- Original Message ----- 
  From: jjvoth 
  To: discussion at nsrca.org 
  Sent: Friday, May 20, 2005 2:17 PM
  Subject: YS 1.20 AC


  Anyone have any ideas why this engine quits running  when exiting the triangle loop or the full roll after the half inside loop in the Masters pattern.
  I can't remember ever having this engine quit since it was new. I've checked the fuel lines, replaced the pickup line in the tank, changed the diaphragm, checked the fuel passages in the regulator and carb, changed plugs, reset the idle screw and cleaned the filter. It runs fine with plenty of power (for an AC) and it doesn't quit on the above maneuvers every time.

  Any help would be appreciated.

  Jerry
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