[NSRCA-discussion] OS160FX/Perry Oscillator pump

[Jack Keiser]

Does anyone know if the Perry Oscillator pump has enough capacity to feed an OS 160 FX?  Although the engine seems to run OK, I'm concerned because the needle valve seems to be open too far (about 3 1/2 turns) and requires large changes, like one complete turn, to have any noticeable affect on the mixture setting. 

The engine will maintain full throtttle RPM (about 8400 with an APC 17-10) without sagging (on the ground) and speeds up a little before quiting when you pinch the fuel line. I haven't flown it yet but I'm concerned that it may go lean in flight when the engine unloads. 

Any thughts before I fry an engine?

Jack Keiser
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