[NSRCA-discussion] OS160FX/Perry Oscillator pump

[Chris Moon]

Jack,  
You want the VP30 pump. Not the VP20 oscillating pump. That's primarily 
made for 4 cycle use and won't pump enough to feed the OS 1.60.  The 
1.60 with the VP30 pump is a powerful and very reliable combination.  I 
have not heard of anyone successfully using the oscillating pump with 
this engine.

Chris

Jack Keiser wrote:
> 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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