Dave,

I've got a 63FZ that I bought in October 2002, I'd say it has about 2 gallons thru it (counting test stand break in) of Magnum Heli Mix (30/20 synth), and brand new OS F turning a 13/6 APC at 10,200 at about the same elevation you're at.


Anyhow Here's the problem:

I haven't really had the engine running relaibly at the field yet....yet in my yard It runs like a top... ANyhow, I'll start it up, adjust the main needle, and it's just running fantastic...smooth as silk. Then It just stops, like you're car when you turn off the key. I think it happens more around idle to 1/4 throttle... But it's also done it at half throtle and higher.

The tank is well pressurized and holds the pressure, all the filters look new still, I've tried a few new OS F's and no change.

I'm not sure if this is a factor but I did turn in the regulator screw about a half turn because the engine would load up and run rough as it transitioned from a little under 1/4 throttle to 1/2 throttle.

I'm pretty much stumped!

Thanks