Ok…where to start. I am so frustrated at this point I don’t know what to do….and I hate “giving up”.

My Heli:

Raptor 50
O.S. 50 Hyper
O.S. #8 glow plug
Standard tank with a header tank
Hayes black clunk line

So a while ago, while flying the engine simply cut off at about 30 feet up. I did a semi-auto and only broke the landing gear. At the time I had a standard O.S 50 sx-h (non-hyper). I fixed the landing gear and while I was at it, installed a Throttle Jockey Pro Governor and from this point on the heli has never been the same.

The problem: It starts fine, but as soon as I get to about ¼ throttle, the engine cuts off immediately.

Things I’ve done:
- replaced glow plug numerous times
- replaced ALL fuel lines
- replaced ALL fuel clunk lines
- messed with the richness/leanness to no avail
- replaced the main tank
- and last night I freaking replaced the engine with a O.S. 50 Hyper

Where I stand now: After replacing the engine with another one (O.S. 50 Hyper), I’m STILL having this issue! So now I can eliminate the engine and messing with the needle valve, etc. But I’m out of things to try now! The ONLY things I haven’t replaced are the muffler (but it appears to be fine), and the header tank (but I’ve removed it for testing and still had this issue). I tried it without the governor in the loop by plugging the throttle servo directly into the receiver with the same result.

What the heck else can I do? As you can see, I’ve replaced just about everything! I miss my Raptor!

Thanks!
Skarn