Re: servo motor ?
Can you turn the pulley by hand?
The mark on the valve should be pointing forward normally and you should be able to turn it clockwise 90 degrees to point up and anti-clockwise 90 degrees to point down.
Witht the engine running it should point forward at idle and at 3000rpm it should turn to point up.
At 8000rpm it should point down.
"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder