OS32 Tuning
 

What should the needle settings be on the OS32? I can't get this thing to start for my life!

RE: OS32 Tuning
 

on the os 32's I have found the optimal power setting at about 200 ft to be about 1.25 turns with the ace muffler. The low end you should start from the factory setting.

RE: OS32 Tuning
 

check to make sure the carb barrel is open eough for the engine to start also.

RE: OS32 Tuning
 

here is a piece from the os32 manual good luck.[img][/img]

RE: OS32 Tuning
 

Casey,

I agree with da-man. 1.25 - 1.5 turns out on the main and factory on the low end. I set the main needle to 2.5 turns out to begin with and leaned down to 2 turns like I would on one of my airplane engines. The performance was terrible. The thing would barely pull itself off the ground and anything above 3/4 collective, forget it. I started leaning, and leaning, and leaning and finally the engine began to perform more as expected. It runs pretty warm but I think this is more a poor fan/shroud design on the heli than the mixture setting.

If you've lost the factory low end you can follow the procedure posted above or use the John Beech method.
Stick a t-pin in the carb throat and close the throttle to "pinch" the pin in place. This should closely resemble idle position.
Attach a piece of fuel tubing to the carb and blow into the tubing.
While you're blowing turn the low end adjustment to clockwise until you can no longer blow any air through the tubing and then back off counter-clockwise just till the air begins to flow again then open maybe a quarter turn more. This might be a tad rich but it should get you close enough for the engine to start.