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Old 09-12-2012, 09:06 AM
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airraptor
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Default RE: OS 120 AX Problem ?
Yes the pitts mufflers do not supply enough pressure to feed the carb. three things to do if want to run the pitts muffler

1.Block off one exhaust tube or pinch both of them closed 1/2 way with pliers

2. run a 30 dollar perry pump

3. run a smaller carb


all the AX engines not like to run hot.

I am very well versed in the OS 120 AX engine. If you have any questions let me know. The 120 is the strongest one out there and it is also the lightest. It is even stronger than a Jett 120.
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