Thanks for the tip, $24 for an OS carb is a bargain. I know the 4B and 4BK carbs have a smaller diameter outside mount diameter (FSR days) than the newer SF/FX/AX carbs. I'm unfamiliar with this heli configuration. I guess it's micrometer time and pulling
a carb out to see if it's .39 (10mm) too. This is cheaper than a Perry carb. Worth a try, but not on my Tigres, they tune just fine.
I need a replacement for my ASP engine.