G'Day all,

I'm planning on running in my OS 46 AX today and have done a fair bit of reading on running in and tuning these engines. The 1 thing i can't find is where exactly do you adjust the low speed needle valve if i need to?

My best guess is that is the tiny flat head screw that is set inside the bolt that holds the throttle arm on, is that right?

I don't want to go playing with anything that i'm not sure how it works and the manual doesn't really show you, it just says how to tune with it not which screw it is.

Feeling a bit stupid here but any assistance would be greatly appreciated

Stix