I've got a Walbro WA226 with no hi-speed adjustment screw. Unfortunately, it seems that the issue is in the high-speed jet. Adjusting the low screw can set me up so long as the throttle is at full, but in order to run it at idle, I have to screw the low screw back in a full turn.
How can I go about adjusting it? Would I have to bend the tab that connects to the metering diaphragm?