you might want to check the throttle linkage clearance to the front inside wall of the mount. I needed an indentation for linkage to go to full. You could always drill a hole on the other side for the choke arm access. Seem I read somewhere that some Walbro chokes have an extra fuel channel that opens when carb is closed and a detent for a ball. Check the model diagram at : http://wem.walbro.com/walbro/family2.asp