5. FUEL SYSTEM MXU 300/250 Pull out the float pin, then remove float and Float float valve. Inspect the float for deformation or damage. Float Valve Float Pin Throttle Stop Screw Slow Jet Remove the main jet, needle jet holder, and needle jet. Remove the slow jet. Remove the air screw and throttle stop screw. Air Screw Main Jet CAUTIONS! Throttle Stop Screw Spring · Be careful not to damage the jets and jet holder when removing them. · Before removal, turn the throttle stop screw and air screw in and count the number of turns until they seat lightly and then make a note of this. · Do not force the screw against its seat to avoid seat damage. · Be sure to install the O-ring in the reverse order of removal. Air Screw Spring Washer O-ring 5-11