USAfixTM - Repair Guide (RG) - Master Email RG
- REPLACING THE FUEL REGULATOR ADJUSTMENT
 Level of Difficulty - EASY  Estimated Completion Time - 15 minutes
PIONEER - PE420BU

Tools Required
Tool 
Crescent wrench
Nut driver-metric 7mm
Screwdriver-phillips
Teflon tape
Wrench-7/16 in
Wrench-Allen standard 3/32 in

Parts Required


Step Procedure & Parts & Tools
1 REMOVE THE SCREWS FROM THE TOP COVER.
Screwdriver-phillips

2 LIFT THE TOP COVER OFF TO EXPOSE THE FUEL REGULATOR AND ADJUSTMENT.

3 UNPLUG THE WIRE FROM THE FUEL LOCKOFF. THIS WIRE IS LOCATED IN FRONT OF THE BATTERY TRAY.

4 REMOVE THE VAC HOSE AND THE FUEL HOSE FROM THE REGULATOR.

5 REMOVE THE 2 BOLTS HOLDING THE REGULATOR TO THE BATTERY TRAY. REMOVE THE REGULATOR, LOCKOFF AND HOSE FROM MACHINE.
Wrench-7/16 in

6 PLACE THE REGULATOR ASSEMBLY IN A VICE IF AVAILABLE.

7 REMOVE THE BRASS EXTENSION ON THE FUEL ADJUSTMENT.
Crescent wrench

8 PUSH THE LOCKOFF AND FUEL HOSE OUT OF THE WAY WHICH WILL ALLOW ROOM TO REMOVE THE OLD FUEL ADJUSTMENT.

9 REMOVE THE OLD FUEL ADJUSTMENT FROM THE MACHINE.
Crescent wrench

10 APPLY TEFLON PLUMBERS TAPE TO THE FITTINGS OF THE NEW FUEL ADJUSTMENT.
Teflon tape

11 SCREW IN NEW FUEL ADJUSTMENT INTO THE REGULATOR AND TIGHTEN. NOTE: MAKE SURE TO POINT THE BRASS FITTING ON THE FUEL ADJUSTMENT IN THE SAME DIRECTION AS THE OLD ONE SO THE FUEL HOSE CAN BE ATTACHED.
Crescent wrench

12 LOOSEN THE SMALL BLACK SET SCREW ON THE NEW FUEL ADJUSTMENT.
Wrench-Allen standard 3/32 in

13 TURN THE TRIANGLE SHAPED ADJUSTMENT OUT COUNTER CLOCKWISE SEVERAL TURNS UNTIL ABOUT HALF WAY UP.
Nut driver-metric 7mm

14 REINSTALL THE 2 BOLTS THAT HOLD THE FUEL REGULATOR ASSEMBLY TO THE BATTERY TRAY.
Wrench-7/16 in

15 REVERSE STEPS 3 AND 4 TO REASSEMBLE THE MACHINE.

16 TRY STARTING THE ENGINE. IF THE ENGINE DOESN'T START WELL AFTER A FEW ATTEMPTS, TURN OUT THE TRIANGLE ADJUSTMENT ON THE FUEL ADJUSTMENT COUNTER CLOCKWISE A FEW TURNS. REPEAT STEP UNTIL THE ENGINE STARTS AND RUNS WELL ON IDLE.

17 TURN THE SET SCREW ON THE FUEL ADJUSTMENT UNTIL TIGHT.
Wrench-Allen standard 3/32 in

18 REINSTALL THE TOP COVER AND TIGHTEN THE SCREWS.
Screwdriver-phillips