DISASSEMBLY

SEPARATION OF THROTTLE AND FUEL BOWL BODIES

1. Remove hex head plug (7) and filter screen (if used) from side of throttle body, using 7/16” wrench.
2. Remove four bowl to body screw and lockwasher assemblies (28), using a screwdriver.
3. Raise throttle body slightly and separate gasket from fuel bowl flange, then lift off throttle body assembly being careful not to damage float assembly.

DISASSEMBLY OF THROTTLE BODY

1. Press screwdriver against float axle (17) at slotted side of float hinge bracket and force axle through slotted side of bracket, then remove axle with fingers from opposite side of bracket and remove float assembly (18).
2. Remove fuel valve needle (part of 20), bowl to body gasket (21) and venturi (54).
3. Remove fuel valve seat (20) and fiber washer (19).
4. Remove idle jet (16) from machined surface of throttle body, using a small screwdriver.
5. Remove idle adjusting needle (5) and friction spring (4) from side of throttle body.
6. Unscrew throttle stop screw (15) until threaded end of screw is flush with throttle lever.
7. Close throttle and scribe across throttle body and throttle levers as a guide to correct re-assembly of parts.
8. File off riveted or peened end of throttle plate screws, being careful not to damage throttle plate or throttle body bore.
9. Remove throttle plate screws (2) and throttle plate (3); then remove throttle shaft and lever assembly (14).
10. To remove throttle shaft packing and packing retainer from throttle shaft hole, screw a 5/16” fine thread taper tap into packing retainer (10) until firmly seated. Insert long punch or rod in opposite shaft hole and drive punch against end of tap until retainer is free of throttle body. Remove tap and repeat operation for removal of packing and retainer from opposite shaft hole.

NOTE: Do not disassemble throttle plate, throttle shaft and stop lever assembly, throttle packings and packing retainers from throttle body unless throttle shaft is bent or otherwise damaged or unless there is damage or visible wear to other components of throttle assembly. Do not remove throttle shaft bushings unless inspection indicates replacement is necessary.

DISASSEMBLY OF FUEL BOWL BODY

1. Remove main jet adjustment assembly (24) and fiber washer (25), using a 1/2” wrench.

NOTE: Some models have main passage plug (23) in place of main jet adjustment.

1. Remove hex drain plug (29) from bottom of fuel bowl.
2. Remove main jet (26) and fiber washer (27).
3. Remove main discharge jet (52) and fiber washer (51) from center of large opening in machined surface of fuel bowl.
4. Remove well vent jet (53) from center of large opening in machined surface of fuel bowl, using a small screwdriver.
5. Scribe across air intake body section, choke bracket and choke lever as a guide to correct re-assembly of parts, then remove choke lever spring (42) from choke lever and choke bracket.
6. Remove choke shaft nut (40) and lockwasher (41), then remove choke lever.
7. Remove choke bracket screws (33) and lockwashers (32) and remove choke bracket (31).
8. Remove choke shaft hole plug (50) from opposite side of air intake.
9. Remove choke plate screws (49), choke plate (48) and choke shaft (37) from air intake section.
10. To remove choke shaft packing and packing retainer from choke shaft holes, screw a 5/16” fine thread taper tap into packing retainer (30) until firmly seated. Then insert long punch or rod in opposite shaft hole and drive punch against end of tap until retainer is free of air intake body. Remove tap from retainer.
11. On models which include choke lever (34), remove taper pin (35) and then remove lever.

NOTE: Do not disassemble choke assembly bracket, choke levers, shaft and choke plate unless there is damage to any of above parts or damage to any of the other component parts of the assembly.

REASSEMBLY

REMOVAL AND REPLACEMENT OF THROTTLE SHAFT BUSHINGS

NOTE: Do not remove throttle shaft bushings unless new shaft bushings are available along with the proper bushing driver and line reamer.