Generac 86640 - Manual (Page 63)

Section 5.3- CARBURETOR
Removal
Remove carburetor air intake components as necessary
to gain access to the carburetor. Disconnect the carburetor-
governor link. Disconnect fuel line. Remove carburetor, car­
buretor adapter and gaskets.
Disassembly
See Figure 5 on next page. Disassemble the carburetor
as follows:
1. Remove two screws and lockwashers, then remove FUEL
INLET PLATE and GASKET.
2. Remove two screws and washerts, then remove CHOKE
SOLENOID ASSY.
3. Remove four screws and washers, then remove FLOAT
BOWL COVER along with FLOAT BOWL GASKET, FLOAT,
FLOAT SHAFT, SPfflNG, FUEL VALVE AND SEAT ASSY.
4. Remove FLOAT SHAFT, SPRING, FUEL VALVE and
FLOAT.
5. Remove FLOAT BOWL GASKET.
6. Remove SEAT ASSY.
7. Remove two CHOKE PLATE SCREWS, then remove
CHOKE PLATE.
8. If necessary for replacement, remove FUEL SOLENOID
and seal.
9. Remove IDLE ADJUSTING NEEDLE & SPRING.
10. Clean all parts in clean gasoline.
Reassembly
Reassemble all parts in the reverse order of disassem­
bly. During the reassembly process, install new parts from
carburetor repair kit. Pay close attention to the following:
D Open throttle plate slightly for idle speed.
D Set the Idle adjusting needle 3/4 turn open.
With float bowl cover inverted and float bowl gasket
installed, set float level 0.125 inch (3.175mm) from the float
bowl gasket (see Figure 1).
Tighten air intake mounting screws. Make sure the throt­
tle shaft rotates freely. Tighten the FUEL SOLENOID to 70
inch-pounds.
Insert short leg of CHOKE SHAFT SPRING into small
hole in CHOKE SHAFT (Figure 2). Wind SPRING 1-1/2 turns
counterclockwise, anchor on retaining screw boss.
Installation
Install casket, adapter, gasket and carburetor. Retain
with socket head machine screws.
Automatic Choke Adjustment
Loosen CHOKE SOLENOID adjusting screws and adjust
choke position so that, with the solenoid pulled in (energized),
the choke piate is closed. With choke plate closed, tighten the
adjusting screws. Then, with solenoid extended, bend tip of
the bi-metal until choke plate is about 1/8 inch from vertical
and towards the closed position.