4
90
Nikki Carburetor
Models 351700, 351400, 380700, 380400
Check Throttle, Choke Shaft and Body For Wear
NOTE:
The measurement in Step 1 is taken with the
carburetor off of the intake manifold.
1. Lay carburetor on 1/4” (6.35 mm) raised flat
surface (1). Check throttle and choke shaft
clearance with a feeler gauge (2) as shown in
Fig. 58
.
Throttle shaft and choke shaft clearance must not
exceed
0.010” (0.25 mm)
.
Fig. 58
NOTE:
The inspection in Step 2 is performed after
the carburetor has been disassembled.
2. Inspect throttle shaft and choke shaft for wear
(3). Replace if worn,
Fig. 59
.
Fig. 59
Replace either shaft if worn.
Replace the carburetor of the body is worn or if either
shaft clearance exceeds
0.010” (0.25 mm)
when a
new shaft is used.
Disassemble
NOTE:
The carburetors used on vertical
crankshaft Models 351700 and 380700,
and horizontal crankshaft Models 351400
and 380400 are similar enough that the
disassembly and reassembly procedures
can be considered the same. The only
significant differences in the carburetors
are the location of the idle mixture screws
and the fixed main jet orifice sizes.
1. Remove anti-afterfire solenoid (1) with washer
(2),
Fig. 60
.
2. Remove fixed main jet plugs (3) with washers (4).
Fig. 60
3. Remove fixed main jets (7, 8),
Fig. 61
.
NOTE:
The carburetor is equipped with a different
size fixed main jet for each cylinder. The
carburetor is marked
L
(6) for the #1 cylinder
and
R
(5) for the #2 cylinder.
The carburetor is marked in the upper body
near the choke plate and the lower body
near the main jet plugs. See
Fig. 61
.
