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1.
Starter plunger
8.
Washer
2.
Cable assembly
g.
Main adjusting screw
3.
Plunger
spring
10.
Slow adjusting spring
4
Plunger
cap
11
Slow adjusting screw
5.
Cap
12.
O-ring
15.
Lock nut
16.
Screw
17.
Spring
18.
Throttle
screw
19
Nut
ENGINE -
Carburetor
Tightening torque:
Pilot jet
1.45 ft-Ibs. (0 .2 m-kg.)
Valve seat screw
0.723 ft-Ibs. (0.1
m-kg.)
Diaphragm arm screw
0 .723 ft-Ibs. (0.1 m-kg.)
1
.
Main adjuster screw
2.
Pilot screw
Fig. 2-30
6.
Washer
13
Pilot jet
(#
85)
20.
Adjuster
throttle
(4) Do not remove the throttle shaft and the throttle
butterfly.
7.
Spring
14.
Washer
21.
Rod screw
Fig. 2-29
(3) Remove the slow adjusting screw and slow adjusting
screw spring as an assembly, using a slotted-head
screwdriver.
Remove the main adjusting
screw
and spring washer
using a slotted-head screwdriver or by hand.
Do not remove the two a -rings from the main ad-
justing
screw groove.
Using a slotted-head screwdriver (small), remove the
pilot
jet and
a-ring.
On the right-hand carburetor, the slow adjusting
screw, main adjusting screw and pilot jet are in-
stalled on
the right side of the
carburetor,
but on the
left-hand
carburetor,
the pilot jet is positioned on the
right side of the carburetor.
Using the 12-mm. open-end wrench, loosen the
plunger cap, and remove the cable assembly, plunger
spring and starter plunger
.
Straighten the lock washer, and loosen the lock nut
using the 10-mm. open-end wrench.
Then loosen
the primary venturi holding screw, and remove the
primary venturi and secondary venturi from inside.
(Fig.
2-30)
2-5-3.
Cleaning and Inspection (GPX338F)
(1) Cleaning
Clean the carburetor with carburetor cleaner or suit-
able solvent.
Remove all rubber components from
the carburetor parts
(such
as diaphragms and gas-
kets) to prevent the solvent from attaching the rub-
ber.
(2) Inspection
-
17-
1) Check the throttle link mechanism, throttle butterfly
and other moving parts for damage.
If faulty, replace the carburetor
body.
2) Check the carburetor body and pump body, and
-
if
cracked or holed, replace.
3) Check the threaded portion of the stop screw, and
if
damaged, replace.
4) Check the main diaphragm for center plate position
and any other defect
.
Replace,
if
any defect is
found.
5) Check the chek seat valve for
cracks
and holes, re-
place if damaged.
6) Check the lever pin, diaphragm arm, valve seat, and
needle valve for wear or breakage
.
If excessively
worn or broken, replace.
7) Check the diaphragm spring for fatigue.
If it fa-
tigued excessively replace.
8) Check the pump
diaphragm.
If bent or holed, re-
place.
9) Check the diaphragm spring for fatigue.
If it
is
fa-
tigued excessively, replace.
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