Chapter 4 Fuel and exhaust systems
4-19
12.18 Pull out the pin holding the 12.19 Remove the throttle return
choke unloader diaphragm in alignment
spring mount
12.20b Withdraw the choke shaft 12.21a Unhook the secondary
return spring
12.21~ Lift the choke mechanism
housing away from the carburetor body
12.21d Separate the spacer and O-ring
from the housing
12.20a Pull out the choke unloader
diaphragm and linkage
12.2lb Remove the two choke
mechanism housing screws
____ - :” .-.-.-,
A- . . . . _ ,
c--v
12.22a Remove the top cover screws
21 Unhook the secondary return spring from the choke mechanism
housing (see illustration). Remove thetwoscrews (see illustration) and
lift the choke mechanism housing away from the carburetor body (see il-
lustration). Separate the spacer and small O-ring from the housing (see
illustration).
22 Remove the four remaining screws (see illustration) and lift the top
cover off the carburetor. Be careful not to bend or otherwise damage the
float mechanism (see illustration).
23 Before removing the float, invert the top cover and measure the dis-
tance from the float seam to the gasket surface of the top cover (see illus-
tration). Record the measurement for future reference.
24 Carefullyslideoutthepivotpinandseparatethefloatandinletneedle
from the top cover (see illustration). Slip the needle out of its mount on
the float (see illustration). Unscrew and remove the inlet needle seat and
washer (see illustration).
25 Remove the top cover gasket from the carburetor body (see illustra-
tion).
26 Hold your finger over the accelerator pump discharge plunger bore
(see illustration). Tip the carburetor upside down and let the steel ball
from the anti-overflow mechanism in the bottom of the float bowl fall out
(see illustration). Next, remove the accelerator pump steel check ball
and weight (see illustration). Draw a simple diagram showing the sizes
(stamped on the jets) and the locations of the primary and secondary main
jets, then unscrew and remove them from the carburetor body (see illus-
trations).
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