Onan MJA Series Service Manual page 39

37
FUEL SYSTEM
8. Remove the noload adjusting needle.
9. Remove the load adjusting needle and spring.
10. Remove the throttle plate screws and the plate and pull out the
throttle shaft.
11.
Remove the choke plate screws and plate and pull out the choke
shaft.
3.2.5.3 Cleaning and Repair. ­
To clean the carburetor, soak
all components thoroughly in a
good carburetor cleaner, fol­
lowing the cleaner manufac­
turer's instructions. Be sure
all carbon is cleaned from the
carburetor bore, especially in
the area of the throttle valve.
Blowout the passages with
compressed air. If possible,
avoid using wire to clean out
the passages.
Check the adjusting needles
and nozzle for damage. If the
float is loaded with fuel or
damaged, replace it. The
float should fit freely on its
pin without binding. Invert
the c.arburetor body and mea ­
sure the float level, Fig
3.2.K.
If necessary, bend the small lip that the intake valve rides on to adjust
float level.
Check the choke and throttle shafts for excessive side play and replace
if necessary. Don't remove the coating on the throttle shaft. This is
" teflon, used to reduce wear and friction between the shaft and carbure ­
tor body.
3.2.5.4 Assembly and Installation. ­
1. Install the throttle shaft and valve, using new screws and lockwash­
ers. Install as shown in Fig 3.2.H and with bevel mated to the car­
buretor body. On valve plates marked with the letter "C", install
with mark on side toward idle port when viewed from flange end of
carburetor. To center the valve, back off the stop screw, close the
THIS DIMENSION
SHOUL.D BE
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lin
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64
FIG 3.2.K - MEASURING CARBURETOR
FLOAT LEVEL