WM 90 Repair Sub Systems
wc_tx000390gb.fm 79
9.7 Carburetor Inspection
See Graphic: wc_gr001920
9.7.1 Clean the carburetor and components with an appropriate solvent.
9.7.2 Check the gaskets for any deformation and/or damage. Replace any
deformed or damaged gaskets.
9.7.3 Make sure that the pump diaphragm (11) is not damaged. Also make
sure that the inlet valve and outlet valve are flat and not bent.
9.7.4 Make sure that the metering diaphragm (6) is not damaged and that
the plate is not bent.
9.7.5 Check the throttle shaft (19) and the choke shaft (20) for smooth
operation.
9.7.6 Check the inlet screen (1) for dirt. If the screen is dirty, wash it and blow
it out with compressed air.
9.7.7 Check the inlet valve for abnormal wearing. If the inlet valve is worn,
replace it.
9.8 Carburetor Reassembly
See Graphic: wc_gr001920
9.8.1 Mount the inlet screen (1) to the carburetor body.
9.8.2 Mount the inlet needle (2), metering lever spring (3), metering lever (4),
and other related components.
9.8.3 Mount, in this order, the metering gasket (5), metering diaphragm, (6),
and cover (7). Tighten the four cover screws.
9.8.4 Next, mount in this order, the pump diaphragm (11), pump gasket (12),
and pump cover (13). Tighten the pump cover screw.
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