Re-Assembly Of The Carburetor - MTD AC3 Professional Shop Manual

Re-assembly of the carburetor

Needle valve
seat
Figure 5.25
The lines show the
paths of the different
ports
Filter screen
Figure 5.26
Primer pump body
Figure 5.27
Primer bulb
Fuel System And Carburetor
1. Place the carburetor in a clean area on the work
bench.
2. Inspect the throttle valve assembly for dirt and/or var-
nish.
3. Install the throttle valve assembly
4. If the needle valve seat is damaged, replace the car-
buretor. See Figure 5.25.
5. There are ports in the metering valve body. Inspect
them for dirt and/or varnish. See Figure 5.26.
NOTE: The carburetor used in this manual is a Walbro.
Depending on the application, the engine may
have a different carburetor. All carburetors have a
manufacturer name cast on them. It is advisable to
contact the carburetor manufacturer for the proper
rebuild procedure.
6. Inspect the primer pump body for dirt and/or varnish.
See Figure 5.27.
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