Carburetor Acceleration Pump - Toro Workman 3000 Series Service Manual

Carburetor Acceleration Pump

Throttle valve
Pump nozzle
Pump leak jet
Outlet check valve
Check valve
Inlet check valve
Diaphragm
Lever
From float chamber
Figure 33
1. Remove air intake hose. 3. Clean the fuel path if fuel is not injected.
2. Check to see that fuel is injected from pump nozzle
when throttle valve is opened while keeping the choke
valve open.
Choke Valve
1. Remove air intake hose.
Choke valve
2. Move choke valve with a finger and check for smooth
movement without backlash.
3. If there is excessive backlash replace mixing body or
entire carburetor. If choke valve is sticking, clean parts
around choke valve and apply oil to choke shaft.
Figure 34
Liquid Cooled Gas Engine Workman 3000/4000 Series
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