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Rev. B
Workman MDXPage 3 -- 4Briggs & Stratton Gasoline Engine
Adjustments
Adjust Throttle Cable
NOTE: The Workman MDX is equipped with an engine
governor. Refer to the Briggs & Stratton Repair Manual
at the end of this chapter for governor information on
these machines.
Depressing the accelerator pedal rotates the engine
governor bellcrank which tensions the main governor
spring to increase engine speed. Releasing the acceler-
ator pedal decreases governor spring tension to reduce
engine sp eed.
1. Park machine on a level surface, stop engine, en-
gage parking brake and remove key from the ignition
switch.
2. Lift cargo box and prop with rod to gain access to the
engine.
3. When the accelerator pedal is fully depressed the
engine governor bellcrank mechanism should have a
gap from 0.030” to 0.080” (0.8 to 2.0 mm) (Fig. 2). If
necessary, adjust jam nuts on throttle cable so that gap
is correct.
4. Make sure that shift lever is in the neutral position to
prevent the machine from moving.
5. With ignition switch in the RUN position, depress ac-
celerator pedal and allow engine to start. Fully depress
accelerator pedal and have a second person measure
engine speed with a tachometer. With pedal fully de-
pressed, engine speed should be from 3250 to 3350
RPM. If necessary, adjust throttle cable or engine gov-
ernor so that engine speed is correct when the acceler-
ator pedal is fully depressed.
6. After throttle cable adjustment is correct, lower and
secure cargo box.
Figure 1
1. Throttle cable 2. Governor bellcrank
1
2
ACCELERATOR
PEDAL RELEASED
Figure 2
1. Throttle cable
2. Governor bellcrank
3. Gap
3
1
2
ACCELERATOR
PEDAL DEPRESSED