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Greensmaster Flex 18/21
Page 3 – 9
Engine
Engine Removal (Fig. 5)
1. Make sure machine is parked on a level surface with
the engine OFF. Remove spark plug wire from the spark
plug to prevent the engine from starting. Close fuel
shut–off valve.
2. If engine is to be disassembled, it may be easier to
drain oil from engine before removing engine from trac-
tion unit.
3. Drain oil from gearbox.
4. Remove throttle cable from engine:
A. Remove cap screw and flange nut that secure
cable clamp to traction unit frame (Fig. 6). Locate
and retrieve three (3) washers from under clamp.
B. Loosen screw that secures throttle cable to
throttle cable nut enough to slide the cable out of the
nut (Fig. 7).
C. Position throttle cable away from engine.
5. Disconnect electrical connections from engine (Fig.
8):
A. Unplug wire harness connector from interlock
module.
B. Disconnect engine stop switch and armature
wires from wire harness connectors.
C. Disconnect wire harness ground wire from en-
gine by removing cap screw and lock washer.
6. Remove engine from the engine base (Fig. 6):
A. Remove four (4) flange nuts that secure gearbox
assembly to set screws on engine crankcase cover.
B. Support gearbox between mower frame and
gearbox flange.
C. Remove four (4) cap screws, flat washers and
flange nuts that secure engine to engine base of trac-
tion unit.
D. Carefully slide engine away from gearbox as-
sembly to allow engine gear to clear gearbox. Re-
move and discard flange gasket (item 2).
E. Remove the engine from the traction unit.
7. If necessary, remove cap screw, lock washer and flat
washer that secure engine gear to crankshaft. Slide
gear from crankshaft. Remove square key from engine
crankshaft keyway.
Figure 6
1. Gearbox flange nuts
2. Engine mounting screws
3. Throttle cable clamp
2
1
2
3
Figure 7
1. Governor
lever
2. Throttle
cable
3. Throttle cable screw
4. Throttle cable nut
1
2
4
3
Figure 8
1. Wire
harness
2. Interlock
module
3. Stop switch wire
4. Armature
wire
5. Cap screw/lock washer
1
5
2
4
3
Engine
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