9.9
Section 9
Disassembly
9
Figure 9-29. Removing Valves. (Bridge Type Head.)
Remove Drive Cup, Grass Screen,
Flywheel and Fan
NOTE: Always use a flywheel strap wrench or
flywheel holding tool (see Section 2) to hold
the flywheel when loosening or tightening the
flywheel retaining screw. Do not use any type
of bar or wedge between the fins of the cooling
fan, as the fins could become cracked or
damaged.
Recoil Start Models
1. Remove the hex. flange screw, plain washer, and
drive cup. See Figures 9-30 and 9-31.
Figure 9-28. Removing Valves with Valve Spring
Compressor.
Strap
Wrench
Figure 9-30. Removing Flywheel Retaining
Screw and Drive Cup. (Recoil Start Models.)
Figure 9-31. Loosening Flywheel Fastener.
2. Remove the grass screen from fan. See
Figure 9-32.
Electric Start Models
1. Engines without a retractable starter will not have a
drive cup. Remove the hex. flange screw and
washer.
NOTE: Some engines have a domed cooling fan,
with a solid center hub covering the
flywheel screw. On those engines, it will
be necessary to remove the screen and
fan first, to access the screw and washer.
All Models
The grass screen snaps onto six small knobs on the
cooling fan. Some engines have additional push-on
retaining clips on three of the knobs to prevent the
screen from working loose.
Plain Washer
Drive
Cup
Hex. Flange
Screw
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