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 fl ywheel strap wrench or
fl ywheel holding tool (see Section 2) to hold
the fl ywheel when loosening or tightening
the fl ywheel retaining screw. Do not use any
type of bar or wedge between the fi ns of the
cooling fan, as the fi ns could become cracked
or damaged.
Recoil Start Models
1. Remove the hex. fl ange 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. fl ange screw and
washer.
NOTE: Some engines have a domed cooling
fan, with a solid center hub covering
the fl ywheel screw. On those engines, it
will be necessary to remove the screen
and fan fi rst, 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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