MTD 25cc, Профессиональное руководство по эксплуатации

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Ignition
23
Flywheel
The flywheel of an engine performs four functions:
• It stores energy.
• Provides the momentum that keeps the crankshaft
rotating between power strokes.
• It times the firing of the ignition module.
• Forces air around the engine for cooling.
To remove the flywheel:
1. Remove the spark plug by following the steps
described in Chapter 2: Maintenance.
2. Remove the starter by following the procedures
described in Chapter 6: starter.
3. Remove the flywheel by striking the crankshaft with a
brass punch. See Figure 4.7.
NOTE: It is not necessary to remove the module to
remove the flywheel.
NOTE: The Belleville washer between the flywheel and
the spacer may grab the crankshaft like a pawl nut
when compressed. To remove the washer, use the
flywheel as a slide hammer and drive the washer
off of the crankshaft. Discard the damaged washer.
NOTE: Inspect the flywheel key and the crankshaft key-
way. See Figure 4.8.
NOTE: The flywheels used on the P25 series of engines
are double sided fans for greater cooling capacity.
See Figure 4.9.
4. Inspect the flywheel and key for any signs of dam-
age.
5. Install the flywheel by following the previous steps in
reverse order.
NOTE: Tighten the clutch to a torque of 210 - 230 in lbs
(24 - 26 Nm).
NOTE: Set the module air gap by following the steps
described in the previous section of this manual.
6. Test run the engine before returning it to service.
Figure 4.7
Gently pry while striking
Figure 4.8
Flywheel key
Figure 4.9
Flywheel
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com