Rotor - MTD P90 series Shop Manual

P90 Series Vertical Shaft Engines

Rotor

Rotor failures are extremely rare.
To check the rotor:
• Confirm that the magnets are firmly attached to
the flywheel.
• Hold a screwdriver or a similar tool made of fer-
rous metal within a 1/4" of each magnet.
• If the tool is drawn to the magnet, the rotor is
good.
Flywheel nut
Alternator stator screws
Starter mounting screws
AC output
DC output
Starter armature resistence
Alternator stator resistence
72
Chapter 6: Specification Table
Description Specification
74 - 85 ft lbs (100 - 115Nm)
80 - 106 in lbs (9 - 12 Nm)
195 - 221 in lbs (9 - 12Nm)
11 - 20 Vac @ 3,300 RPM
13.75 - 15.5 Vdc @ 3,300 RPM
<0.2Ω
0.5 - 1.0Ω
Figure 6.44