MTD P90 series Shop Manual page 76

P90 Series Vertical Shaft Engines
11. If the results do not match the specifications:
11a. Turn off the engine.
11b. Disconnect the regulator/rectifier.
11c. Start the engine again and run it at full throttle.
12. Set the multimeter to read AC voltage.
13. Connect the black (-) lead of a digital multimeter to a
good ground on the engine.
14. Connect the red probe to one of the red wires from
the stator harness. See Figure 6.40.
NOTE: The meter should read 8.5 to 10 Vac.
15. Move the red probe to the other red wire.
NOTE: The meter should read 8.5 to 10 Vac.
NOTE: If the meter shows the proper readings, the regulator/rectifier is bad and needs to be replaced.
NOTE: If the readings don't match what is listed above, check the flywheel magnets. If the magnet are still
magnetic, replace the stator.
70
Figure 6.40