Electric Start System (12 Volt); Troubleshooting; Introduction; Starter Removal - Toro Lawn-boy Service Manual

Troubleshooting

Starter Motor Fail to Turn
Possible Cause
Starter motor has failed
Battery has low charge or is disconnected
Engine has seized
Starter switch malfunction
Bad ground
Bad wires between battery and starter

Introduction

The electric start models of the DuraForce engine
utilize a 12 volt starting system consisting of a:
• starter motor
• battery
• key switch
• alternator
• regulator (cup assembly)
• starter relay
• fuse

Starter Removal

1. Unplug the wiring connector at the starter.
Remove the three screws that secure the upper
fuel tank/shroud assembly, and move it off to one
side. While it is not necessary to disconnect the
fuel line, the fuel tank should be nearly empty while
working on the starting system.
2. Remove the two nuts and two bolts that secure the
inner shroud/recoil housing, and move it off to the
side. Again, it is not necessary to remove the
assembly from the unit.

ELECTRIC START SYSTEM (12 VOLT)

Correction
Check by disconnecting the spark plug wire and starter wiring
connector. Apply 12 volts directly to the starter motor. (Note: Due
to the connector arrangement, it is possible that the starter motor
will turn backwards during this test. This does not harm the motor.)
Check battery for full charge and ensure it is connected.
Verify that the engine turns over easily.
Use a volt/ohmmeter to insure there is continuity in the start
position.
Check to ensure the ground is secure and not corroded.
Use a volt/ohmmeter to ensure that continuity exists
3. Loosen the Allen head bolt used to secure the
starter pin with a 1/4" Allen wrench. (See Figure
96.) It may be necessary to remove the carburetor
bolts and lower the carburetor to gain access the
needed clearance for the Allen wrench.
53
Figure 96
1657-005