Starter Motor

STARTER MOTOR

1 O-ring 
2 Brush 
3 Armature 
4 Washer 
5 Circlip

Removal

Refer Chapter 3. "ENGINE DISASSEMBLY".

Inspection

1. Inspect commutator outer surface. Clean with 600 grit sandpaper if dirty. Check mica insulation between commutator segments and scrape mica to proper limits. Use a hacksaw blade that is ground to fit.

Mica Undercut 1 : 0.4 - 0.8 mm (0.02 - 0.03 in)

NOTE:
The mica insulation of commutator must be under-cut to ensure proper operation of commutator.

2. Measure the armature coil continuity 1. Replace or rewind starter motorif necessary.

Armature Coil: 0.014Ω ± 6% at 20°C (68° F)

Measure the armature coil insulation 2. Replace the starter motor if shorted.

3. Inspect:

• Front cover bearing 1
• Center and rear covers bushings 2

 Replace if damaged.

4. Measure the length of each brush length a and replace if less than minimum length.

Minimum Brush Length: 8.5 mm (0.34 in)

5. Check the brush spring pressure  and compare with new spring. Replace spring if weak.