Inspection Of Starter Motor Pinion; Inspection Of Armature - TOHATSU MFS25 Service Manual

Electrical System

4) Inspection of Starter Motor Pinion

1. Check pinion teeth for crack and wear. Replace if necessary.
Fix clutch 2, and turn only pinion 1 to check that it can be
2.
rotated smoothly in one direction. Replace if necessary.
Turn pinion 1 counterclockwise to check that it
can be rotated smoothly. Also, check that pinion
is locked when turned clockwise.

5) Inspection of Armature

Check commutator 1 for dirt. If necessary, clean by using
1.
sand paper of No. 600 or by air-blowing.
Measure commutator 1 outer diameter. Replace starter
2.
motor ass'y if outer diameter is less than specified value.
Commutator Outer Diameter : Standard Value
30.0 mm ( 1.181 in )
Wear Limit :
29.50 mm ( 1.142 in )
Measure undercut a of commutator 1. Replace starter
3.
motor ass'y if less than specified value.
Commutator Undercut : Standard Value
0.5 to 0.8 mm ( 0.020 to 0.031 in )
Wear Limit a :
0.2 mm ( 0.008 in )
Check electrical conductivity of armature 2. Replace starter
4.
motor ass'y if other than specified condition.
Armature Conductivity :
b Between Commutator Segments 3 - 3 Conductive
c Between Segment - Armature Core
d Between Segment - Armature Shaft
8-22
3
Non-conductive
Non-conductive
1
2
2
1
1
3
3
3
3
3
1
2
c
b
a
d
25/30 2006