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Mercury 305 CID - Starter Motor Disassembly; Cleaning and Inspection

Mercury 305 CID
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STARTING SYSTEM - 4A-790-823225--1 1096
INSTALLATION
1. Install solenoid onto plunger.
2. Twist solenoid to engage tab.
3. Install screws and tighten securely.
4. Install field coil connector screw.
Starter Motor Disassembly
1. Remove screw from field coil connector.
a
72631
a - Connector Screw
2. Remove end frame thru bolts, end frame, washer
and field frame.
72633
b
c
d
a
a - Thru Bolt
b - End Frame
c - Washer
d - Field Frame
3. Remove screws, center bearing plate and arma-
ture.
72634
b
c
a
a - Screws
b - Bearing Plate
c - Armature
4. Slide thrust collar off armature shaft.
5. Drive retainer ring toward armature.
6. Remove snap ring, retainer and clutch assembly.
Cleaning and Inspection
With starting motor completely disassembled, ex-
cept for removal of field coils, component parts
should be cleaned and inspected. Field coils should
be removed only where defects are indicated by
tests. Defective parts should be replaced or repaired.
IMPORTANT: DO NOT use grease dissolving sol-
vents for cleaning over-running clutch, armature
and field coils. Such a solvent would dissolve
grease packed in clutch mechanism and damage
armature and field coil insulation.
1. Test over-running clutch action. Pinion should
turn freely in over-running direction and must not
slip in cranking direction. Check pinion teeth.
Check spring for tension and drive collar for wear.
Replace if necessary.
2. Check that brush holders are not damaged or
bent and will hold brushes against commutator.
3. Check brushes. Replace if pitted or worn to
one-half their original length [5/16 in. (8 mm) or
less].
4. Check fit of armature shaft in bushing of drive
housing. Shaft should fit snugly. Replace bush-
ing, if worn. Apply SAE 20 oil to bushing before
reassembly. Avoid excessive lubrication.

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