Cleaning And Inspection - Mercury MerCruiser MCM 454 Mag MPI Service Manual

Table of Contents

STARTING SYSTEM

10. Remove thrust collar, retaining ring and collar from planetary gear shaft assembly.

11. Remove drive and gear from planetary shaft.

Cleaning and Inspection

IMPORTANT: Do not use grease dissolving solvents to clean electrical components,

planetary gears, or drive. Solvent will damage insulation and wash the lubricant out

of the drive and gears. Use clean rags and compressed air to clean components.

1. Test over-running clutch action of drive. Pinion should turn freely in over-running direc-

tion 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 hold brushes against commuta-

tor. Check brushes for wear; refer to "Brushes and Brush Holder," in section

3. Inspect armature commutator. If badly grooved or out-of-round, turn down and undercut

4. Inspect all roller bearing surfaces for wear. Check that bearings roll freely. If any rough-

ness is felt, replace bearings.

5. Inspect planetary gear shaft assembly. Gears must mesh easily and roll freely with no

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Thrust Collar

Retaining Ring

Planetary Gear Shaft Assembly

SERVICE MANUAL NUMBER 23

90-861326--1 MARCH 1999

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