2001 Mercury Mariner 50-60HP Factory Service Manual, Page 117Get this manual

2001 Mercury Mariner 50-60HP Factory Service Manual, Page 117

CHARGINGSTARTING SYSTEM
Cleaning and Inspection
1Clean all motor parts2Check pinion teeth for chips, cracks or excessive wear3Replace the drive clutch spring andor collar, if tension is not adequate, or if wear is excessive4Check that the brush holder is not damaged or is not holding the brushes against the commutator5Replace brushes that are pitted or worn to less than 14 in(6.4mm) in lengthRefer to "BRUSH REPLACEMENT", following6Replace damaged or excessively worn bushing in the end cap7Check the armature conductor (commutator bar junction) for firm connectionA poor connection usually results in burned commutator bar8Re-surface and undercut rough commutator, as follows:

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