Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 103Get this manual
CHARGING
aSTARTING SYSTEM
Cleaning and Inspection
1Clean all motor parts
2Check pinion teeth for chips, cracks or excessive wear3Replace the drive clutch spring andlor collar, if tension is not adequateor if wear is ex
cessive
4Check that the brush holder is not damaged or is not holding the brushes against the
commutator