1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 332Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 332

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CHECKING AND CLEANING COMMUTATOR
IMPORTANT: Install spring, check valve and O-ring into manifoldPosition components in place using sleeve to seat in placea Manifold and Pump O-ring (3) Spring Sl