1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 166Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 166

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9 Reinstall Flywheel CoverTighten wing-nuts securely10 Reinstall oil reservoirReconnect hoses and secure with sta-strapsSee Section 3B for more details, if necessarySee "Oil Reservoir" diagrams at beg