2001 Mercury Mariner 50-60HP Factory Service Manual, Page 268Get this manual

2001 Mercury Mariner 50-60HP Factory Service Manual, Page 268

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CYLINDER BLOCKCRANKCASE
Valve Lift Starts to Open Minimum 0.12 in(3 mm)

Oil Pressure Switch
1 Check continuity of switch

Oil Switch Continuity Check Below 2.9 psi