Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 159Get this manual
CYLINDER BLOCK AND CRANKCASE
Measuring Inside Diameter of Oil Pan BearingCamshaft
Standard Value 0.5515 in(14.01 mm) Out of the Limit Depends of clearance
Clearance Between the Oil Pan Bearing and Camshaft
Standard Value 0.00080.002 in(0.020.05 mm) Out of the Limit If 0.0028 in(0.07 mm) or more requires replacement