Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 225Get this manual
CYLINDER BLOCKCRANKCASE
Specifications
CYLINDER BLOCK STROKE Type Displacement Number of Cylinders Length
Diameter Standard Oversize-Om in(0.25 mm) Oversize-0.020 in(0.50 mm) TaperOut of Round Maximum Bore Type Stroke CycleOver Head Camshaft 45.6 cuin(747cc) 3
2.953 in(75 mm) 2.5591 in(65 mm) 2.5689 in(65.25 mm) 2.5787 in(65.5 mm) 0.003 in(0.08 mm) Cast Iron
Aluminum
CYLINDER BORE
Piston Type
0 .0at Skirt
PISTON Standard Oversize-0.Ol0 in(0.25 mm) Oversize-0.020 in(0.50 mm) Piston to Cylinder Clearance Ring End Gap (Installed) Top Middle Bottom (Oil Ring) Side Clearance: Top Middle
Compression Ratio Cylinder Compression (Electric Models OnlyCold Engine W.O.T Piston Pin Diameter
PISTON CLEARANCE