Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 133Get this manual
CYLINDER BLOCK AND CRANKCASE
POWERHEAD
Section 4BCylinder Block and Crankcase
Table of Contents
Specifications 4B-1 Special Tools 4B-4 PowerheadGeneral Information 4B-5 Cylinder Block 4B-6 Crankshaft 4B-8 Oil Pan 4B-10 Powerhead Removal Removing Powerhead Components Powerhead Disassembly Inspection Powerhead Reassembly Powerhead Installation 4B-13 4B-13 4B-14 4B-22 4B-31 4B-43
Specifications
CYLINDER BLOCK STROKE CYLINDER BORE Type Displacement Number of Cylinders Length Diameter Standard Oversize-0.020 in(0.50 mm) TaperOut of Round Maximum Bore Type Piston Type O.Dat Skirt Standard Oversize-0.020 in(0.50 mm) Piston to Cylinder Clearance Piston Clearance Limit Ring End Gap (Installed) Top Middle Bottom (Oil Ring) Side Clearance: Top Middle Bottom (Oil Ring) Compression Ratio With Decompression 45 (19992000) 45 (2001Newer) (2000Newer) Outer Diameter Diameter of Piston Pin Hole Clearance between Piston Pin and Piston Pin Hole Stroke Cycle Over Head Valve 7.5 cuin(123 cc) 1.77 in(45 mm) 2.323 in(59.00 mm) 2.343 in(59.50 mm) 0.003 in(0.076 mm) Steel Aluminum 2.321 in(58.960 mm) 2.341 in(59.460 mm) 0.0010.002 in(0.0200.055 mm) 0.006 in(0.15 mm) 0.0060.014 in(0.150.35 mm) 0.0120.020 in(0.300.50 mm) 0.0080.016 in(0.200.40 mm) 0.00150.003 in(0.040.08 mm) 0.00120.003 in(0.030.07 mm) 0.00040.007 in(0.010.18 mm) 8.5:1 42 psi 14 psi (0.29 0.1 MPa) 9.5:1 42 psi 14 psi (0.29 0.1 MPa) 0.6299 in(16.00 mm) 0.6300 in(16.002 mm) 0.00010.0005 in(0.002 mm0.012 mm)