Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 129Get this manual
CYLINDER BLOCK AN CRANKCASE
CYLINDER BLOCK
REFNOQTY1 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 CYLINDER BLOCK OIL SEAL BALL BEARING FILLER CAP ORING CAP GASKET BOLT BREATHER TUBE WASHER TUBING CLAMP CYLI NDER HEAD GASKET DOWEL PIN GASKET THERMOSTAT COVER GASKET THERMOSTAT BOLT (M8 90 mm) BOLT (M8 60 mm) SPARK PLUG (NGKUDCPR6E) COVER GASKET BOLT (M6 20 mm) WASHER 18 18 13