855530T98 Mercury POWERHEAD

Illustration 1 g02617919
Front view
Table 1
Specification for 240-6651 Cylinder Block Gp and 240-6653 Cylinder Block Gp
Item Qty Part Specification Description
1 16 110-6994 Spacer Plate During assembly, the bottom of spacer plates must be free of fuel, oil, water, gasket adhesives, assembly compounds, and any other contaminants.
Thickness is 12.313 mm (0.4848 inch).
2 16 144-5692 Plate Gasket During assembly, both sides of plate gasket must be free of fuel, oil, water, gasket adhesives, assembly compounds and any other contaminants.
Thickness is 0.194 to 0.218 mm (0.0076 to 0.0086 inch).
3 2 4W-4813 Plug Torque to 100 15 N m (74 11 lb ft).
4 - - During assembly, top of cylinder block must be free of fuel, oil, water, gasket adhesives, assembly compounds, and any other contaminants.
5 18 101-1198 Camshaft Bearing All centerlines through oil holes in the camshaft bearings and the camshaft bearing junctions (5) must be positioned that is shown in Illustration 1 for each side of the cylinder block.
Oil holes must be positioned from horizontal at an angle (D) of 20 5 degrees.
6 8 6V-3348 O-Ring Seal Lubricate the bore lightly with the lubricant that is being sealed.
A 32 8T-0099 Dowel Extension of the dowel from the top face of the cylinder block is 21.0 0.5 mm (0.83 0.02 inch).
B - - Bore in the cylinder block for the camshaft bearings is 98.000 0.020 mm (3.8583 0.0008 inch).
C 16 197-7008 Dowel Extension of the dowel from the top face of the cylinder block is 21.0 0.5 mm (0.83 0.02 inch).
E - - New dimension from centerline of crankshaft bearing bore to the top of the block is 586.00 mm (23.071 inch).
F - - New dimension from centerline of crankshaft bearing bore to bottom of block (pan rails) is 230.00 mm (9.055 inch).
G - - Bore in the block for the main bearings:
Standard, original new size is 169.742 0.020 mm (6.6827 0.0008 inch).
0.63 mm (0.025 inch) larger than original size is 170.372 0.020 mm (6.7076 0.0008 inch).
H - - Width of main bearing is 340.030 0.015 mm (13.3870 0.0006 inch).
Width of cylinder block for main bearing cap is 339.985 0.015 mm (13.3852 0.0006 inch).
Illustration 2 g02617921
Right side view
Table 2
Specification for 240-6651 Cylinder Block Gp and 240-6653 Cylinder Block Gp
Item Qty Part Specification Description
7 4 5F-9657 O-Ring Seal Lubricate the bore lightly with 5P-3975 Rubber Lubricant.
J 2 7N-2047 Dowel Extension of the dowel from the front face of the cylinder block is 6.0 0.5 mm (0.24 0.02 inch).
K 1 7N-2047 Dowel Extension of the dowel from the rear face of the cylinder block is 6.0 0.5 mm (0.24 0.02 inch).
L 2 4N-0683 Dowel Extension of dowels from the rear face of the cylinder block is 19.0 0.5 mm (0.75 0.02 inch).
M 2 7N-2044 Dowel Extension of dowels from the front face of the cylinder block is 40.0 0.5 mm (1.58 0.02 inch). Camshaft Bearing Position
Illustration 3 g03113603
Right side view
Table 3
Specification for 240-6651 Cylinder Block Gp and 240-6653 Cylinder Block Gp
Item