52900 Mercury SCREEN, FILTER-CARBURETOR

Illustration 1 g02848764
Front view
Table 1
Specification for 237-7957 Cylinder Block Gp
Item Qty Part Specification Description
The top face of the cylinder block, bottom surface of spacer plate (2) and both sides of plate gasket (4) must be free of fuel, oil, water, gasket adhesives, assembly compounds and any other contaminants during assembly.
1 2 4W-4813 Plug Torque to 100 15 N m (74 11 lb ft).
2 8 110-6994 Spacer Plate Thickness is 12.313 mm (0.4848 inch).
3 16 8T-0099 Dowel Extension of the dowel from the top face of the cylinder block is 20.0 0.5 mm (0.79 0.02 inch).
4 8 144-5692 Plate Gasket Thickness of plate gasket that is between cylinder block and spacer plate is 0.194 to 0.218 mm (0.0076 to 0.0086 inch).
5 8 197-7008 Dowel Extension of the dowel from the top face of the cylinder block is 21.0 0.5 mm (0.83 0.02 inch).
A 10 101-1198 Camshaft Bearing Bore in the block for the camshaft bearing is 98.000 0.020 mm (3.8583 0.0008 inch).
B - - All centerlines through oil holes in the camshaft bearings and the camshaft bearing junctions (6) are shown for each side of the cylinder block.
Oil holes must be positioned from horizontal at an angle of 20 5 degrees.
C - - New dimension from centerline of crankshaft bearing bore to the top of the block is 586.0 mm (23.07 inch).
7 8 6V-3348 O-Ring Seal Lubricate the bore lightly with sealant that is being sealed.
8 5 223-1696 Crankshaft Bearing Cap Install crankshaft bearing caps with the part number and FRONT toward the front of the block. Each cap has a number. Each cap must be installed in the same position as the correct number on the side of the cylinder block pan rail.
D - - Width of crankshaft bearing cap (8) is 340.030 0.015 mm (13.3870 0.0006 inch).
Width of cylinder block for crankshaft bearing cap is 339.985 0.015 mm (13.3852 0.0006 inch).
Tight press fit between the sides of the crankshaft bearing cap and the cylinder block is 0.075 mm (0.0030 inch).
Loose press fit between the sides of the crankshaft bearing cap and the cylinder block is 0.015 mm (0.0006 inch).
E - - Bore in the block for the crankshaft 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).
F - - New dimension from centerline of crankshaft bearing bore to bottom of block (pan rails) is 230.00 mm (9.055 inch).
9 20 7X-7925 Bolt Use the following procedure to tighten the bolts.
1. Lubricate the threads with clean engine oil before assembly.
2. Tighten the bolts by hand.
2. Tighten the bolts in the numerical sequence as shown in Illustration 1 to 190 14 N m (140 10 lb ft).
3. Again tighten the bolts in the numerical sequence as shown in Illustration 1 to an angle of 180 5 degrees.
Illustration 2 g02848765
Right side view
Table 2
Specification for 237-7957 Cylinder Block Gp
Item Qty Part Specification Description
G 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).
H 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).
J 2 4N-0683 Dowel Extension of the dowel from the rear face of the cylinder block is 19.0 0.5 mm (0.75 0.02 inch).
K 2 7N-2044 Dowel Extension of the dowel from the front face of the cylinder block is 40.0 0.5 mm (1.58 0.02 inch).
10 4 5F-9657 O-Ring Seal Lubricate the bore lightly with sealant that is being sealed.