0397153 EVINRUDE ENGINE COVER ASSY., 175

Illustration 1 g03379865
Table 1
Specification for 371-0827 Piston
Item Qty Part Specification Description
Prior to the installation of the piston rings, lubricate the ring grooves with clean engine oil. After assembly of the piston rings, lubricate the mating surfaces of the rings to the cylinder liner with clean engine oil.
1 1 229-1632 Top Piston Ring Install the top piston ring with the "UP-1" side toward the top of the piston.
Thickness of new top piston ring is 4.5 mm (0.18 inch).
Clearance between the ends of the piston ring is 0.625 0.125 mm (0.0246 0.0049 inch).
2 1 144-5695 Intermediate Piston Ring Install the intermediate piston ring with the "UP-2" side toward the top of the piston.
Thickness of new intermediate piston ring is 3.785 mm (0.1490 inch).
Clearance between the ends of the piston ring is 1.00 0.15 mm (0.039 0.006 inch).
3 1 165-6668 Oil Control Piston Ring Ends of the oil control piston ring should be a distance of 180 degrees from the ring end gap when the piston ring is assembled. The colored portion of the piston ring must be visible at the ring end gap.
Width of groove in new piston for the oil control piston ring is 4.055 0.015 mm (0.1596 0.0006 inch).
Thickness of new oil control piston ring is 3.980 0.010 mm (0.1567 0.0004 inch).
Clearance between the ends of the piston ring is 0.65 0.15 mm (0.026 0.006 inch).
- - - After all of the piston rings have been installed, rotate the piston rings so that the end gaps are separated by 120 degrees.
4 2 253-1238 Pin Retainer Install the pin retainer with the gap toward the top of the piston.
Thickness is 2.36 0.08 mm (0.093 0.003 inch).
Width of groove in new piston for the pin retainer is 2.75 0.1 mm (0.108 0.004inch).
5 1 302-3451 Piston Pin Before assembly of the piston pin, lubricate piston pin, piston pin bore, and connecting rod eye with clean engine oil.
Outside diameter is 69.930 0.005 mm (2.7531 0.0002 inch).
Length is 101.85 0.15 mm (4.010 0.006 inch).
Bore in the finished bearing for the piston pin is 70.0705 0.0075 mm (2.75868 0.00030 inch). 371-0828 Piston
Illustration 2 g03379868
Table 2
Specification for 371-0828 Piston
Item Qty Part Specification Description
Prior to the installation of the piston rings, lubricate the ring grooves with clean engine oil. After assembly of the piston rings, lubricate the mating surfaces of the rings to the cylinder liner with clean engine oil.
1 1 144-5695 Intermediate Piston Ring Install the top piston ring with the "UP-1" side towards the top of the piston.
Thickness of new intermediate piston ring is 3.785 mm (0.1490 inch).
Clearance between the ends of the piston ring is 1.00 0.15 mm (0.039 0.006 inch).
2 1 214-6066 Top Piston Ring Install the intermediate piston ring with the "UP-2" side toward the top of the piston.
When the new top piston ring is installed in a cylinder liner, the clearance between the ends of the piston ring is 0.625 0.125 mm (0.0246 0.0049 inch).
Thickness of new top piston ring is 3.88 mm (0.153 inch).
3 1 223-6361 Oil Control Piston Ring The ends of the oil control piston ring should be a distance of 180 degrees from the ring end gap when the oil control piston ring is assembled.
Width of groove in new piston for the oil control piston ring is 4.04 mm to 4.07 mm (0.159 to 0.160 inch).
Thickness of oil Control piston ring is 3.97 to 3.99 mm (0.156 to 0.157 inch).
When the new oil control piston ring is installed in a cylinder liner, the clearance between the ends of the piston ring is 0.5 mm to 0.8 mm (0.02 to 0.03 inch).
- - - After all of the piston rings have been installed, rotate the piston rings so that the end gaps are separated by 120 degrees.
4 2 253-1238 Pin Retainer Install the pin retainer with the gap toward the top of the piston.
Thickness is 2.36 0.08 mm (0.093 0.003 inch).
Width of groove in new piston for the pin retainer is 2.75 0.1 mm (0.108 0.004inch).
5 1 263-8955 Piston Pin Before assembly, lubricate the piston pin, the piston pin bore, the connecting rod eye, and the connecting rod pin bearing with clean engine oil.
Outside diameter is 69.930 0.005 mm (2.7531 0.0002 inch).
Length is 101.7 to 102.0 mm (4.00 to 4.02 inch).
Bore diameter in the piston for the piston pin is 70.0705 0.0075 mm (2.75867 0.00030 inch).