41470A15 Mercury WARNING MODULE ASSEMBLY

Illustration 1 g00368854
Typical exampleNote: Refer to Guideline for Reusable Parts for information on the pistons, the piston pins, and the retaining rings.Top Piston Ring
The 1U-6431 Piston Ring Groove Gauge is used for measuring the ring grooves in keystone style pistons. Refer to the Special Instruction that is supplied with the Piston Ring Groove Gauge . (1) Top piston ringInstall the piston ring with "UP-1" mark toward the top of the piston.There is a clearance between the ends of the piston ring. When the piston ring is installed in a cylinder liner with a bore of 137.16 mm (5.400 inch), the clearance is the following value. ... 0.55 0.15 mm (0.022 0.006 inch)There is an increase in the clearance between the ends of the piston rings for each 0.030 mm (0.0012 inch) increase in the cylinder liner bore. Increase ... 0.08 mm (0.003 inch)Intermediate Piston Ring
The 1U-6431 Piston Ring Groove Gauge is used for measuring the ring grooves in keystone style pistons. Refer to the Special Instruction that is supplied with the Piston Ring Groove Gauge . (2) Intermediate piston ringInstall the piston ring with "UP-2" mark toward the top of the piston.There is a clearance between the ends of the piston ring. When the piston ring is installed in a cylinder liner with a bore of 137.16 mm (5.400 inch), the clearance is the following value. ... 1.08 0.19 mm (0.043 0.008 inch)There is an increase in the clearance between the ends of the piston rings for each 0.030 mm (0.0012 inch) increase in the cylinder liner bore. Increase ... 0.08 mm (0.003 inch)Oil Control Ring
(3) Oil Control RingThe spring ends of the oil control ring should be assembled 180 degrees from the ring end gap.The 5P-3519 Piston Ring Groove Gauge is available for checking the ring grooves with straight sides. Refer to the Guideline for Reusable Parts for instructions on using the Piston Ring Groove Gauge .Width of groove in new piston for oil control ring ... 3.210 0.010 mm (0.1264 0.0004 inch)Thickness of new piston ring ... 3.137 0.013 mm (0.1235 0.0005 inch)Clearance between groove and new piston ring ... 0.073 0.025 mm (0.0029 0.0010 inch)Maximum permissible clearance of worn ring ... 0.15 mm (0.006 inch)There is a clearance between the ends of the piston ring. When the piston ring is installed in a cylinder liner with a bore of 137.16 mm (5.400 inch), the clearance is the following value. ... 0.572 0.191 mm (0.0225 0.0075 inch)There is an increase in the clearance between the ends of the piston rings for each 0.030 mm (0.0012 inch) increase in the cylinder liner bore. Increase ... 0.08 mm (0.003 inch)Piston Pin Bore
(4) Piston pin boreBore in piston crown assembly for pin ... 50.848 0.008 mm (2.0019 0.0003 inch)Bore in piston skirt for pin ... 50.824 0.004 mm (2.0009 0.0002 inch)Diameter of the new piston pin ... 50.770 0.005 mm (1.9988