Mercury 40 Service Manual page 223

Cleaning and Inspection
Oil Pump
1. Check oil pump components for pitting, scratches, and for the following measurements.
Replace oil pump if worn or out of specification.
2. Using a feeler gauge, measure the following oil pump clearances:
a
b
c
Rocker Shaft and Rocker Arm
1. Measure rocker shaft diameter. Replace shaft if out of specification.
2. Measure rocker arm inside diameter. Replace rocker arms if out of specification.
90-828631R3 MARCH 1999
between outer rotor and pump housing (a)
between the inner rotor and outer rotor (b)
between the outer rotor and pump housing (c)
a
b
Oil Pump Clearances
0.001 - 0.006 in. (0.03 - 0.15 mm)
0.001 - 0.003 in. (0.03 -0.08 mm)
Rocker Shaft Diameter
0.6288 - 0.6296 in. (15.971 -15.991 mm)
55804
Rocker Arm Inside Diameter
0.6299 - 0.6306 in. (16.000 -16.018 mm)
0.005 in. (0.12 mm)
CYLINDER HEAD
c
55803
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