Mercury 40 Service Manual page 288

2. Disassemble Oil Pump.
a -
b -
c -
d -
e -
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. Between outer rotor and pump housing (a).
b. Between the inner rotor and outer rotor (b).
c. Between the outer rotor and pump housing (c).
90-828631R3 MARCH 1999
b
e
d
a
c
Cover Seal
Outer Rotor
Inner Rotor
Shaft
Cross Pin
c
Oil Pump Clearances
a 0.001 - 0.006 in. (0.03 - 0.15 mm)
b
c 0.001 - 0.003 in. (0.03 - 0.08 mm)
a
b
55803
0.005 in. (0.12 mm)
LUBRICATION
Page 4C-3