Camshaft; Inspection - Mercury MerCruiser Service Manual

IMPORTANT: Do not reuse the oil pump driveshaft retainer.
c
a
2. Install the oil pump driveshaft, a new driveshaft retainer, and the oil pump to the rear main bearing cap.
3. Tighten the oil pump screw to the specified torque.
Description
Oil pump screw (to rear crankshaft bearing cap)

Camshaft

Inspection

1. Inspect the camshaft thrust plate for damage. Replace if damaged or worn.
2. Inspect the camshaft for worn, scored, or damaged bearing journals or lobes.
3. Inspect the camshaft for bolt hole threads.
4. Inspect the camshaft sprocket locator pin.
5. Measure the camshaft bearing journals with a micrometer. If journals are not within specifications, the camshaft should be
replaced.
Description
Journal diameter
Journal out of round
6. Measure for a bent camshaft or excessive camshaft runout with a dial indicator. If the runout exceeds the specified
amount, the camshaft should be replaced.
90-8M0099748 eng DECEMBER 2015
a -
d
b -
c -
d -
b
55081
Checking camshaft alignment
Driveshaft
Driveshaft retainer
Oil pump
Screw
First
Final
© 2016 Mercury Marine
Engine Inspection and Assembly
Nm lb‑in.
20 177
+65°
6.2 Liter (377 cid)
47.465–47.490 mm (1.8687–1.8697 in.)
0.05 mm (0.0020 in.) maximum
6347
lb‑ft
–
Page 3B-33