Mercury MerCruiser Service Manual page 221

6. Install the main bearing caps in the original location with the markings pointing toward the front of the engine.
a
7. Check the clearance of each main bearing, following the procedure outlined under Main Bearing Clearance, Plastigauge
Method.
8. When bearing clearances meet specifications, lubricate the main bearings and crankshaft bearing journals.
Tube Ref No.
Lubriplate SPO 255
136
9. Install the main bearing caps.
b
a
10. Check main bearing clearance using plastigauge. Refer to Main Bearing Clearance, Plastigauge Method.
11. Tighten all main bearing caps, except the rear main cap, to the specified torque.
Description
Crankshaft main bearing cap bolt—preferred method
90-8M0099748 eng DECEMBER 2015
Description
Main bearings and crankshaft bearing journals
Engine Inspection and Assembly
b
55071
Where Used
a -
b -
c -
d -
d
c
59495
First
Second
Final
© 2016 Mercury Marine
a - Main bearing cap
b - Bearing cap marks
Part No.
Obtain Locally
Crankshaft
Main bearing cap
Rear main bearing cap
Main bearing cap bolt
Nm lb‑in.
15 132.7
40 – 29.5
+90°
Page 3B-19
lb‑ft
–