Mercury MERCRUISER - Page 221

6. Install the main bearing caps in the original location with the markings pointing toward the front of the engine.
a - Main bearing cap
b - Bearing cap marks
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.
Description Where Used Part No.
136
Lubriplate SPO 255 Main bearings and crankshaft bearing journals Obtain Locally
9. Install the main bearing caps.
a - Crankshaft
b - Main bearing cap
c - Rear main bearing cap
d - Main bearing cap bolt
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
Nm lb‑in. lb‑ft
Crankshaft main bearing cap bolt—preferred method
First
15 132.7 –
Second
40 – 29.5
Final
+90°
a
b
55071
a
c
b
d
59495
Engine Inspection and Assembly
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 3B-19