MerCruiser 305 CID (5.0L) Service Manual page 229

SERVICE MANUAL NUMBER 24
WITHOUT CRANKSHAFT REMOVED
1. Remove oil pan, oil pump and spark plugs.
2. Remove cap on main bearing requiring replacement.
3. Remove bearing from cap.
4. Install main bearing remover/installer in oil hole in crankshaft journal. If such a tool is not
5. Rotate the crankshaft clockwise as viewed from the front of engine. This will roll upper
6. Oil new upper bearing.
7. Insert plain (unnotched) end between crankshaft and indented or notched side of block.
8. Rotate the bearing into place and remove tool from oil hole in crankshaft journal.
9. Oil new lower bearing and install in bearing cap.
10. Install main bearing cap with arrows pointing toward front of engine.
11. Torque all main bearing caps, EXCEPT THE REAR MAIN CAP, to specifications.
12. Torque rear main bearing cap to 15 lb-ft (20 Nm); then tap end of crankshaft, first rear-
13. Torque rear main bearing cap to specification.
Index
90-861327--1 OCTOBER 1999
available, a cotter pin may be bent, as shown, and used.
a - Main Bearing Remover/Installer (J-8080)
b - Cotter Pin
bearing out of block.
ward then forward with a lead hammer. This will line up rear main bearing and crankshaft
thrust surfaces.
a
5.0l / 305 cid / 5.7l / 350 cid ENGINES
b
Page 3A-63
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