Mercury 40 Service Manual page 203

CAUTION
Any grease used for bearings INSIDE the power-
head MUST BE gasoline soluble. Use only Quick-
silver Needle Bearing Assembly Lubricant. DO
NOT use 2-4-C Marine Lubricant, or other lubri-
cants inside powerhead, or damage to engine
may occur.
4. Grease crankshaft journal with Quicksilver
Needle Bearing Assembly Lubricant to hold bear-
ing in place. Position needle bearings on journal.
There are 28 bearings per each center main.
b
a - Crankshaft Journal
b - Bearings (28)
IMPORTANT: Snap ring groove faces up towards
flywheel.
5. Attach main bearing races with holes towards
lower gear end of crankshaft. Secure each main
bearing race with retaining ring. Lubricate top
main bearing with 2-cycle engine oil and install to
crankshaft as shown.
b
c
a - Main Bearing Race
b - Retaining Ring (Groove Faces Flywheel)
c - Top Main Bearing (One Piece)
90-852572R1 JANUARY 1998
a
PE-51081
a
b
PE-5108
6. Position cylinder block and piston rods as shown.
Insert locating pins.
a a
a - Locating Pins
Flywheel End
7. Place crankshaft into cylinder block; align and
seat top and center main bearings so that locat-
ing pins on block align with larger holes in each
bearing race.
a
PE-51088
Lower End
PE-51080
POWERHEAD - 4-33