Crankshaft Installation - Mercury 40 Service Manual

4. Remove connecting rod cap from connecting rod
being installed.
5. Install each piston with "UP" identification facing
flywheel end. Pistons MUST be installed in this
direction.
CAUTION
Pistons must be installed very carefully into cyl-
inders. Piston rings can not be inspected thru ex-
haust ports.
6. Bottom end of cylinder bore has taper which per-
mits the insertion of the piston into block without
using a piston ring compressor. Place piston
carefully into cylinder.
4-32 - POWERHEAD
UP
PE-51087

Crankshaft Installation

1. If lower bearing and gear were removed from
crankshaft, slide gear in place (note keyway and
key in gear to crankshaft assembly). Install gear
to crankshaft using an arbor press and suitable
mandrel.
2. Install main bearing retaining ring after pressing
main bearing tight against oil gear.
a - Lower Bearing
b - Gear
c - Retaining Ring
CAUTION
Safety glasses should be worn when removing or
installing ring seals.
3. Install ring seals (2) to crankshaft.
b
a - Ring Seal
b - Slot On Crankshaft
b
a
c
PE-51084
a
PE-51083
90-852572R1 JANUARY 1998