Mercury 90 Service Manual

90-830234R3 DECEMBER 1997 POWERHEAD - 4-5
Crankshaft, Pistons and Connecting Rods
(3 Cyl.)
REF.
TORQUE
REF
.
NO.
QTY. DESCRIPTION lb. in. lb. ft. N·m
1 1 CRANKSHAFT
2 1 BALL BEARING(LOWER)
3 1 WEAR SLEEVE
4 1 O-RING
5 1 RING ASSEMBLY
6 2 KEY
7 1 DRIVER GEAR
8 1 ROLLER BEARING ASSEMBLY(UPPER)
9 1 OIL SEAL
10 1 O-RING
11 2 ROLLER BEARING ASSEMBLY
3 PISTON ASSEMBLY (STANDARD)
12 AR PISTON ASSEMBLY (.015 O.S.)
AR PISTON ASSEMBLY (.030 O.S.)
13 6 LOCK RING
1 PISTON RING ASSEMBLY (STANDARD)
14 AR PISTON RING ASSEMBLY (.015 O.S.)
AR PISTON RING ASSEMBLY (.030 O.S.)
15 3 CONNECTING ROD ASSEMBLY
16 6 WASHER
17 87 NEEDLE BEARING
18 6 SCREW
Apply Light Oil to
Threads and Bolt
Face; 1st Torque - 15
lb. in.(1.7 N·m) -
Recheck Alignment;
2nd Torque - 30 lb.
ft.(47.6 N·m); Turn
Bolt an additional 90
degrees after 2nd
Torque
19 3 ROLLER BEARING ASSEMBLY

Mercury 90 Specifications

General

Brand	Mercury
Model	90
Category	Outboard Motor
Language	English