
4A-28
90-13645--2
395
POWERHEAD
Install new piston pin lockrings (each side of piston)
using Lockring Tool (91-77109A1).
Make sure lockrings are properly seated in piston
grooves.
Do not reuse piston pin lockrings. Use only new
lockrings and make sure they are properly seated
in piston grooves.
CAUTION
51086
a
b
a - Lockring Installation Tool (91-77109A1)
b - Lockring (2)
51086
NOTE: Shaft of Lockring Installation Tool
91-77109A1 must be modified (shortened) to 1.050
in. (26.7 mm).
1.050 in. (26.7 mm)
Piston Ring Installation
IMPORTANT: Piston ring side with letter or mark
must be facing up.
Piston Ring
Piston rings are TAPERED top side, and flat (rectan-
gular) on the bottom side (half-keystone rings).
Enlarged View of
Piston Ring Grooves
Care must be taken not to scratch the side
surfaces of ring groove. Scratching this area will
damage the ring groove.
CAUTION
1. Install piston ring in appropriate groove on piston
using Piston Ring Expander Tool. Spread rings
just enough to slip over piston.
2. Check piston rings to be sure they fit freely in
groove. Lubricate rings and cylinder wall with
2-cycle oil.
51081
a
b
a - Piston Ring Expander
b - Piston Rings
Summary of Contents for 100
Page 4: ...GENERAL INFORMATION AND SPECIFICATIONS 1 ...
Page 18: ...IGNITION SYSTEM ELECTRICAL AND IGNITION A 2 ...
Page 30: ...11669 BATTERY CHARGING SYSTEM AND STARTING SYSTEM ELECTRICAL AND IGNITION B 2 ...
Page 58: ...22480 TIMING SYNCHRONIZING ADJUSTING ELECTRICAL AND IGNITION C 2 ...
Page 71: ...WIRING DIAGRAMS ELECTRICAL AND IGNITION D 2 ...
Page 86: ...FUEL SYSTEM AND CARBURETION A 3 ...
Page 118: ...OIL INJECTION SYSTEM B 3 ...
Page 127: ...20032 3 CYLINDER ENGINES POWERHEAD A 4 ...
Page 168: ...791 H GEAR HOUSING LOWER UNIT A 5 ...
Page 170: ...5A 1 90 13645 2 1095 LOWER UNIT Notes ...
Page 205: ...MID SECTION LOWER UNIT B 5 ...
Page 207: ...5B 1 90 13645 2 495 LOWER UNIT Notes ...
Page 218: ...SHOCK ABSORBER LOWER UNIT C 5 ...
Page 223: ...17250 DESIGN I SIDE FILL RESERVOIR POWER TRIM A 6 ...
Page 233: ...6A 9 POWER TRIM 90 13645 2 495 Commander Side Mount Remote Control Wiring Diagram ...
Page 268: ...DESIGN II AFT FILL RESERVOIR POWER TRIM B 6 51344 ...
Page 305: ...SINGLE RAM POWER TRIM C 6 51485 ...
Page 309: ...6C 3 90 13645 2 495 POWER TRIM Notes ...
Page 340: ...50099 ENGINE ATTACHMENTS ENGINE INSTALLATION 7 A ...
Page 369: ...TILLER HANDLE AND CO PILOT OUTBOARD MOTOR INSTALLATION ATTACHMENTS 7 B ...
Page 371: ...7B 1 90 13645 2 495 OUTBOARD MOTOR INSTALLATION ATTACHMENTS Notes ...