
2C-1
ELECTRICAL AND IGNITION
90-13645--2 1095
Timing/Synchronizing/
Adjusting (3 Cylinder Models)
Specifications
70, 75 and 80 Models
Serial Number and Above
U.S.
B239242
Belgium
9502135
Canada
A730007
Full Throttle RPM Range
4750 - 5250
Idle RPM (in “FORWARD” Gear)
650 - 700
Maximum Timing @ 5000 RPM
(@ Cranking Speed)
26
B.T.D.C.
(28
B.T.D.C.)
Idle Timing
0
- 4
B.T.D.C.
Spark Plug
NGK BUHW-2
Firing Order
1-3-2
70, 75 and 80 Models
Serial Number and Below
U.S.
B239241
Belgium
9502134
Canada
A730006
Full Throttle RPM Range
4750 - 5250
Idle RPM (in “FORWARD” Gear)
650 - 700
Maximum Timing @ 5000 RPM
(@ Cranking Speed)
22
B.T.D.C.
(24
B.T.D.C.)
Idle Timing
0
- 4
B.T.D.C.
Spark Plug
NGK BUHW-2
Firing Order
1-3-2
90 Models
Full Throttle RPM Range
5000 - 5500
Idle RPM (in “FORWARD” Gear)
650 - 700
Maximum Timing @ 5000 RPM
(@ Cranking Speed)
26
B.T.D.C.
(28
B.T.D.C.)
Idle Timing
0
- 4
B.T.D.C.
Spark Plug
NGK BUHW-2
Firing Order
1-3-2
Mariner 75 Marathon/Merc 75XD
Full Throttle RPM Range
4750 - 5250
Idle RPM (in “FORWARD” Gear)
650 - 700
Maximum Timing @ 5000 RPM
(@ Cranking Speed)
16
B.T.D.C.
(18
B.T.D.C.)
Idle Timing
0
- 4
B.T.D.C.
Spark Plug
NGK BUHW-2
Firing Order
1-3-2
Special Tools
Part No.
Description
*91-58222A1
Dial Indicator Gauge Kit
*91-59339
Service Tachometer
*91-99379
Timing Light
91-63998A1
Spark Gap Tool
* May be obtained locally.
Timing Pointer Adjustment
WARNING
Engine could start when turning flywheel to check
timing pointer alignment. Remove spark plugs
from engine to prevent engine from starting.
1. Install Dial Indicator P/N 91-58222A1 into no. 1
(top) cylinder.
2. Turn flywheel clockwise until no. 1 (top) piston is
at top dead center (TDC). Set Dial Indicator to “0”
(zero).
19062
91-58222A1
3. Turn flywheel counterclockwise until Dial Indica-
tor needle reads approximately 0.550 (13.97mm)
BTDC, then turn flywheel clockwise so that
needle reads 0.491 in. (12.47 mm) BTDC exactly.
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 ...