4B - 14 - IGNITION SYSTEM
90-816462 2-695
Spark Advance Control
IMPORTANT: The ignition amplifier controls
spark advance above 1000 RPM. There is no ad-
justment. Initial timing must be set below 1000
RPM.
NOTE: Many timing lights are inaccurate at high en-
gine speeds; therefore, timing should not be adjusted
above 1000 RPM.
Module Part Number: 18811T1
Module Advance: 18
°
Initial Timing: 8
°
BTDC
Total Advance: 26
°
Advance Curve Chart
(Reference Only)
IMPORTANT: Advance curve charts do not in-
clude the initial engine timing. Basic initial timing
must be added to chart for total advance curve.
EXAMPLE: Advance curve chart shows 13
°
spark ad-
vance at 2000 RPM. Add 8
°
BTDC initial timing for a
total spark advance of 21
°
at 2000 RPM.
MCM 3.0 L DDIS MODELS
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5
°
10
°
15
°
20
°
25
°
30
°
35
°
ENGINE R.P.M.
T
O
T
A
L
SP
ARK
ADV
ANCE
MINUS INITIAL
TIMING
70808-4
MAX.
MIN.
Summary of Contents for 13
Page 1: ...13 Printed in U S A 90 816462 2 695 1995 Brunswick Corporation GM 4 Cylinder MARINE ENGINES ...
Page 2: ...90 816462 2 695 0 ...
Page 7: ...1 A IMPORTANT INFORMATION GENERAL INFORMATION 72000 ...
Page 15: ...1 B 50617 IMPORTANT INFORMATION MAINTENANCE ...
Page 36: ...1 C IMPORTANT INFORMATION TROUBLESHOOTING ...
Page 74: ...2 A 50633 REMOVAL AND INSTALLATION 4 CYL ALPHA ONE DRIVE ...
Page 88: ...3 A 26790 ENGINE 181 CID 3 0L 4 CYLINDER GM ENGINE ...
Page 137: ...4 A 72079 ELECTRICAL SYSTEMS STARTING SYSTEM ...
Page 170: ...4 B 71855 ELECTRICAL SYSTEMS IGNITION SYSTEM ...
Page 197: ...ELECTRICAL SYSTEMS CHARGING SYSTEM 4 C 72078 ...
Page 237: ...4 D 72747 ELECTRICAL SYSTEMS INSTRUMENTATION ...
Page 250: ...4 E 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS ...
Page 264: ...5 A FUEL SYSTEM FUEL PUMP ...
Page 271: ...5 B 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR ...
Page 300: ...6 A 50628 COOLING SYSTEM SEAWATER COOLED MODELS ...
Page 309: ...6 B 73665 COOLING SYSTEM CLOSED COOLING MODELS ...
Page 325: ...C 6 EXHAUST SYSTEM MANIFOLD ...
Page 331: ...7 A 71317 POWER STEERING PUMP ...