IGNITION SYSTEM - 4B - 25
90-816462 2-695
Timing Procedure
IMPORTANT: Failure to follow the timing proce-
dure instructions will result in improper timing
causing performance problems and possible se-
vere engine damage.
1. Start engine and allow to reach operating temper-
ature.
2. With engine running, install a jumper wire across
the two WHITE leads on the distributor using
(91-818812A1), or fabricate one using a 6 in. (150
mm) section of 16 gauge wire with two male bullet
terminal ends connected.
70103
b
a
a - WHITE Leads
b - Jumper Lead
3. Bypass the shift interrupt switch by disconnecting
wires at shift interrupt switch. Temporarily join the
engine harness wires together.
IMPORTANT: Do not fail to reconnect these two
wires to the shift interrupt switch when timing
procedures are complete.
4. With timing light connected, check timing. Timing
should be 1
°
BTDC.
5. If required, loosen distributor hold down clamp
and rotate distributor to obtain specified timing.
6. Secure distributor hold down clamp, and recheck
timing as above.
7. Reconnect the two wires to the shift interrupt
switch. Remove jumper wire at distributor white
leads.
IMPORTANT: Be sure to remove jumper wire be-
fore returning engine to service, otherwise timing
will not advance.
8. With timing light still connected, and engine at
IDLE, verify that timing did advance to 12
°
BTDC,
(plus or minus 2
°
). At 2400-2800 RPM maximum
(total) advance is obtained and should be 27
°
BTDC (plus or minus 2
°
).
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 ...