IGNITION SYSTEM - 4B - 7
90-816462 2-695
POINT ADJUSTMENT WITH
FEELER GAUGES
1. Rotate distributor until rubbing block rests on
peak of cam lobe, which will provide maximum
breaker point opening.
2. Insert correct feeler gauge between breaker
points.
3. Loosen lock screw and adjust points to .016 in.
(0.5mm).
27045
a
a - Lock Screw
DWELL ADJUSTMENT
1. Remove distributor cap and rotor.
2. Connect positive (+) dwell meter lead to negative
(–) side of coil. Connect negative (–) meter lead
to ground.
3. Loosen point lock screw slightly.
4. While cranking engine with starter, adjust dwell
with a screwdriver to obtain reading on dwell me-
ter, as specified in “Specifications”, and tighten
lock screw. (Dwell reading will be unsteady using
this method.)
IMPORTANT: Cam angle increases as point open-
ing is decreased and vice versa.
50654
Cam Angle
a - Cam
b - Direction or Rotation
c - Breaker Points
d - Dwell (In Degrees When Points Are Closed)
e - Points Open
5. Install rotor and distributor cap and recheck dwell
with engine running.
IMPORTANT: Dwell should be checked between
idle and 1750 RPM. Any dwell reading variations
of more than 3
°
between idle and 1750 RPM would
indicate wear in the distributor. Cam angle read-
ings, taken at speeds above 1750 engine RPM,
may prove unreliable on some dwell meters.
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 ...