
2B-8
90-13645--2
495
ELECTRICAL AND IGNITION
Tachometer Terminal Block (Design 1)
DESCRIPTION
Contains a diode which blocks high voltage AC
pulses (180 VAC) coming from the stator and allows
low voltage DC pulses (20-30 VDC) to pass through
to be counted by the tachometer. This terminal block
(with diode) is only used with large, finned type regu-
lators. This block is BLACK in color.
WARNING
HIGH VOLTAGE is present at the tachometer
block’s stator side terminals, while the outboard
is running. To avoid electrical shock, physical
contact should not be made on these terminals or
ANY IGNITION RELATED COMPONENT WHILE
THE OUTBOARD IS RUNNING.
IMPORTANT: The following ohm test is used to de-
termine the proper functioning of the diode lo-
cated in the tachometer block. If the diode is
OPEN (NO CONTINUITY IN EITHER DIRECTION),
the tachometer will be inoperative.
TESTING TACHOMETER TERMINAL BLOCK
(DESIGN 1)
With outboard NOT running, remove all leads from
block. Using an ohmmeter, test block as shown, fol-
lowing. Continuity should be observed on the ohm-
meter with the needle swinging in only ONE direction.
NO CONTINUITY should be observed when test
leads are reversed. If CONTINUITY is observed in
BOTH directions or NO CONTINUITY is observed in
either direction when leads are reversed, diode is de-
fective and MUST BE REPLACED.
NOTE: There is only one diode located in the tachom-
eter block. It may be located either between the cen-
ter (TACH) terminal and the top (ALT) terminal or be-
tween the center (TACH) terminal and the lower (ALT)
terminal.
50644
ALT YEL
ALT YEL
GREY
TACH
50644
ALT YEL
ALT YEL
GREY
TACH
Tachometer Terminal Block (Design 2)
DESCRIPTION
This block is a junction point for stator and tachometer
signal wiring. It contains no electrical components.
This block is LIGHT GREY in color and is to be used
ONLY with small, non-finned voltage regulators. No
test is required for this terminal block.
Tachometer Terminal Block
(Design 1 and 2)
REMOVAL
1. Remove two YELLOW alternator wires from
block.
2. Remove GREY tachometer wire from block.
3. Remove two attaching screws and remove diode
block.
INSTALLATION
1. Secure diode block to powerhead with two
screws. Torque screws to 30 lb. in. (3.4 N
m).
2. Attach two YELLOW wires to “ALT YEL”
terminals.
3. Attach GREY wire to “GREY TACH” terminal.
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 ...