Mercury 40 FourStroke User Manual

CHARGING & STARTING SYSTEM
Page 2B-14 90-857046R1 NOVEMBER 2001
a. Disconnect BLACK ground wire(s) from Test Point 2.
b. Connect voltmeter between common engine ground and Test Point 2.
c. Turn ignition key to “Start” position.
* Battery Voltage
TEST 2
TEST 3
TEST 4
TEST 5
TEST 6
TEST 7
TEST 8
12 Volt Reading*
12 Volt Reading
12 Volt Reading*
12 Volt Reading*
12 Volt Reading*
12 Volt Reading*
12 Volt Reading*
No voltage reading;
proceed to TEST 3.
No voltage reading;
proceed to TEST 4.
No voltage reading;
proceed to TEST 5.
No voltage reading;
proceed to TEST 6.
a. Reconnect BLACK ground wire(s).
b. Connect voltmeter between common engine ground and Test Point 3.
c. Turn ignition key to “Start” position.
Check BLACK ground wire for poor connection
or open circuit. Reconnect ground wire to start-
er solenoid; proceed to TEST 7.
Neutral start switch is open, or YELLOW/
RED or BLACK wire is open between Test
Points 4 and 3.
a. Connect voltmeter between common
engine ground and Test Point 4.
b. Turn ignition key to “Start” position.
Defective starter solenoid.
Connect voltmeter between common
engine ground and Test Point 5.
Defective ignition switch.
Connect voltmeter between common engine ground and Test Point 6.
No voltage reading; check BLACK wire be-
tween battery (+) positive terminal and Test
Point 6.
Check fuse in RED wire between test points 5 and 6.
Check for open RED wire between test points 5 and 6.
a. Connect voltmeter between common engine ground and Test Point 1.
b. Turn ignition key to “Start” position.
No voltage reading; De-
fective starter solenoid.
Should hear solenoid click; proceed to TEST 8.
a. Reconnect Black (with yellow sleeve) (starter motor) cable to starter sole-
noid Test Point 1.
b. Connect voltmeter between common engine ground and Test Point 7
c. Turn ignition key to “Start” position.
No voltage reading; check Black (with yellow
sleeve)cable for poor connection or open circuit.
Check BLACK ground cable at starter for
loose or corroded connection, or open circuit.
If cable is O.K., check starter motor.
Electric Start Tiller Handle Model
Neutral start switch is open or BLACK leads are
disconnected or damaged.

Mercury 40 FourStroke Specifications

General

Brand	Mercury
Model	40 FourStroke
Category	Outboard Motor
Language	English