Mercury 30 Service Manual

2B-12 - ELECTRICAL 90-826148R2 MARCH 1997
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 starter
solenoid; proceed to TEST 7.
Neutral start switch is open, or YELLOW/RED
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 RED wire between
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 (starter motor) cable to starter solenoid 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 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 on lower engine cowl is open
or BLACK or WHITE switch leads are disconnected
or damaged.

Mercury 30 Specifications

General

Horsepower	30 HP
Cylinders	3
Displacement	526 cc
Gear Shift	F-N-R
Fuel Induction System	Electronic Fuel Injection (EFI)
Shaft Length	20 in
Steering	Remote / Tiller