Evinrude E-Tec 40 HP Service Manual page 105

Starter Voltage Drop Test
A
WARNING
To prevent accidental starting of outboard,
disconnect crankshaft position sensor
(CPS).
Use a digit al voltme ter to me asure the volt age
drop on each section of the start circuit.
If an y vo ltage read ing is greate r than 0.5 VDC
check that connections are clean, tight and free of
corrosion. Clean or replace an y corroded or dam-
aged cables or connections.
STEP 1: Con nect voltmet er positive (+) lead to
the terminal for the ne gative (–) batter y cab le at
powerhead. Conn ect vo ltmeter negat ive (–) le ad
to negative (–) battery post.
Activate st arter motor and ob serve volt age
•
reading.
1
2
+
1. Negative battery cable
2. Positive battery cable
3. Solenoid
4. Starter cable
STEP 2: Connect positive (+) lead to battery posi-
tive (+) terminal. Connect nega tive (–) lead to
starter solenoid terminal.
Activate st arter motor and ob serve volt age
•
reading.
STEP 3: First, activate st arter motor . Conne ct
positive (+) lead to starter solenoid terminal. Con-
nect negative (–) lead to o pposite starter solenoid
terminal.
V –
NEG
V
3
–
4
008464
ELECTRICAL AND IGNITION
ELECTRIC START TESTS
Observe voltage reading.
•
STEP 4: Connect positive (+) lead to starter cable
of solenoid terminal. Connect negative (–) lead to
starter motor terminal.
Activate st arter motor a nd observe volt age
•
reading.
No Load Current Draw Test
Securely fasten starter in a vise or suitable fixture
before proceeding with this check.
Use a batte ry rated at 500 CCA (60 amp-hr) or
higher that is in good condition and fully charged.
Use an inductive ammeter or connect a 0 to 10 0
amp amme ter in series with
between the b attery positive (+) terminal and th e
starter positive (+) terminal.
Fluke model 33 4 or 336, Snap-On model MT110
or EETA501, and various other ammeters should
be available through local tool suppliers.
Attach or hold a vibration t achometer, such as a
† Reed tachometer, to the starter.
Frahm
Complete the circuit with a heavy jumper between
the batte ry n egative (–) te rminal a nd t he st arter
frame.
Monitor the starter RPM and current draw.
At 10 ,500 RPM the a mmeter should sh ow a
•
maximum of 30 A.
a heavy jump er
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