Charging System Tests - BRP Evinrude E-TEC G2 Service Manual

Connect an inductive amp meter to the positive
(B+) battery cable at the battery.
1
2
Variable Load Test Diagram
1. Variable load tester
2. Inductive ammeter (optional)
3. Battery cable (B+)
12 V Charging Circuit
WARNING
Excessive battery discharge rates might
overheat battery causing electrolyte gas-
sing. This might create an explosive atmo-
sphere. Always work in a well ventilated area.
To test the operation of the regulator in the EMM,
and amperage output of the charging system you
must be able to run the outboard continuously at
approximately 2000 RPM, such as in a test tank or
on a marine dynamometer.
Monitor the charging system's response to a par-
tially discharged battery. Use a variable load tes-
ter (carbon pile) to discharge the battery.
IMPORTANT:
The regulator requires voltage to
operate. Before proceeding, make sure there is at
least 7 V on the positive terminal of the starter so-
lenoid.
IMPORTANT:
This outboard has dual output
charging. Each output is isolated and regulated.
Each output is approximately 20 A (NET). Com-
bined output is approximately 40 A (NET).
Following the manufacturer's directions, connect
the variable load tester across the battery termi-
nals.
Start and run the outboard at approximately 2000
RPM. Use the variable load tester to draw the bat-
3
009340
tery down at a rate equivalent to the stator's full
output.
•
The ammeter should indicate nearly full output,
approximately 40 A (or 20 A if the auxiliary bat-
tery charge is installed).
Decrease the battery load toward 0 A.
•
Ammeter should show a reduced output. As the
current draw decreases, the battery voltage
should stabilize at approximately 14.5 V.
•
If results vary, check stator BEFORE replacing
the EMM. See Stator Tests on p. 125.
Auxiliary Battery Charge Circuit
The auxiliary battery charge feature requires Aux-
iliary Battery Charge Kit, P/N 5009079 (or equiva-
lent) and it must be protected by a 50 A fuse or
circuit breaker at the battery.
Use Evinrude Diagnostics software to monitor bat-
tery voltage and charge current.
IMPORTANT:
Disconnect all accessories from
the auxiliary battery. Auxiliary battery must read a
minimum of 8.5 V at the beginning of these tests
and remain connected to the outboard during the
tests.
Start and run the outboard at approximately 2000
RPM. Use the variable load tester to draw the bat-
tery down at a rate equivalent to the stator's full
output.
•
The ammeter should indicate nearly full output,
approximately 20 A above 1500 RPM.
Decrease the battery load toward 0 A.
•
Ammeter should show a reduced output. As the
current draw decreases, the battery voltage
should stabilize at approximately 14.5 V.
•
If results vary, check stator BEFORE replacing
the EMM. See Stator Tests on p. 125.
Electrical and Ignition

Charging System Tests

127
6