Stator Tests; Stator Resistance Tests; Stator Voltage Output Test - Evinrude E-Tec 40 HP Service Manual

STATOR TESTS

The st ator consists of 3 windings (4 poles each)
on a 5 inch diameter core and gene rates an out-
put vo ltage of 55 VAC (1 100 watt s maximum).
This voltage is converted by the EMM to p rovide
12 VDC for battery charging (3 to 5 A at 500 RPM
and 25 A from 3000 RPM to WOT ) and 55 VDC
for fuel injector, and fuel and oil pump operation.

Stator Resistance Tests

Use a digital multimeter to check resistance of sta-
tor windings.
Disconnect EMM J2 connector from EMM.
Stator Winding Resistance Specification
Yellow & Yellow / white
.670 ± 0.020 Ω @ 73°F (23°C)
Brown & Brown / white
.670 ± 0.020 Ω @ 73°F (23°C)
Orange & Orange / white
.670 ± 0.020 Ω @ 73°F (23°C)
1. EMM J2 Connector
Connect meter leads to the following pins:
Yellow/white and yellow (pins 9 and 1)
•
Brown/white and brown (pins 10 and 2)
•
Orange/white and orange (pins 11 and 3)
•
A reading of less th an 2 ohms is
IMPORTANT:
acceptable. Make sure meter is calibrated to read
1 ohm or less.
To che ck for a g rounded winding, conne ct on e
meter lead to ground and alternately connect the
other meter lead to each stator wire. Meter should
read no contin uity. If meter rea ds continuity,
replace stator.

Stator Voltage Output Test

E S
LECTRIC TART
Use a digit al multimeter to che ck st ator outp ut
voltage. Set meter to read 110 VAC output.
To prevent accidental starting of outboard,
disconnect crankshaft position sensor
(CPS).
Disconnect CPS.
Disconnect st ator (6-pin) con nector from th e
engine harness (6-pin) connector.
Connect Stator Test Adaptor tool, P/N 5005799, to
stator connector.
Connect meter leads to terminals of adaptor tool.
1
With a fu lly charged battery, crank outb oard (300
RPM minimum) and observe meter reading:
30 VAC at 300 RPM
•
40 VAC at 400 RPM
•
55 VAC above 500 RPM
•
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1. Stator Test Adaptor
ELECTRICAL AND IGNITION
STATOR TESTS
M
ODELS
A
WARNING
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