136
ELECTRICAL AND IGNITION
STATOR TESTS
STATOR TESTS
The stator consists of 3 windings (6 poles each)
on a 7 inch diameter core and generates an out-
put voltage of 55 VAC (1700 watts maximum).
This voltage is converted by the EMM to provide
12 VDC for battery charging (10 A at 500 RPM
and 50 A from 2000 RPM to WOT) and 55 VDC
for fuel injector and oil pump operation. The igni-
tion module of the EMM is also powered by the
55 VDC output.
Stator Resistance Tests
Use a digital multimeter to check resistance of
stator windings.
Disconnect EMM J2 connector from EMM.
Connect meter leads to the following pins:
• Yellow/white and yellow (pins 17 and 7)
• Brown/white and brown (pins 28 and 8)
• Orange/white and orange (pins 18 and 10)
IMPORTANT: A reading of less than 2 ohms is
acceptable. Make sure meter is calibrated to read
1 ohm or less.
To check for a grounded winding, connect one
meter lead to ground and alternately connect the
other meter lead to each stator wire. Meter should
read no continuity. If meter reads continuity,
replace stator.
Stator Voltage Output Test
Use a digital multimeter to check stator output
voltage. Set meter to read 110 VAC output.
Disconnect CPS.
Disconnect stator (6-pin) connector from the
engine harness (6-pin) connector.
Connect Stator Test Adaptor tool, P/N 5006211,
to stator connector.
Connect meter leads to terminals of adaptor tool.
With a fully charged battery, crank outboard (100
RPM minimum) and observe meter reading:
• 20 VAC at 100 RPM
• 30 VAC at 150 RPM
• 42 VAC at 200 RPM
• 52 VAC at 250 RPM
• 62 VAC at 300 RPM
Stator Winding Resistance
Yellow & Yellow / white
.512 ± .020 Ω @ 73°F (23°C)
Brown & Brown / white
.512 ± .020 Ω @ 73°F (23°C)
Orange & Orange / white
.512 ± .020 Ω @ 73°F (23°C)
1. EMM J2 Connector 005434
1
WARNING
To prevent accidental starting of outboard,
disconnect crankshaft position sensor
(CPS).
1. Stator Test Adaptor 005436
1
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