STATOR TESTS
The stator consists of 3 windings (4 poles each) on a 5 inch diameter core and generates an output voltage of 55 VAC (1100 watts maximum).
This voltage is converted by the EMM to provide 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 stator windings.
Disconnect EMM J2 connector from EMM
| Stator Winding Resistance Specification |
|---|
| Yellow & Yellow / white .670 ± .020 Ω @ 73°F (23°C) |
| Brown & Brown / white .670 ± .020 Ω @ 73°F (23°C) |
| Orange & Orange/ white .670 ± .020 Ω @ 73°F (23°C) |
- 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)
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.
To prevent accidental starting of outboard, disconnect crankshaft position sensor (CPS).
Disconnect CPS.
Disconnect stator (6-pin) connector from the engine harness (6-pin) connector.
Connect Stator Test Adaptor tool, P/N 5005799, to stator connector.
Connect meter leads to terminals of adaptor tool.
With a fully charged battery, crank outboard (300 RPM minimum) and observe meter reading:
- 30 VAC at 300 RPM
- 40 VAC at 400 RPM
- Stator Test Adaptor
IMPORTANT: Rope start models can be tested using a Peak Reading Voltmeter, set to the 50 VAC scale. Remove spark plugs and rotate flywheel with the starter rope, using a lone, steady pull. Voltage should be approximately 30 VAC.
- 55 VAC above 500 RPM
