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 and used 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, fuel and oil pump operation. The ignition module of 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.
- EMM J2 Connector
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)
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 voltmeter to check the 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 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 Test Adaptor
