STATOR TESTS
The stator consists of 3 windings (4 poles each) on a 5 inch diameter core and generates an out put 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.
- EMM J2 Connector
| 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
ELECTRIC START MODELS
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
- 55 VAC above 500 RPM
- Stator Test Adaptor
ROPE START MODELS
Use a Peak Reading Voltmeter, P/N 507972, to check stator output voltage. Set meter to the 50 VAC scale.
To prevent accidental starting of outboard, disconnect crankshaft
position sensor (CPS).
Disconnect CPS. Remove spark plugs. Make sure to SPARK outboard is in NEUTRAL. Refer PLUGS on p. 90.
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. Rotate the flywheel with the starter rope, using a long, steady pull.
Stator output voltage should be approximately 30 VAC.
1.Stator Test Adaptor
IMPORTANT: Index all spark plugs. Refer to Spark Plug Indexing on p. 90.
CHARGING SYSTEM TESTS
12 V Charging Circuit
To test the operation of the regulator in the EMM, you must be able to run the outboard continuously at approximately 5000 RPM, such as in a test tank or on a marine dynamometer.
The test consists of monitoring the system’s response to a partially discharged battery. Use a variable load tester 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 solenoid.
Disconnect the battery cables at the battery.
Use an inductive amp meter or connect a 0 to 50 A ammeter in series between the red wire of engine wire harness (alternator output from EMM) and the positive (B+) battery cable terminal of starter solenoid.
Fluke model 334 or 336, Snap-On model MT110 or EETA501, and various other amp meters should be available through local tool suppliers.
Reconnect the battery cables.
