| Page 32 - Index - Page 34 |
| Johnson/Evinrude
Alternator Driven CD Ignitions
1978-1999 (continued)
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| Models with S.L.O.W.
|
Engine will not rev beyond 2500 RPM:
- Use a temperature probe and verify that the engine is not overheating.
- Disconnect the tan temperature wire from the pack and retest. If the engine now performs properly, replace the temperature switch.
- Make sure the tan temperature switch wire is not located next to a spark plug wire.
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Three Cylinder Engines (Quick Start Models)
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- Disconnect the black yellow kill wire and retest. If the engines now has fire, the kill circuit has a fault-possibly the keyswitch, harness or shift switch.
- Disconnect the yellow wires from the stator to the rectifier and retest. If the ignition now fires, replace the rectifier.
- Check the stator resistance. You should read approximately 550 ohms from the brown wire to the brown/yellow wire and 100 ohms or 500 ohms from the orange to orange/black.
- Check the DVA output from the stator. You should have a reading of at least 150V or more from the brown wire to the brown/yellow wire and at least 12V or more from the orange to orange/black (while connected to the pack).
- Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to fire properly.
- Check the timer bases resistance from the white wire to the blue, green and purple wires. Reading should be 38- 42 ohms.
- Check the DVA output from the timer base. A reading of at least 0.5V or more from the white wire to the blue, green and purple wires (while connected to the pack) is needed to fire the pack.
- Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to fire properly.
|
No fire or intermittent on One Cylinder:
- Check the timer bases resistance from the white wire to the blue, green and purple wires. Reading should be 38-42 ohms.
- Check the DVA output from the timer base. A reading of at least 0.5V or more from the white wire to the blue, green and purple wires (while connected to the pack) is needed to fire the pack.
- Check the DVA output on the orange wires from the power pack while connected to the ignition coils. You should have a reading of at least 150V or more. If the reading is low on one cylinder, disconnect the orange wire from the ignition coil for that cylinder and reconnect it to a load resistor. Retest. If the reading is now good, the ignition coil is likely bad. A continued low reading indicates a bad power pack.
|
Engines with S.L.O.W. |
Engine will not rev beyond 2500 RPM:
- Use a temperature probe and verify that the engine is not overheating.
- Disconnect the tan temperature wire from the pack and retest. If the engine now performs properly, replace the temperature switch.
- Make sure the tan temperature switch wire is not located next to a spark plug wire.
|
Four Cylinder Engines
(Except Quick Start Models)
|
No Fire at All:
- Disconnect the black yellow kill wire and retest. If the engines now has fire, the kill circuit has a fault-possibly the keyswitch, harness or shift switch.
- Disconnect the yellow wires from the stator to the rectifier and retest. If the engine fires, replace the rectifier.
- Check the stator resistance. You should read approximately 500 ohms from the brown wire to the brown/yellow wire.
- Check the DVA output from the stator. You should have a reading of at least 150V or more from the brown wire to the brown/yellow wire (while connected to the pack).
- Check the timer bases resistance from the white wire to the blue, green, pink and purple wires. Reading should be 38-42 ohms.
- Check the DVA output from the timer base. A reading of at least 0.5V or more from the white wire to the blue, green, pink and purple wires (while connected to the pack) is needed to fire the pack.
- Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to fire properly.
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continued next page....
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Page 32 - Index - Page 34 |
