| Page 33 - Index - Page 35 |
| Johnson/Evinrude
Alternator Driven CD Ignitions
1978-1999 (continued)
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No fire or intermittent on One Cylinder:
- 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 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.
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No fire or Intermittent on One Bank:
- 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). Also check DVA to engine ground from each brown wire and compare the readings. If one wire reads low while connected to the pack, swap the connections and see if the low reading stays on the same stator wire. If it does, the stator is bad.
- 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 bank, disconnect the orange wires from the ignition coil for that bank and reconnect them to a load resistor. Retest. If the reading is now good, one or both of the ignition coils are likely bad. A continued low reading indicates a bad power pack.
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Engines with S.L.O.W.
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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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Four Cylinder Engines (Quick Start Models)
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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 1000 ohms from the brown wire to the brown/yellow wire and 100 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 (while connected to the pack).
- Check the timer base 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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No fire or Intermittent on One Cylinder:
- Check the timer bases resistance from the white wire to the blue, green, pink and purple wires. Reading should be 38-42 ohms.
- Disconnect the white/black temperature wire and retest. If all cylinders now fire, replace the timer base.
- 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 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.
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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.
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Page 33 - Index - Page 35 |
