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Omc Ignition Switch Wiring Diagram 1994

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Page 31 - Index - Page 33
Johnson/Evinrude Alternator Driven CD Ignitions 1978-1999
Two Stroke/Except Ficht
Two Cylinder Engines
No Fire at All:
  1. 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.
  2. Check the stator resistance. You should read approximately 500 ohms from the brown wire to engine ground. (See DVA Charts).
  3. Check the DVA output from the stator. You should have a reading of at least 150V or more from the brown wire to brown/yellow (while connected to the pack).
  4. Check the timer bases resistance from the black/white wire to the white/black wire. Reading should be 10-20 ohms or 38-42 ohms.
  5. Check the DVA output from the timer base. A reading of at least 0.5V or more from the black/white wire to the white/black (while connected to the pack) is needed to fire the pack.
  6. Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to fire properly.
  7. 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 readings are low, disconnect the orange wires from the ignition coils and reconnect them to load resistors. Retest. If the reading is now good, the ignition coil are likely bad. A continued low reading indicates a bad power pack.
No fire on one cylinder:
  1. Either a faulty power pack or ignition coil normally causes this. Extremely rare causes include a weak trigger magnet in the flywheel or a timer base.

Engines with S.L.O.W.
Engine will not rev beyond 2500 RPM:
  1. Use a temperature probe and verify that the engine is not overheating.
  2. Disconnect the tan temperature wire from the pack and retest. If the engine now performs properly, replace the temperature switch.
  3. Make sure the tan temperature switch wire is not located next to a spark plug wire.

Three Cylinder Engines (Except Quick Start Models)
No Fire at All:
  1. 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.
  2. Disconnect the yellow wires from the stator to the rectifier and retest. If the ignition now fires, replace the rectifier.
  3. Check the stator resistance. You should read approximately 500 ohms from the brown wire to the brown/yellow wire. (See DVA Charts).
  4. 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).
  5. Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to fire properly.
  6. Check the timer bases resistance from the white wire to the blue, green and purple wires. Reading should be 38-42 ohms.
  7. 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.
  8. 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:
  1. Check the timer bases resistance from the white wire to the blue, green and purple wires. Reading should be 38-42 ohms.
  2. 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.
  3. 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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Page 31 - Index - Page 33

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