Johnson/Evinrude Troubleshooting
Three Cylinder Two Stroke Engines
1979-1988 60-75 HP Models
Service Note: Please use the Factory recommended spark plug (currently Champion QL77JC4) gapped at 0.030?.
NO SPARK ON ANY CYLINDER:
1. Disconnect the Black/Yellow stop wire AT THE POWER PACK and retest. If the engine?s ignition has spark, the
stop circuit has a fault. Check the key switch, harness and shift switch.
2. Disconnect the Yellow wires from the rectifier and retest. If the ignition now has spark, replace the rectifier.
3. Check the cranking RPM. A cranking speed of less than 250-RPM will not allow the system to spark properly.
This can be caused by a weak battery, dragging starter, bad battery cables or a mechanical problem inside the
engine.
4. Inspect and clean all engine and ignition ground connections.
5. Check the stator and timer base resistance and DVA output as given below:
WIRE READ TO OEM Ohms CDI Ohms DVA (Connected) DVA (Disconnected)
Brown Brown/Yellow 360-440 (9 amp) 530-630 150-400 V (*) 150-400 V (*)
Brown Brown/Yellow 750-950 (12 amp) 530-630 150-400 V (*) 150-400 V (*)
White Blue 9-21 0.6 V + 0.6 V + (#)
White Purple 9-21 0.6 V + 0.6 V + (#)
White Green 9-21 0.6 V + 0.6 V + (#)