I have an intermittent no spark condition on my 1996 Evinrude 150. It is always on cold start after sitting for a day or more. It did it this morning, and I am currently troubleshooting the problem. So far I have:
Disconnected the black / yellow wire from the power pack. I did this by removing the corresponding pin from the connector, then reconnecting the connector to the pack. No change.
Measured cranking speed at 315 rpm with an optical tachometer.
Measured 10.5 - 11 volts on yellow / red wire at power pack during cranking.
Measured stator output DVA while cranking. All ok per CDI troubleshooting guide.
Measured 12.5 - 13 volts input to optical sensor from power pack and 9.5 volts output from optical sensor. According to the CDI troubleshooting guide, the sensor should be replaced if the voltage difference between input and output is greater than 2 volts.
The original optical sensor failed a few months ago, and I replaced it with a new CDI optical sensor.
My current questions are: Does my voltage difference across the optical sensor really indicate that it is bad? Could it be responsible for an intermittent no spark condition that occurs only on cold start? What could cause the new sensor to fail so quickly? Input voltage too high?
Disconnected the black / yellow wire from the power pack. I did this by removing the corresponding pin from the connector, then reconnecting the connector to the pack. No change.
Measured cranking speed at 315 rpm with an optical tachometer.
Measured 10.5 - 11 volts on yellow / red wire at power pack during cranking.
Measured stator output DVA while cranking. All ok per CDI troubleshooting guide.
Measured 12.5 - 13 volts input to optical sensor from power pack and 9.5 volts output from optical sensor. According to the CDI troubleshooting guide, the sensor should be replaced if the voltage difference between input and output is greater than 2 volts.
The original optical sensor failed a few months ago, and I replaced it with a new CDI optical sensor.
My current questions are: Does my voltage difference across the optical sensor really indicate that it is bad? Could it be responsible for an intermittent no spark condition that occurs only on cold start? What could cause the new sensor to fail so quickly? Input voltage too high?
