1998 Johnson 150 no spark

[tendollar]

Need a little help. My 150 ELECD just decided to give me trouble. 3 weeks ago i noticed my tach started acting up randomly reading at 5900 - 6000 rpm and then would settle down to the NOR. Also the quick start would on occasion take up too 10 min. to kick down on a cold motor and sometimes even on a warm motor but the motor fired right up and ran like a top. Last week i went to launch and she would crank but not fire. I have charged my battery, checked spark gap and have zero spark on all cylinders. Next i checked the STOP CIRCUIT and still no spark on all cylinders. It wants me to check the TIMING SENSOR, I do not own an OMC ignition analyzer so my question is, Is there some other way to check this?

 

[Chris1956]

Perhaps you can check the other components and isolate the issue. First inspect the motor wiring harness.. I have the same motor, and in a couple of places the harness melted and some wires shorted. Not sure why, but my ign accessory circuit was melted to ground. Perhaps your ign killer wire (black/yellow) got grounded.

Next disconnect the shift assist switch. There is a blocking diode in the circuit. If that shorted and the switch malfunctioned, it would kill your spark.

Other than that, you can extrapolate some of the voltage readings using a multimeter. It should narrow the field.