Reply To: 1988 Johnson 9.9 NO spark.

[Don]

Well, I may not be following everything correctly, but it would seem as though we are missing something here….First, when you did the stop switch elimination test, did you just disconnect the stop switch ground, or did you push the black stop lead out of the amphenol connector? Simply disconnecting the stop switch ground does not eliminate the switch from the circuit, you must push the stop switch lead out of the amphenol connector….You really need the ampenol tools to do this properly, please don’t just cut the leads.
OK, later I read you did actually cut the stop switch lead, but still not spark…You have replaced the powerpack and the charge coil which didn’t help, correct? Those amphenol connections can be a real bugger for sure. I guess I would push all the wires out of the connectors to make sure the leads aren’t broken, and the pins/sockets are located correctly. And, sure doesn’t seem likely that both coils are bad….Have you checked the sensor with an ohm meter and done the output tests with the peak reading voltmeter? How about the air gap of the two components? Are you sure you haven’t crossed one of the connections inadvertently?
Has the engine been overheated? Any signs of melted/pinched wiring?
Again, I fear we are missing something relatively simple here….Like you said, the engine ran OK last year, now no spark…The sensor is a simple winding that doesn’t fail usually, except if it is damaged physically by the flywheel…