Re: 1977 9.9 Johnson ignition troubleshooting procedure

[Don]

OK, yes, just looked in a 78 book for a 4hp with CD2 ignition: charge coil: 575+/-75 ohms sensor coil: 40+/-10 ohms….
I am assuming you have checked these components, and the resistance readings are within tolerance and there are no shorts to ground. Yes, there are output tests for these components, but you will need the peak reading voltmeter, or the adapter you mentioned….
Did you check the grounds using the low ohms scale?
Did you remove the stop switch black wire pin from the coil three pin connector and restest for spark?
Did you have a look at the pin/socket connections in both connectors? This is an all too often over looked simple problem/repair.
Again, the amphenol pin/socket tools make this process much easier, use only alcohol to "lube" the rubber boots (helps pin/socket removal as well), using any other spray lubes will create a short between the connections and problems down the road….D