Ignition coil keep going bad ( 3 in a week )

[Maximebrien]

So here is my situation, I bought this Yamaha 8msh 2 stroke 2006 just before Irma. When I first installed it on my dinghy it was working like a charm. Then the next morning I started it and as I was going to the dock it just died on me. Tried to pull the starter a few dozen times. Nothing was happening. Then i thought it was the spark plugs so I went to Napa and bought two new ones. Still nothing ! So it end up being an fried ignition coil. So I ordered a new one, installed it and i started it first pull. As I had hard time with my iddle I took the carb out. Clean it and mess with it for a few hours. In that day I must have started the outboard at least 30 times . Then all the sudden I was trying to start it and nothing happened. So I look at the plugs and I wasn't getting any spark. An other ignition coil burned in less then 24 hours. Then I bought an other ones and again same thing, I got the engine started in the first pull. This one worked great for two days, and again it died on me while I was going to a friend boat next to me.

I'm kinda lost here, cause I don't know exactly what could cause that. Someone told me it could be a bad stator that send wrong voltage to the ignition coil. As I have the CDI in between them, could it be a bad CDI ?? How do you test if a CDI is good ? I don't have a flywheel puller so I wasn't able to have a close look at the stator yet and buying a new stator is about 450$.

So far I have been able to use the outboard for about 2 hours correctly and I am tired of spending money on parts that keep failing me over and over. So any idea or helped is welcome.

 

[99yam40]

test the inputs and out puts of the CDI to see what all is in spec and out of spec.
Need a special voltmeter to check peak voltages or a DVA adapter with a regular meter along with a service manual for specs and procedures.

There is a very good chance the coils were not going bad, something else is keeping voltage from reaching the coils