I need help, no spark

[ZacB08]

So I’m not sure why I wasn’t able to enter in my info correctly but I have a 1994 Sea Ray, Sea Rayder with a Mercury 3 cylinder 2 stroke engine.

The boat ran fine when it was parked but sat for about 4 or 5 years. When I got the boat I put a new battery and starter on it and was not able to keep it running for longer than a minute or two at a time.

So I first looked at the wires and they seem just fine. I’m not getting any spark on the lower cylinder and I think the first part I should replace next is the ignition coil but I’m having trouble finding the right part.

If anyone has any info on this issue, I’d appreciate some input. Thank you!

 

[Marvin willis]

Have you changed your plugs recently?

 

[ZacB08]

Yes, sorry I didn’t realize I left that part out. The plugs were actually the first thing I changed when I couldn’t get it to start

 

[Marvin willis]

If u have switched the wires around and still no spark on that cylinder then yes.

 

[TeenGee]

We had an 1970's vintage 115 Evinrude (sp?) 2-stroke. The CDI module went bad and at low rpm only 1 cylinder would fire. At higher rpm they would all fire. The failure was in a diode that would leak down voltage at low rpm but maintained enough voltage to fire at high rpm. Search for "how to test cdi with multimeter".

 

[ZacB08]

Thanks for the tips! Wish me luck