Re: 15-hp Merc with CDI

[David Stanton]

I repaired a 9.9 Merc that uses the same ignition module that’s on the 15 you have a couple years ago – someone at this site gave me a simple Ohm-meter procedure for checking out the module and it quickly showed me it was bad – I can’t find what I did with that procedure – maybe someone will post it for you. I remember replacing it with an aftermarket Mallory module I found online that was a lot cheaper than Mercury or Sierra. Mallory is a very respected name in performance automobile ignition systems.
Your problem could be the module, or the stator that’s under the flywheel.
Dave