Here is some from ebay, has a picture of what you need and tells you what it fits.
They have some use from $50 to new at $175. So make your choice.
But make sure you really think its it?? I am just telling you what I had, I am not sure thats what you have.
Check under the fly wheel on top of motor, they have magnets there all around, as the motor turns the Magnets go around the Stator, making power and then to the Power pak, then to the coils, to the plugs.
Do you have the book? That might tell you how to test it??
Go to
www.iboats.com and ask there, they are pretty good there also!
Good Luck!! Lets us know what you come up with or if you have any other questions.