From this list if you select Ctrl and F you can type in the numbers 83030M and you will see that it brings up the CDI p/n: 117-TIA02-12
http://www.cdielectronics.com/downloads/CRPL.pdf
If you type in 98715M, the CDI p/n is: R6F0-85540-10-00.
As best I can find is that the 83030M is for the 60 hp engines with s/ns beginning with 675.
The 97815M is for the 60 hp engine with s/ns beginning with 6F0.
You could send a message to Faztbullet here on this site as he may know if they are compatible or contact CDI but at the moment, it seems that you have one for engines beginning with 675.
Gerry