If you paid $30 bucks for 2 coils than I'm not sure what quality you bought.
I would finish dialing in the motor before I went fishing. Have you done a link and sync?
I have the 87 and it's slightly different. I have the low speed screw on the front and then they moved it to the side so I agree 89...90 all the same really.
Are you having any issues with it?
In Washington state no titles for motors either.
I agree motor is not running on all 3 cylinders. Check spark as well.
The carb number he wants is on this tag.
Yes, next time don't just order a part when you haven't tested what's wrong.
Swapping or testing coils, plug wires.....dirty connections, the list goes on.
Get a spark gap length tool. You can get an inexpensive single one for under $10
Check spark for a 3/8 jump with a good blue snap. Most likely bad spark or crap in the carb. Don't run it with high rpm's in a barrel or on muffs.