frickin resistor on '90 nautique

I ran across this huge piece of info over the weekend and now my boat is running so sweet.....


"I had this problem on my boat. I searched and searched. I had the carburetor rebuilt, replaced the ignition coil, wires, cap, rotor, plugs and wires before someone told me about this resistor."

from post:
http://www.wakeworld.com/MB/Discus/m...tml?1183322244

Anyone with an idea of why this resistor existed to start with?
thx!