Tecumseh LH358SA engine won't start

Tried starting my snowblower up today, and when turning the choke knob, it was extremely tight. Manage to work the knob back and forth and finally got it to full choke. This engine does have electric start, and after priming the engine, all it would do when I attempted to start it was turn over. The engine did not sputter or anything. Thinking it could be a plug, but with the stiffness of the choke knob, that makes me suspicious. Should I look for a kit (if someone could suggest a part number for a rebuild kit, that would be awesome) or buy a new carb. Thanks.