Yeah..... Through a new plug in it. Especially if its the same plug that came with it cause you bought it "used" you have no history on that plug. And besides they are cheap for that car 3.50 I think. Also when you pull it and you say its easy some times and hard others soulnds like you have hydro locked it. meaning you have too much raw fuel in there. Which means you are flooding it.

How many times do you pull it with your finger over the exhaust or how many time do you prime it?