Try using a standard glow igniter instead of the EZ start.My buddies maxx never starts with that thing and thats how we get it running.Just put the glow igniter in place of the wire and push the button to turn the engine over and see if it starts.If now try resetting the needles and then tune it again.What kind of compression does the engine have?You said you bought it used so I was just wondering if you checked that or not.