another FYI, during my Warhead break in I too had a real bad time getting it started with the pull start. Had way too much compression during the break in time, so I cheated and bought a bump start (which saved my truck in the end, cause if I would have had to keep pulling it I woulda ended up throwing it off a 10 story building
).
But, as time progresses, after about tank 9-10, the engine was VERY easy to start. So keep with it, or buy / borrow a bump box.