Hello Darinself,

I dont think you really need a heavy duty start to start that engine. what I think is happening is 1 you may be flooding the engine when your fueling which makes it hard to turn or 2 its still a new engine so there is alot of compression and 3 make sure your 12 V battery is fully charged .. hey u never know... anyway here is a trick you can do.

Fuel that engine up. (without putting the glow iginiter on ) <~~ read that again very important. I would turn the prop by hand for a few turns, this sometime's loosens the engine up. I would then try to start her up with the starter. If that doesent work, Use the chicken stick a few times and then try to use the starter. Give those a try it should work. Hope i helped.