I had a similar one to the heli max for a nitro truck. It would roll the motor ok but burned out after about twenty starts. If your engine does not start right away I dont think this is the starter for you. I have the Tower Hobbies one listed at this link.
http://www2.towerhobbies.com/cgi-bin...&I=LXL396&P=ML It starts my hyper 50 easily and does not over heat if it is being fussy