it depends on the lhs, there was one outside philly, when i was checking it out while visiting relatives..(hobbytown USA) they wanted $40 plus supplies (which im guessing is nitro) for breakin.....the motor in the rotostart could have went bad from the motor not being broken in all the way and needing too much torque...you can still use a cordless drill to do the trick...just be careful the drill doesn't have too much power, i dont know what everyone else is using here.

but i've ran over a gallon of gas through my rig, and i still have to crack the glowplug to get the rotostart to work, and i have a 3300mah battery (dont think that makes a difference tho)