i have a homelite trimlite weedeater model ut2004b?

i have a homelite trimlite weedeater model ut2004b that was in storage for about 4 yrs and after i took it out i could not start it well i decided to take it apart and clean it throughly and i had took off the coil from the motor housing but now i can not figure out the proper distance for the coil from the magnet and now it will not start at all,what is the measurement that i need to have to reset the distance,so i can start up the engine without any problems and being able to fire correctly.