I need help on where I can get instructions on how changing the starter cord for a 22", 6HP BriggStraton mower.

Start with 7 feet of pull rope.
Remove the blower housing (top cover)
Pull out excessive rope and cut close to rewind housing
Pull other end of rope from the pulley
Rewind the spring until it gets tight, then back off about one to one and a half turns
Place rope through pulley and have a knot in it, and run through the rewind starter cover hole,
Then tie a BIG knot in the long end, and release the rope, the spring will rewind the rope
Then reinstall the blower housing,
Then pull the bail handle at top of handle bars, and pull out enough rope to reach the eye bolt on the handle bar, then run the rope through the handle and tie a knot.
All done