How do i replace pull cord on on 50 Quantum mower engine?

SOURCE: Troy Bilt Lawn Mower pull Cord broken

there should be four bolts holding the cover on that houses the pull cord assembly take the bolts out look inside you should see the rest of the broken cord at the other end there is a spool that the cord rolls up in to pull the cord until it stops the other end of the cord is a not in the cord pull on the knot the broken peice should come out turn the spool 2 times in the direction that is against the pressre while holding the spool in place feed the new cord in through the whole that you pulled the broken cord out of then tie the cord in a knot wind the rest of the cord up then feed the other end of the cord through the new pull handle tie the cord in a knot put the housing back on

SOURCE: Pull cord broke on my lawn boy mower,new cord won't retract??

I don't know exactly what you have there, but starters in general work pretty much the same. What you have to do with any starter when you replace the rope is to first wind up the spring with the pulley. Turn the pulley in the direction it would be turning if you were pulling the rope. When it's wound tight, back off to align the rope hole in the cover and the pulley. Stick the rope from the outside through the cover and pulley and tie a knot. Then let the spring tension pull the rope into the starter. Hope that helps. Dwain

SOURCE: how to change the starting rope on a quantum xm 50

easy replace coil unit it comes with a new cord easy to change out skill level 2