I have a 4 cycle Troy Bilt TB144 cultivator and the pull chord does not catch

about the thickness of a match book or business card is usually sufficient

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take your cover off then you take off your spinny thing out and take the old rope off the spinny thing and tie your new rope in it then twist it tight if its old or if its new dont worry its auto set then put it all back the way you took it off

It possible that the PVC is stuck closed or the hose attach form the PVC to intake manifold is either pinch shut or the hose has

collapsed, not allowing the crankcase to have a negitive presurre. The other possiblity is the cylinder rings may have to much blow by thus forcing the oil out throught the dip stick tube. Check the PVC system first.

I have a new troy built garden cultivator (modelGC720). It won't turn and the motor stalls when the trigger is pulled. Should I return it or is there a easy fix ?

It sounds like it might be seized up. Pull the spark plug out and see if you can pull the cord that way.
Let me know what you find. How old is your machine?

Jim

remove the top cover. look inside while pulling rope briskly, you should see two dogs fly out and retract when the cord reaches its end. if not, check for dirt in the system and clean out. if no dogs, you will have to remove the system from the housing, be careful of the spring. check for any broken drive parts. also check flywheel cup for damage where the dogs come into contact with it.

im 99 percent sure all you have to do is get the carburator cleaned out.

it sounds like you need a new sparkplug. Bring the old sparkplug to auto zone and tell them to give you the same kind.

yes exactly what i would do sounds like the springs are either worn or gummed up or just broken on the dog ears

This type of pull starter design is very poor and fails often. Cheap parts and cheap design leads to poor performance and yet Troybuilt still doesn't give free parts or an upgraded design.