I want to remove the head on my Craftsman 17" 25cc

SOURCE: REplacing the pulling cord on a gas trimmer

those are usaully under your pull start cover and if its broke you can buy a new rope but if its broke near handle i would open it and retie it to save ya money. but remember to wind spring a little to keep tension on it before pushing it through the hole for handle.

SOURCE: Craftsman trimmer won't prime

A new carburetor would be simplest solution. You could try disassembling the carb, cleaning and replacing diaphrams, but just replacing the carb would be my choice. What is the model # on the trimmer and I can tell you the part # of the carb you need.

SOURCE: How do I spool new line onto this unit? It has a

look on the bottom of the spool and see if there is an arrow point stamped on the outside of the spool, then check if there is an arrow point stamped on the inside of the spool. If so line up the two arrow points and cut two pieces of line about 3ft long. Insert one line into the hole where line comes out and push it until it comes out a little hole on the bottom of the spool. Pull some out and there will be a very little hole (the size of the line) beside the bigger hole insert the end of the line into the smaller hole and then pull it tight. Do the same for the other side. Then twist the spool (like you did to align the arrow points) stop when you have enough line out to reach the line cutter.

SOURCE: I have a 21cc craftsman gas line trimmer part number

1. the main fuel inlet line should have enough line to let the fuel filter set on the bottom of the tank and slide to the side when the trimmer is turned sideways.
2. The screw that holds the inlet needle lever pin on the metering side of the carb gets tightened down and is not adjustable. The adjustment is in the lever itself.
3. the throttle plate would go closest to the crankcase and the choke would be away.
4. The brass inlet that goes directly to the fuel pump side of the carb is the main fuel line ( with the fuel filter on the other end in the tank).
5. the low speed screw ( usually marked with an L or LO) is always the closest one to the crankcase. It should be 1 and 1/2 turns out from bottom ( of course you will likely need to adjust from the starting point- almost all poulans need 2 turns (( craftsman is a poulan)). If there are 2 screws the one furthest from the cranckcase od the high speed. Start at 1 and 1/4 turn out for that. To adjust hold throttle wide open and turn out till you hear that 2-stroke cackle. Turn the screws out for richer and in for leaner. Set the low speed first. Turning out and richening up the lo will drop the idle so you will likely need to turn in the idle screw half a turn for every half a turn you turn out the lo jet. Then adjust the hi for a cackle and good performance under load.

SOURCE: Craftsman weed wacker trimmer head won't turn

it could still have the broken peice from the old one inside the seat.take it apart and look inside and inspect the seat where the drive cable enters.