Question about Troy Bilt Tb70ss Gas Trimmer

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Starter cord has detached internally and I cannot get to it

I have taken every screw out but cannot rmove the plastic cover to get the starter cord and its connection. The cover is loose but the metal part which rotates and links to the cable in the shaft is stopping me. I have tried some force whithout success and suspect I need a special tool to go inside and unscrew this part. It has a small internal diameter and no screwdriver I have will fit (and I cannot see what is at the bottom anyway)??

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  • Anonymous Sep 28, 2008

    not detatched but will not rewind - can't seem to find my way inn

  • Anonymous Oct 19, 2008

    I have the same problem bad starter assembly but can't get to it to fix it.

  • tgtree Dec 18, 2008

    with only about a dozen uses, the TB70SS is now completely useless. The starter rope - the pull rope that actuates the starter, has broken. As with other users, I could not discover a simple way to access the pull rope, and the schematics are a little scary. Anybody know how to do this? Or should I take it to a pro.

  • Anonymous Apr 22, 2009

    I have the same, I can't get in to rewind the starter rope. Is there a schematic I can view?

  • kjestimate May 11, 2010

    The TB70SS has a #20 torx screw that holds it on. Once the clutch cover is off, however, the clutch assembly is still in the way. Do I need a puller to get the clutch off of the shaft?

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Depending what make and how old the machine is,usually there is a torx screw in the middle of the clutch drum(metal part that rotates).you will need to use a piston stop,to stop the engine turning while trying to undo the torx screw. i am assumig the starter is in front of the engine not at the back. once the screw is undone the clutch will come off and so will the starter cover. neil

Posted on Dec 19, 2008

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I can't get in to change the starter cord on troybuilt TB90BC. There is a round metal piece which just spins. This will not allow the plastic cover to slide off revealing the starter cord attatched...


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If that is the case, then disassembly will be required. That is the only way to fix it. If you choose to do so, here are the instructions:
Remove the tube that holds the flex-drive shaft from the front of the motor cover.Remove the rear engine cover. Remove the throttle cable from the carburetor. Mark and unplug any wires for the on/off switch that go to the ignition coil (underneath front cover) if possible. Now if you have pulled the driveshaft tube out of the way, the clutch drum is up next. Inside it, screwed into the very end of the engine's crankshaft is a Torx #25 screw. Before you loosen it, you will have to lock up the engine. To do so, remove the spark plug. Pull on the starter until the piston is down, then insert a length of clean, soft rope into the engine. The engine will come up and compress the rope, thus locking it in place to allow clutch drum and clutch removal. Loosen the T-25 (Star bit or Torx head) screw inside the drum.. You may be able to remove it with a long thin-blade screwdriver also.It probably won't come completely out...it is made this way. Next, remove the clutch. It is screwed onto a small threaded section of the crankshaft Removal is counterclockwise.. It will be pretty tight. To help, apply peneterating oil. Whack the ears of the clutch near the center with a hammer and a dull flat-blade chisel or a small piece of wood unless there are bolts. then use a wrench. It will turn counterclockwise for removal and there will probably be a removal direction arrow on it's face. After getting that off, remove the Torx screws holding the cover to the engine. The starter unit should be mounted inside as it mates with the top of the flywheel to start the motor. Remember to preload tension (5-7 turns) on the starter unit. Make sure the handle is installed. Jam the unit with a screwdriver or vise grips so you can insert and tie off the new rope. Then remove jam device and let recoil pull your new rope into place while holding the handle. Reassemble and you are done. Disassembly requires Torx head drivers and a good flat-blade screwdriver. Post back if needed.

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My wiper sniper pull cord is broken, how do u change the pull cord?


Hi vanzedo, I will try to help you out. Because you don't specify the brand and model I will try to give you the Weed Eater brand that is manufactured by Poulan because it is the best known in my area and I hope it is well known in your area, but it is pretty well the same procedure for other brands.
To disassemble starter, detach starter housing from engine. Remove rope handle and allow rope to wind into starter. Unscrew pulley retainer or pulley retainer screw and remove rope pulley. Wear appropriate safety eye wear and gloves before detaching rewind spring from housing as spring may uncoil uncontrolled. Try to prevent spring from unwinding if possible, I use a flat piece of metal stiff enough not to bend, about 1" wide or less and try to put it between the spring and pulley, if I have the room to do it and prevent spring from uncoiling as it is quite a job to put it back in. (good luck with that one).
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I hope this is helpful to you even if a little bit. Regards and good luck. Denis.

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Hi b calm,
I will try to help you out. Because you don't specify the brand and model I will try to give you the Weed Eater brand that is manufactured by Poulan because it is the best known in my area and I hope it is well known in your area, but it is pretty well the same procedure for other brands.
To disassemble starter, detach starter housing from engine. Remove rope handle and allow rope to wind into starter. Unscrew pulley retainer or pulley retainer screw and remove rope pulley. Wear appropriate safety eyewear and gloves before detaching rewind spring from housing as spring may uncoil uncontrolled. Try to prevent spring from unwinding if possible, I use a flat piece of metal stiff enough not to bend, about 1" wide or less and try to put it between the spring and pulley, if I have the room to do it and prevent spring from uncoiling as it is quite a job to put it back in. (good luck with that one).
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I hope this is helpful to even if a little bit. Regards and good luck.

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1 Answer

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I always describe this solution in detail, and am going to include pictures this time. Here are online instructions with pictures, followed by my directions.
http://www.ereplacementparts.com/article/1771/How_to_Remove_a_Trimmer_Clutch.html
Here are my instructions to aid you.
(Yes, the Torx screw inside the clutch drum is a right-handed thread)
Remove the tube that holds the flex-drive shaft from the front of the motor cover.Remove the rear engine cover. Remove the throttle cable from the carburetor. Mark and unplug any wires for the on/off switch that go to the ignition coil (underneath front cover) if possible. Now if you have pulled the driveshaft tube out of the way, the clutch drum is up next. Inside it, screwed into the very end of the engine's crankshaft is a Torx #25 screw. Before you loosen it, you will have to lock up the engine. To do so, remove the spark plug. Pull on the starter until the piston is down, then insert a length of clean, soft rope into the engine. The engine will come up and compress the rope, thus locking it in place to allow clutch drum and clutch removal. Loosen the T-25 screw inside the drum.. You may be able to remove it with a long thin-blade screwdriver also.It probably won't come completely out...it is made this way. Next, remove the clutch. It is screwed onto a small threaded section of the crankshaft Removal is counterclockwise.. It will be pretty tight. To help, apply peneterating oil. Whack the ears of the clutch near the center with a dull flat-blade chisel and hammer unless there are bolts. then use wrench. It will turn counterclockwise for removal and there will probably be a removal direction arrow on it's face. After getting that off, remove the Torx screws holding the cover to the engine. The starter unit should be mounted inside as it mates with the top of the flywheel to start the motor. Remember to preload tension (5-7 turns) on the starter unit. Make sure the handle is installed. Jam the unit with a screwdriver or vise grips so you can insert and tie off the new rope. Then remove jam device and let recoil pull your new rope into place while holding the handle. Reassemble and you are done. Disassembly requires Torx head drivers

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1 Answer

I broke th pull cord on my ryobi ss26 weed wacker.took it apart to restring is there a certain way it must go back together? does the cord through the little hole thats on the spool? if possible can i get...


There should be a hole in the pulley that holds the starter rope in the starter/recoil unit. If you have taken the machine apart to that point, yes, there is only one way to reassemble it.
You will have to wind the starter recoil without the rope installed on itabout 5-6 complete revolutions to "pre-load" tension on the spring-steel starter spring, then lock the pulley in place, insert the pull rope and tie it off so it can come back out and then release the pulley, letting it draw in the new starter cord. Make sure you have the handle installed so it will stop when it gets to the body of the engine cover.

Sep 22, 2010 | Ryobi 15" Electric Factory Reconditioned...

1 Answer

How do i replace the started cord on my ryobi weed wasp


Broken starter ropes or failure to retract are both repairs that are fairly easy. However, the spring can be nasty as it is under tension (or should be when reassembled). This can be risky if you are not familiar with the internal construction as you disassemble the unit.

The cause of a broken cord is obvious. The cause for a failure to retract could be a broken spring, tangled or frayed rope, or some other mechanical failure. A broken spring will require total disassembly of the starter mechanism - fortunately there really isn't that much involved.

With some designs, it is possible to replace the cord without fully disassembling the starter mechanism - by threading the cord in and tying a not in the end - but after rotating it several turns to put the proper tension on the spring. This is relatively safe but may be frustrating as 3 hands are sometimes needed.

Where safe disassembly is not obvious, I would recommend that you refer to a book on lawn mower or small engine repair from the library or the service manual for the mower, if possible. You may be able to find specific step-by-step instructions which will minimize your risk of injury from an encounter with an uncontrolled spring.

When the rope pulls out and retracts normally - but doesn't do anything else - the most likely cause is a problem with the one-way clutch. This may be part of the spring-rope assembly - usually removable as a unit - or attached to the flywheel. The most common problems are gummed up lubrication or a broken spring or other damaged or worn parts.

anyway... there is a torx screw in the middle of the clutch drum(metal part that rotates).you will need to use a piston stop,to stop the engine turning while trying to undo the torx screw. i am assumig the starter is in front of the engine not at the back. once the screw is undone the clutch will come off and so will the starter cover.(source: neil)

Thanks for using Fixya

Have a nice day!

Mar 18, 2009 | Ryobi 15" Electric Factory Reconditioned...

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