I can pull the spring assist starter cord but it stops at the point where it used to turn the engine over.It acts like the engine is seized up and will not turn over. Any suggestions on where to start troubleshooting the TB70SS (Troy Bilt)?
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Hi Eric. Firstly remove the starter head then turn it over. Turn the inside disc anti anti clockwise until the spring stops turning. Get some help from someone else to thread the new cord through the spigot and tie two knots in the end together. Slowly release the spring and the new cord should go into the starter. Job done. replace on the mower and off you go.
Remove the starter assembly from the engine and pull the cord out--it should have spring resistance to pulling. If nothing, the rewind spring may be broken, or it may have pulled loose from one of the attachment points. Remove the cord from the pull handle and unwind it from the spool if it isn't already pulled out. Remove the spool from the frame to expose the spring--check the ends for breakage and the attachment points for damage (one will be on the under side of the spool). Repair or replace any damaged components and assemble the spring into the attachments. Wind the spool/spring about 2-turns CW, then wedge it to prevent unwinding. Fit the cord back into the spool and wind it CW until the cord has about 8" or so to feed out through the cord port. Fit the cord end back into the handle, tie an overhand knot, and push the knot into the handle bore. Remove the spool wedge and try pulling the cord several times to make sure it goes out and back smoothly. Return the starter to the engine and attempt starting. Hope this helps!
The starter is on the flywheel side of the engine, not the clutch side. The whole starter mechanism should release from the left side case with the removal of three of four screws. Likely, you will find a broken rewind spring end, or it has slipped from a fastening point on one end or the other. Remove the starter cord to deal with the spring which should have several turns in a CCW direction to pull the cord back into the starter housing. If you need to make a fresh knot in the cord, be sure to melt the end to prevent the knot from pulling out. Hope this helps!
If the rope recoils back into the starter, at least the starter spring is not broken...but...if you can break the unit down to where you can get a good look at it, you may find that the ratchets on the starter pulley are not engaging with the pawls on the flywheel...The pawls are spring loaded so they engage and then drop out of the way when starting, See if you can break the machine down to that point and post back,
Yes you can put the spring back in but it takes patience. Wind the spring inside the pully first. Then install the cord on the outside of the pully. Make sure you wind both in correct direction. You probably should replace the cord while you have it apart. The parts would be listed by the engine brand and model number, not by MTD. Probably a Briggs & Stratton engine? You can go to their web site :www.briggsandstratton.com to get part numbers. Or you can try a place like www.jackssmallengines.com
No, you have to connect it at the inner point, then wind the spring around keeping it fairly tight all the time. You will eventually be able to reconnect at the outer point on the spool. Usually, it's best to remove the starter cord from the spool until the spring can be attached. Wedge the spool so that it can't unwind the spring and refit the cord (make sure it is in good condition). Usually best to remove the handle to facilitate the stringing process. Make sure there is enough slack in the spring so that it can be tightened at least 4 turns more (when pulling the starter). Melt the cord ends a little to prevent the knots from pulling out with use. This is something like setting a bear trap, so use care at all times. Good luck!
Replacing the spring on this tiller can be tough. You have to get the tension spring set into the stop and partially wind the tension (by turning the cord pulley) and THEN attach the cord before completing winding the tension spring. It took me about an hour to figure out how much preset of tension was needed before I was able to get it to work. You have to partially preset tension because starting from zero will not fully rewind the cord.
NOT SURE IF YOUR STARTER IS PART OF THE COVER BUT IF IT IS IT CAN BE A BIT TRICKY AS SOME MACHINES YOU HAVE TO REMOVE THE STARTER WHEEL TO GAIN ACCESS TO REMOVE WHAT IS LEFT OF THE OLD CORD AND THEN FEED ANOTHER CORD THROUGH THE HOLE. UNDER THE STARTER WHEEL YOU SHOULD HAVE A LARGE COILED SPRING WITH A CIRCULAR HOOK POSSIBLY ON THE END WHICH HAS TO ENGAGE TOO THE UNDERSIDE OF THE WHEEL, ONCE THAT IS DONE YOU HAVE TO PULL THE ROPE INTO A NOTCH ON THE WHEEL BEFORE YOU WIND IT AROUND THE WHEEL, TURN THE WHEEL IN THE DIRECTION THAT THE COILED SPRING END WAS POINTING UNTIL IT STOPS, BACK IT OFF 1 TURN FEED THE END OF THE CORD THROUGH THE HOLE IN THE BODY OF THE COVER AND PUT A LOOP IN THE CORD NEAR THE HOLE TO STOP THE CORD FROM WINDING IN, THEN PUT THE RUBBER PULL END ON THE CORD AND TIE A KNOT IN THE CORD BEHIND THE RUBBER PULLER TO STOP THE CORD FROM PULLING BACK THROUGH THE HOLE.
rELEASE THE LOOP IN THE CORD NEAR THE COVER HOLE THAT YOU PUT IN AND LET THE SPRING WIND THE CORD BACK IN TO THE STARTER WHEEL
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)
Please note ! patients is required with this one !
Hi, remove the recoil top cover with the recoil attached. ( DO NOT TAKE OUT THE SPOOL OR YOU COULD HAVE THE SPRING GET YOU IN THE FACE)
Remove old cord.
With your new cord lace it through the recoil spool centre hole with a knott on the end.
now depending if the recoil winds in clockwise when spool is facing you wind the cord around it a few times by turning the spool clockwise,
Then put the cord in the notch at the side of the spool & wind the spool & cord anticlockwise about twice the number of turns of cord (this should tension the spring).
Take your end of the cord & lace it through the hole outside of the casing & fit you pull handle.
But hold the spool firmly untill the cord has a good knott on the end of it.
(Sometimes I see the guys here putting a loop in the cord to stop it sliping in while they tie a knott on the end of the handle.)