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McCulloch MT3336 String trimmer-Drive shaft stopped turning came loose at engine end.Anything to beware of disassembling from engine?

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Posted on Jan 02, 2017

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SOURCE: replace a flexible curved shaft

If you go to www.homelite.comin the red area up top click on order parts then click - click to launch homelite parts catalog, then scroll down thru agreement and click agree and then you will need to know your model number and you can get a breakdown of your trimmer wich will give you a good idea of how your machine is put together.

Posted on Jan 05, 2009

  • 376 Answers

SOURCE: Replacing Drive Shaft for a Ryobi 725r

The lower flex shaft should cost around $40, unless you order it online and have to pay shipping. You should be able to get one from your local MTD dealer. (Ryobi is owned by MTD)

Posted on May 25, 2009

  • 1 Answer

SOURCE: Stihl FS45 2 cycle string trimmer. Bought in 5/06

Dealer says shaft has broken. Stihl had a problem with some FS45's doing this. They are trying to have it repaired under warranty.

Thanks for the response.

Posted on Jun 24, 2009

  • 1 Answer

SOURCE: I am looking for a manual for a homelite gas

type in homelitest and ut number on the trimmer and then search google . maybe

Posted on Jul 11, 2009

  • 197 Answers

SOURCE: Ref: Stihl FS46 string trimmer. Broken Flex shaft.

Remove orange sheild,remove single screw holding head in shaft then grab head with pliers and twist side to side until complete head is free.You should then be able to grab part of shaft.On power head loosen screws {about one turn each} that hold two white case halves near trigger,I think there are four,then there is a single torx screw on the bottom of lower case half in the middle that must be taken out to allow tube to be removed.Romove flexshaft from top.Check 4 plastic burnt to flexshaft,if there is you must replace tube liner as well,usally around bent part of tube the liner will go bad.

Posted on Nov 28, 2009

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I have a homelite gas powered string trimmer that does not turn the head when running. what do I do?

3b5f022c-a04d-43e0-9dc1-e67db05c3d82.gifHello Joseph,
This can be a little tricky, but it can be done. First check for obstructions around spindle where string comes out. Check for twine, grass, trimmer line or debris wrapped around bottom end keeping it from turning. If there is nothing there check to see if you can gently turn it by hand, to see if its seized. You may have to disassemble the bottom end of unit from the engine. If you disassemble bottom end you will be able to tell if the problem is in the bottom end or not. Some models have whats called a drive connector which is a metal piece that connects the pto shaft from engine to the shaft that goes to spindle end. Drive connector is number 31 in this diagram. If you post actual model and serial number from tag of unit I can post accurate pics to help. Let me know if you have more questions, good luck!

Sep 10, 2013 | Garden

1 Answer

When my flymo lite 250 engine is running the end does not turn to cut the grass

Could be anything from a stripped drive shaft to a loose or stripped trimmer head. You'll probably need to take it to a repair shop to have them diagnose the problem and locate the replacement parts if it's anything other than a stripped trimmer head bolt.

Nov 01, 2011 | Homelite Mighty Lite Lawn Trimmer

1 Answer

I have a mcculloch string trimmer with no spark? Do I have to replace the iginition coil ? No spark at end of spark plug wire.

I am assuming you held the wire near the engine while trying to start it? If so then you need to either replace the ignition coil or hopefully just the spark plug wire.

If the wire is broken it won't spark either. You can check the wire with a multimeter set to resistance (ohms) and check for infinite resistance, if you get infinite then the wire is shot.

Jun 07, 2011 | Solo 2 Cycle Curved Shaft String Trimmer

1 Answer

I was given a used 31cc trimmer but can't get the spool off to replace it. how do i do this?

A typical trimmer has a small bump knob, an inner spool with the plastic string wound on it and the housing for that which is the string head.To remove the small bump knob, hold string head firmly and turn the bump knob counterclockwise. To remove the head entirely, first remove the bump knob. Next, remove the inner spool with string. What should be left is the spring with the end of the gear shaft showing. Some heads are locked on and some just slip over the end of the shaft. Check the gear drive just above the string head for any holes in the collar. An object can be placed in one of the holes to lock the drive and twist the head off.Ryobi's use retaining clips on the shaft which have to be removed.

May 06, 2011 | Garden

1 Answer

Troy-bilt tb539e head wont spin starts, and idles great but I cant get the head to spin

Since this is a split-boom machine, disassembly and inspection will be required. This unit has basically, 2 drive shafts and a clutch (up near the engine at the end of the engine's crankshaft). There is a drive shaft in the upper boom and one in the lower boom. Either the clutch or one of the drive shafts has malfunctioned.The string head SHOULD NOT spin with the engine idling. There is a centrifugal clutch that engages when the engine reaches a certain speed, in turn, it turns the upper drive shaft.
First, check the string head area for tangled string, wire, line or debris around the center shaft. Long grass can end up wrapped around that area and severely affect movement. Dissasemble the head and inspect. Make sure you can turn the string head by hand. If so, good/
To inpect lower drive shaft, just uncouple it from the upper one. Grasp the end of the driveshaft and turn it. Does it feel OK? Does the string head turn when you turn the drive? If not, you at least have a problem in the lower boom. If all is well, then proceed to inspect the upper boom.
Unscrew the main (uppper) boom from the front of the engine. If you can remove it out of the clutch drum and off then you will be able to inspect it. If the throttle cable and/or wires from the STOP switch are restricting you, you will need to remove the throttle cable from the engine's carburetor and try to get some slack in the switch wires. Those wires go to the ignition coil module under the engine cover.
When you have the upper boom off and can access the drive shaft, turn it to check it. Make sure the other end of it turns. If both drive shafts check out OK, then the clutch will need to be inspected. Post back if needed.

Oct 26, 2010 | Troy Garden

1 Answer

Broken or worn shaft flex. Motor runs and head moves a little with no power. How to remove shaft from housing?

First, about 4 Torx screws hold the end of the flex-drive tube to the engine housing. Remove those.Then, remove the throttle cable from the throttle plate shaft of the carburetor. If any covers are in the way, remove them.If the handle has a stop switch on it, then you will want to remove the wires from the ignition module (unless you can pull the tube out far enough away to access the flex drive. If the stop switch is on the front engine cover, then fine.
Once the tube is free and clear, just grap the end of the flex drive and pull it out. If you reinstall it, reverse it end for end and grease it well with lithium-based grease. Post back if needed.

Oct 25, 2010 | Poulan 25cc 2-Cycle Gas Powered String...

1 Answer

The head stops going round, it sems to me that the drive shaft has become disconnected, can it be repaired by myself.

You need to take the drive shaft tube off the power head and see if it is broken. If the machine has the split boom, then you will need to inspect both. Just turn the end of the drive on one end, and see if the other end turns with it. If it is a one piece drive shaft, then, remove the boom from the front engine cover and turn it, noting if the string head turns too. You can fix this yourself.

Oct 22, 2010 | Homelite Curved Shaft Trimmer Bump Feed...

1 Answer

Weedeater starts fine but the string head will not spin. I removed the string head, and the shaft it connects to is not spinning either.

The shaft cable has either come loose at the head, or is broken at the engine most likely. Is this a 2 piece unit? If so, see if the cable turns with the grass trimmer section removed. If so, it is usually easiest to just replace the trimmer shaft section. One piece units require disassembly at the engine, and if you are not mechanically inclined, that can be a pain.

Apr 15, 2010 | Homelite Curved Shaft Trimmer Bump Feed...

2 Answers

McCulloch mt 700 weed wacker,the weed wacker will not spin to cut the weeds

If the motor is running another possible solution is you have a broken drive shaft spring PN-753-04280 To check this remove the screw which holds the **** pipe to the motor and loosen the clamp. The **** pipe should pull right off the motor exposing the end of the drive shaft spring. Pull the end of the spring, if it comes out it is broken.

Jul 06, 2009 | Garden

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