Tip & How-To about Stihl Garden

Piston stop

If you need a piston stop to remove a clutch of flywheel, Simply use a knotted length of pull cord, its safer than risking breaking a plastic piston stop inside the cylinder, or damaging the top of the piston with a metal screw in type of piston stop.

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how do I replace the clutch

Depends on the make and model. Remove the clutch cover and possibly the clutch drum, if it has an inboard clutch. To remove the clutch it a 'clockwise' thread to take them off. Often they will have an arrow showing you the direction to turn them to take them off. You will also need to 'block' the piston too. I prefer to use a piece of pull chord with a series of overhand knots along it, feed it into the spark plug hole, hand turn the clutch clockwise until the piston rises and hits the chord so it cant rise no more. Be careful when you feed it in that its not going into the exhaust port as the piston will shear the chord and leave you with a piece in the exhaust. But its certainly safer than potentially breaking a plastic piston stop off in the cylinder.

Apr 22, 2016 | Garden

1 Answer

how do you change the clutch?

Remove the side casing. (bar side)
Take off bar and chain.
Remove E-clip holding the clutch drum on.
Remove clutch drum and needle cage bearing.
This should expose the clutch.
Remove spark plug.
Use a piston stop to stop the piston rising, Sometimes a knotted piece of pull cord fed into the cylinder is just as good.
Turn the clutch clockwise with a socket to unscrew.

To put clutch back on turn anticlockwise till piston cycles back and hits the piston stop again and tighten. Replace spark plug and clutch drum, bearing, bar and chain and side casing.

Mar 15, 2013 | Stihl 16" Chainsaw Bar Chain Saw 018 025...

1 Answer

cannot remove wornclutch

You need to block the cylinder to stop the piston rising.
I prefer to use a piece of pull cord with 3 or 4 knots along 4'' of it. Its safer than using plastic piston blocks that can break inside the cylinder.

1.Remove the spark plug.
2.Insert knotted pull cord into the cylinder (be careful it doesnt exit the exhaust port)
3.Turn clutch clockwise until piston is blosked by the cord.
4.Place a socket on the centre of the clutch and turn clockwise.

The clutch should just unbolt off the crank shaft. reverse the process when putting on the new one. :)

Jan 27, 2013 | Stihl Chainsaw 045 056 Clutch Chain Saw...

1 Answer

Starter cord will not rewind. How do I get to the coil spring? Is the clutch pressed on? Removing the clutch is the only way, I see, to remove the plastic housing. A breakdown would be very helpful.

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!

Sep 18, 2010 | Garden

3 Answers

removing flywheel and clutch assembly ms 250 stihl

You need a piston stop, watch part of this to explain use:
Make one with starter cord or rope:
I suggest a length of starter cord or nylon rope be used instead of the piston stop (retain 6" ± so you can remove it). Make sure the piston is near the top of the cylinder before feeding the cord or it can fall through the exhaust port and damage the piston as it rises. HTH

Nov 18, 2009 | Garden

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