Drive Sprocket (Part 2)...

In the previous post we looked at removal of the drive sprocket from a Stihl chainsaw, which uses an inboard clutch (which makes removal very simple).

In this post we'll take a look at the slightly more awkward procedure when dealing with machines fitted with an outboard clutch - in this example we'll be using my Husqvarna 350 chainsaw. Find out more, and watch the video, after the jump...

Those chainsaws that use an outboard clutch need to be tackled differently from those fitted with an inboard clutch. Husqvarna, Partner and the Stihl climbing saws all utilise outboard clutches.

The issue with these machines is that the clutch actually prevents you from removing the drive sprocket, and attempting to undo the clutch weights just turns the engine over (let alone the fact that it's threaded the 'wrong' way).

So, remove the drive sprocket from these machines is a bit more involved; here are the steps:

  1. Remove the side plate, bar and chain.

  2. Remove the engine cover to gain access to the spark plug.

  3. Remove the spark plug and fit in a piston stop tool.

  4. Knock the clutch weights off (remembering the thread is reversed).

  5. With the weights off, the drive sprocket can be removed along with the roller bearing.

The following video, although based on the Husqvarna 350 chainsaw, should be relevant to all chainsaws fitted with an outboard clutch.


Anonymous said...

your video is very helpful,however it didnt mention the occurance of broken clutch springs,or how to replace them.

David Vickers said...

Thanks for the comment - clutches is something I've yet to cover (how they work, components and how to replace).


Anonymous said...

Hello, followed wahat you did on video exatly,on same saw,i seem to have damaged the cylinder in doing so as saw dosnt start. Is this repairable or is new cylinder needed.
Thanks David

Anonymous said...

Hello. First i must give you credit for this site! It si verry helpfull. Secon of all i would like to ask you a question. I have a husqvarna 266xp (it is an older model). The question is... is the procedure of replaceing the drive sprocket same? Thank`s for answering the question. Keep up the good work!

David Vickers said...

david: just what have you done to the cylinder?! You did use the proper piston stop tool didn't you?

anonymous: although I don't have experience of the 266XP, if it's an outboard clutch machine the removal procedure should be very similar to the one shown.

Paddy M said...

Can you give me a web address for anyone who stocks the piston stop tool shown in the video? I've tried searching online but can't find anything similar. Thanks in anticipation.

husqvarna chainsaw part said...

That's a great video the video will help to proper use of chainsaw.