Question about Stihl Hs 81, 86 R, Rc, T, Tc Trimmer Parts Manual

1 Answer

How do I change the clutch drum on my stihl hs81R hedge cutter?

The engine runs ok but the cutter bar does not move back and forward. I suspect that the drive gear has sheared off the drum.

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.

    New Friend:

    An expert that has 1 follower.


    An expert who has answered 20 questions.

  • Contributor
  • 21 Answers

Hi all, I see a few people are in need of this question been resolved so heres the answer.

1st, of all you need to take off the gear box plate using a torx 27 tool to remove the 6 torx bolts.

2nd, you will need to remove the internal spur gear and connecting rods possible the full blade.

3rd, remove the external circlip that holds the drive pinion gear in place.

4th, you will need to remove the air filter cover

5th, next is the 3 torx bolts holding the gearbox casing to the engine 1 is at the back wich can be accessed through the ring that covers the rear anti vibration springs. the other 2 are either side of the casing sunk down a little bit. hopefully these can be easily located.

6th, next is the pull start housing/ top casing.

7th, at this point you should be able to carefully lift the engine out of the lower casing and get access to the clutch drum.

8th from the gear box side carefully tap the drive gear out of the bearing.

9th, give the gear box a good clean out to remove any old oil and any metal filings that may be hanging around.

finally re fitting is pretty much the reversal of this step by step although 1 thing to take into consideration is when putting the new clutch drum in be sure to have something softer than the clutch drum to tap it back into place using the centre of the clutch drum to avoid any possible damage on refiiting.

1 final thing, good luck. and don't forget to refill with grease

Posted on Mar 16, 2015


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How do I change the clutch drum on a stihlHS81R hedgtrimmer?

I have upload the SM for this unit to my google drive so be able to view and download it from there.

STIHL HS 81 86 RA 442 00 01 01 pdf Google Drive

Nov 08, 2014 | Stihl Garden

1 Answer

Stihl hs86 set blade gap

You shouldn't have to set a gap.. the gap between the blades is 'pre-determined' by a spacer between the blades that each 'blade bolt' passes through. You should be able to tighten up the blade bolts and the blades should still move. If they dont, then the spacers are worn and need to be replaced.

Apr 02, 2014 | Stihl Hedge Trimmer Pruner Cutter Blade...

1 Answer

Stihl HS 81 RC

You may be trying to cut material that is too large

Oct 05, 2013 | Garden

1 Answer

Stihl hs81r

The HS81R Is a hand held hedge cutter, not a chainsaws

Oct 15, 2010 | Garden

1 Answer

Stihl strimmer engine runs but wont cut grass the head wont turn what cuts grass

First take the head off and look for grass, weeds and string wound up in there. A lot of times that's the problem.

Next, with the head off and the switch in the off position, pull it over a few times and see if the shaft spins. If not, could be a broken shaft or a bad clutch.

Apr 04, 2010 | Oregon Scientific Complete Carburetor for...

1 Answer

Need alternative spark plug for stihl hs81r

STIHL recomends a Bosch USR-7AC

Nov 23, 2009 | Garden

1 Answer

Chain stops under load ms 660 stihl

your centrifical clutch need to be replaced there is no adjustment,I hope this helps you?

Oct 01, 2009 | Garden

2 Answers

Thihl HL75 hedge trimmer engine will not run at full speed

Remove the cutting attachment, insert a screwdriver in to the shaft receptor and it should operate smooth with a slight bit of friction. if not then check the blade bolts and make sure the blades move freely. Lubricate the blades and the gearbox regularly. If the attachment end is good then turn the driveshaft by hand (with attachment still off shaft). If this too moves freely then go to the clutch.

Apr 04, 2009 | Oregon Scientific Complete Carburetor for...

Not finding what you are looking for?
Stihl Hs 81, 86 R, Rc, T, Tc Trimmer Parts Manual Logo

763 people viewed this question

Ask a Question

Usually answered in minutes!

Top Stihl Garden Experts

Joseph Mueller
Joseph Mueller

Level 2 Expert

338 Answers


Level 1 Expert

5 Answers

ray gallant

Level 3 Expert

46416 Answers

Are you a Stihl Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides