Question about Garden

1 Answer

Is there a way to unstick the piston?

This chainsaw is practically new. It ran fine a few weeks ago. Now recoil assembly is fine. Flywheel won't turn. With spark plug removed, it seems the piston is stuck. Is there a way to unstick the piston?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Garden Master
  • 77,932 Answers

Use cutting oil (ATF Fluid works well) and let it soak overnight, if that doesn't free it you need to remove and rebuild the engine. You can (after waiting for the oil to work) try a wooden dowel that will fit in the spark plug hole and then hit the dowel to try and free the sticking piston, use finis, tap with only moderate force repeated times.

Posted on Dec 08, 2016


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.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Echo chainsaw ran fine a few weeks ago. Today it won't turn over. The recoil is fine. The flywheel won't turn.

Pull the spark plug out of the saw and put a little cutting oil in the cylinder and try to turn it over.

Dec 08, 2016 | Echo Garden

1 Answer

New coil for chainsaw

the coil is on the flywheel side of unit. remove the recoil cover and you will see the flywheel and coil. your have to remove the ground wire from shut off switch and two bolts holding coil in place. when installing new coil you need to leave a 10 thousand air gap between the coil leg and the flywheel magnet for proper operation

Oct 10, 2014 | Husqvarna 350 18 Inch Gas Chainsaw 52CC...

1 Answer

Stihl chainsaw backfires out the carburetor

I would suspect the key in the flywheel has sheared off. This would allow the magnet on the flywheel to be in the wrong spot and cause the magneto to dump its charge into the spark plug when the piston is below the exhaust port. If you remove the spark plug and stuff some rope in the cylinder to keep the piston from going all the way up you should be able to loosen the nut on the flywheel and remove it to check. On my 039 the key is part of the flywheel and you wheel need to buy one if it is sheared.I did not torque mine when I changed engines and it ran two weeks before it slipped .

Oct 04, 2014 | Garden

1 Answer

The recoil starter assembly has shattered on my gardentec chainsaw. can I purchase a new assembly?

I'm not familiar with the model 'Gardentec' is it a Ryobi product?
In many cases now and especially on cheaper hobby saws the starter pawls are not available as individual items. However I'll explain the process of replacement.
Firstly, remove the starter housing and the plastic shield fitted to most saws between the starter pulley and flywheel. You will now have to remove the flywheel. The centre nut is a normal R/H thread but you will have to lock the piston first.
Remove the sparkplug and if a piston lock tool is not available then a length of starter rope will suffice, Turn the engine over by hand until the piston is opposite top dead centre (furtherest from sight) then push as much of the starter rope into the hole as you can. This will stop the crankshaft from turning when you undo the flywheel nut. Once the nut is undone your next step will be to remove the flywheel and they seldom slip off easily. In many cases a puller will be required but use caution or the flywheel will shatter. Do not hit the flywheel with a hammer or damage will occur. Light pressure can be applied at opposite sides of the flywheel by inserting two screwdrivers and lightly levering. Do not use too great a force.
If these process fail to produce results then you should seek the help of a chainsaw service shop.
Now once the flywheel has been removed you can turn it over and insert a pin punch to drift out the pawl pivot pins.
Reassembly is a lot easier.

Mar 22, 2014 | 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

1 Answer

Weedeater pull cord won't pull out on a leaf blower

Suggest to remove recoil housing/assembly and try to rotate the flywheel. Remove the spark plug & check for a silver or aluminum color or coating.
If the flywheel will not turn by hand, the piston/cylinder is seezed. No further repair is affordable.

If the flywheel turns by hand and the spark plug is a dark brown color, then focus your attention to the recoil assembly to see if rope is bound or wound around the rope rotor.

Nov 10, 2009 | Poulan Garden

1 Answer

Recoil problem

Hi there .
You can try to remove the recoil starter and turn the flywheel by hand . If it turns by hand you have to replace the recoil starter if it does not turn by hand that means the piston is seized and you have to replace the piston ans probably the cylinder . To do that you need some mechanic experience .
Hope this help

Sep 02, 2009 | Poulan Wild Thing 2375 18" Gas Chain Saw...

2 Answers

How do you remove the recoil starter cover. I

which kind of chainsaw, make, model, how old?

Jul 09, 2009 | Garden

1 Answer

How to replace recoil assembly on roybi 780r

have ryobi 780r and primer bulb won't show fuel pressed and fuel comes out of fuel cap,i have pressure in fuel tank. it ran 2 weeks ago great?

Jul 01, 2009 | Ryobi Garden

Not finding what you are looking for?
Garden Logo

Related Topics:

44 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

Dennis Key
Dennis Key

Level 3 Expert

2478 Answers


Level 3 Expert

661 Answers

john h

Level 3 Expert

12744 Answers

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

Answer questions

Manuals & User Guides