Question about Makita DCS640120 Commercial Grade 20Inch 64cc 2Stroke Gas Powered Chain Saw

2 Answers

I have a Makita DCS640120 Commercial Grade 20Inch 64cc and when i turn it on the chain automatically moves how do i fix it to where it will idle till i press the trigger?

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

If clutch springs are not broken turn down idle screw until chain stops spinning

Posted on Apr 25, 2013

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 4,088 Answers

Turn the idle speed screw CCW till the chain stops turning at idle, but the engine continues to run. Make sure the carburetor fasteners are tight. Remove the chain cover, bar, and chain. Spin the outer drum of the clutch to check the bearing which lies between the drum and internal components. If it doesn't spin freely, try oiling the drum bearing area and work it into the bearing. If no help, plan on replacing the clutch mechanism. Hope some of this helps!

Posted on Jul 13, 2010

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

Trouble starting chain saw

check for spark and install new spark plug take off air filter check for fuel

Feb 12, 2015 | Makita DCS6421 64cc Chainsaw with 20" Bar...

1 Answer

How to ignition time this?

The ignition timeing on all modern chainsaws is controlled by the flywheel magnets, the flywheel key, and the core of the ignition unit, so other than checking the key has not sheared, and you have the correct air gap between the unit and the flywheel ( 0.3mm ) that is as much as you can do.

Jun 24, 2011 | Makita DCS640120 Commercial Grade 20Inch...

1 Answer

Need the parts brake down for a makita chain saw DCS6401

Click on the icon that is labeled parts breakdown to the left of the chainsaws picture.

I hope this helps!

Nov 24, 2010 | Makita DCS6401 20 20",64cc Chainsaw 2...

1 Answer

What should the compression be for the makita dcs34?

As far as i am aware it sould be between 60 - 80 PSI, 40 - 60 psi indicates ware any lower than 40 no hope

Sep 07, 2010 | Makita DCS34 Commercial Grade 14Inch 33cc...

1 Answer

Makita DCS6401 wont idle. When the gas is released the chainsaw shuts off.

Try turning the idle speed screw CW (not the jet screw marked L) one full turn to increase speed. Normally, this is set so that the chain stops moving, but the engine continues to run. Hope this helps!

May 13, 2010 | Makita DCS6401 20 20",64cc Chainsaw 2...

1 Answer

Chain fell off

That often creates burrs, this may help with removal, Your OM is excellant for installation, maybe the best I have seen.

See pages 19 & 20.

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH

Apr 08, 2010 | Makita DCS6401 20 20",64cc Chainsaw 2...

1 Answer

How to adjust a mcculloch 610 chainsaw carberator

there are two screws on the card of youy chainsaw one is the slow running jet the other is the full throttle jet start up saw run it till its hot adjust slow running jet first till saw ticks over ok then adjust fast running jet till you have full throttle,, start with both screw turned in to one and a half turns then adjust from there

Mar 28, 2010 | Makita DCS6401 20 20",64cc Chainsaw 2...

1 Answer

We have dcs6400 and this tool is making a huge noise when we start it and also the tool is looked as it gets overheated very soon even on idle running. please suggest the grade of oil to be used along with...

2-cycle oil mixed at 50:1
1 Gallon of premium fuel to 2.6 ounces of quality 2-cycle oil.
4 Liters of premium fuel to 80 CCs of quality 2-cycle oil.

Your OM can be found here:
Makita Canada Inc:

Good Luck. HTH

Feb 23, 2010 | Makita DCS6401 20 20",64cc Chainsaw 2...

Not finding what you are looking for?
Makita DCS640120 Commercial Grade 20Inch 64cc 2Stroke Gas Powered Chain Saw Logo

100 people viewed this question

Ask a Question

Usually answered in minutes!

Top Makita Garden Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers


Level 3 Expert

2428 Answers

Paul Sikkema
Paul Sikkema

Level 2 Expert

171 Answers

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

Answer questions

Manuals & User Guides