Question about Makita DCS6401 20 20",64cc Chainsaw 2 Cycle

1 Answer

My DCS401-16 starts w/difficulty, but won't run long, is leaking.

My Makita worked well until recently, except for fuel leaking and bar oil continuing to seep after shut-off. Now won't run after difficult start. Most recently, will not start at all and fuel leak worse, at top of tank where lines penetrate.

Posted by on

  • Emmet Myers
    Emmet Myers May 11, 2010

    you will need to find out where the fuel is leaking from? is it eh talk or the line or maybe the carb?

  • John Bossolt
    John Bossolt Sep 24, 2012

    Fixed - tear in fuel line, a frequent phenomenon. Stock up on these.



1 Answer

  • 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.


    An expert whose answer got voted for 500 times.

  • Master
  • 2,220 Answers

I suspect you have cracked fuel lines. An open line causes the saw to run lean. To large a leak and she won't run at all. Check your area for a Dolmar (owned by Makita) dealer. They sell red versions of your blue saw and for a nominal fee will be happy to help.
You own a pretty good saw.

Posted on Sep 04, 2009

Testimonial: "Great saw, but fuel flex line is prone to failure."

  • dontbother10
    dontbother10 Sep 04, 2009

    Running it lean can damage the piston and cylinder. Please get it repaired.



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:

2 Answers

Simplicity regency 12 hydro sucking oil into carburetor. what could be the problem?

blown head gasket... it pressurizes the engine causing oil to blow out...
oil is WAY to full

should of mentioned the engine brand because simplicity doesn't make it !!!

Oct 18, 2014 | Simplicity 2691011 - Regent 42" 21HP Lawn...

1 Answer

Fuel getting in oil but not coolant resevoir

You may have a leaking fuel injector. This will allow fuel to run into the cylinder after shutting down and until fuel system pressure bleeds off. Then the fuels seeps along the cylinder wall past the piston rings and ends up in the crankcase. This problem is serious as the fuel in the oil reduces lubrication and the washing of the cylinder wall will increase cylinder wear exponentially.

Mar 05, 2014 | Chevrolet Cavalier Cars & Trucks

1 Answer

Carburetor leaks after engine is shut off

Your carbs bowl float is sticking allowing the gas to continue to flow when the engine is not running.And if you say it is ruining into the engine..check the oil for the presence of gas..if so change the oil,oil filter and remove the plugs and cover the tips to stop spark..turn the engine over to blow gas from the cylinders using a rag to catch the to the fix..either take the carb apart and clean all the parts but there is no way to know if this will happen again..this has happened to my Husky. The best and easy fix is to install a inline fuel shutoff valve..where you can get at it easily...Just shut it off and let the engine use up the carb fuel..and when you start it again turn on the shut off valve let it set until the carb gets full about ten seconds..then start the engine...just got to rmember to do this every time you shut it well for me...good luck.

Feb 06, 2014 | Briggs & Stratton Garden

1 Answer

Gas in crankcase

Fuel from the fuel tank flows to the carburetor and then on into the engine cylinders. From there it seeps into the crank case.
It's a matter of gravity. The gas will seep until it reaches the lowest point in the engine.
There are two methods of correcting this dangerous problem.
1) When you are done using the engine you can turn it upside down, over a large container that is of sufficient size to contain all the gas and oil that will run out of the engine.
2) Turn the fuel valve to it's OFF position when you are done running the engine. This stops the fuel from seeping into the crank case from the carburetor.
(And a heads up from one who has personal, first hand experience. Be sure to OPEN the fuel shut off valve when you think you would like to start the engine.)
If you should have this happen again DO NOT try to start the engine!
(That's one of the reasons The Da always said, "Did you check the oil before you started that engine?")
Dump out all of the oil that has been contaminated with fuel and replace it with fresh oil.

Dec 24, 2013 | Briggs & Stratton Power Products 5,550...

3 Answers

When I first crank it it smokes really bad but it clears up it not getting water in oil or oil in water

the problem is vavle stem seals you would have to take the head off and replace the seals and all gaskets to the head gasket

Feb 17, 2013 | Cars & Trucks

1 Answer

What ratio oil to use dpc7310 73cc 12power

Page 12 - 50:1
1 gallon of premium fuel to 2.6 ounces of quality 2-cycle oil.
4 liters of premium fuel to 80 milliliters of quality 2-cycle oil.
Your OM,%20DPC6411,%20DPC7310,%20DPC7311,%20DPC7320,%20DPC7321,%20DPC8112%20-%20ENG%20&%20FR_owner_English.pdf

It will operate on 40:1, but starting is more difficult and it carbon fouls much quicker. Failure is usually caused by an undetected air leak the additional oil will not preclude it.

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

Apr 21, 2010 | Makita DPC7310 73cc 12" Power Cutter

1 Answer

Oil leakage leakage is prolific oil clean not burnedany idea what could be problem the leak is from the motor

yes rear main seal. does the oil continue to leak after the engine is shut off? also oil pans can seep oil through them. you need to jack carr off the ground and clean under neath with engine clean. spray off. wipe down till dry. start engine till leak starts. shut off. then inspect for where leak is from.

Dec 27, 2009 | Ford Fairmont Cars & Trucks

1 Answer

Brand new Makita MAC2400 is leaking oil.

Send it back Right now do not keep iT NO IT SHOULD NOT BE LEAKING LIKE THAT Paul

Jul 03, 2009 | Makita MAC2400 Electric Powered Air...

1 Answer

Craftsman riding lawnmower shuts off after 15 - 20 mins.

I have a Troy-Bilt push mower that does the same.

Try this - Run the mower until the point of quitting. Keep the hood up and be ready to remove the gas cap. As soon as you feel it start to stutter like it's going to quit, unscrew the gas cap and see if it comes back to life and doesn't quit.

If that works, then what is happening is that the gas in the carburetor bowl is getting depleted faster than the tank can provide it, possibly because of a clogged vent that's supposed to allow air back into the gas tank as gas is used.

You can try running with the gas cap not quite tight, to let some air seep in that way, but that's more prone to sloshing leaks. You could also try drilling a hole in the gas cap - about 3/16" is plenty, and stuffing a piece of natural sponge in to keep the gas in and dirt out. Synthetic sponge will deteriorate in gas.

Jun 09, 2009 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer


first check the oil and see if it is full. the injectors are fired by oil pressure so check those things first.

Jan 31, 2009 | 2005 Ford F 350 Super Duty

Not finding what you are looking for?
Makita DCS6401 20 20",64cc Chainsaw 2 Cycle Logo

Related Topics:

339 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