Question about Makita 5012B 12'' Electric Chain Saw

1 Answer

Makita 5012B chain cannot be tightened

My Makita 5012B electric chainsaw has a bar adjusting screw to tighten the chain, but is limited to half of its potential screw length by a metal stud that aligns the bar but also limits the bar from being able to adjust forward (tightening the chain), so that only about 1/2 of the adjuster screw is even usable. My chain as a result, has about 1 1/2 - 2 inches of "belly" below the bar at maximum tightness. This makes it unusable. I either need a different chain (shorter), a larger sprocket in the drive mechanism, or a bar with a different hole for the adjusting mechanism to engage with. This must be a mistake. The saw has less than 15 minutes of use and has never had the chain sharpened. Is there another chain length for this saw available, or another bar configuration, or another drive sprocket (larger) that I can get? Is there some secret adjustment I am missing? This is very frustrating. Anyone?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 22 Answers

Some chainsaws have different knotches where the bar locks onto the saw. loosen the nuts and see if you can move the bar.

Posted on Dec 13, 2008


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

Adjusting an electric chainsaw bar and chain

UN PLUG FIRST THEN Loosen the bar and lift with the chain then tighten with a screwdriver the screw is normally found at the front beside the bar re tighten the bar the chain should not be over tight check chain oil

Jul 17, 2014 | Poulan 16Inch 30 HP Electric Chain Saw...

1 Answer

Chain tension

Pick up on chain and tighten until the teeth that run in bar groove are half way in the groove, to tighten loosen bar nuts on side of saw. There will be a screw either on bottom of saw on bar side or between bar and dawg( three or four pointed thing you see next to bar). Tighten screw as you turn the chain until when you pick up on chain it will raise the teeth that go in the bar groove to about half way. Do not over tighten or will burn up the bar, better a little loose than to tight. Don't forget to re-tighten bar nuts.

Feb 10, 2014 | Ryobi Garden

1 Answer

Tighten chain on WEN 5041 electric chain shaw?

First loosten that 1/2 bolt on the bar--the lookat the bar when it goes into the housing you will see the adjustment screw.Tighten the chain by turning the screw when you get it to where you want it then tighten the 1/2 inch bolt

Nov 05, 2011 | Electric Chainsaw Sharpener

1 Answer

Chain dowsn't stay tight

Between the chain bar and the body there is an adjusting screw, if the adjusting screw is stripped it will not pull on the chain bar to tighten the chain.
procedure for tightening chain. loosen the chain guard nuts, tighten the bar adjusting screw by turning to the right or clockwise, the chain has to roll freely around the bar but not bind. check with gloves or rag, don't use bare hands to avoid accidents. once chain is adjusted, tighten the chain guard nuts. good luck!

Oct 16, 2011 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

What oil can I buy ... say at Loews ... for my makita 5012b

At Lowes, you can purchase this item:

Husqvarna Bar And Chain Oil

Lowes Item #: 193431 ' Model #: QUART BAR / CHAIN OIL

Good luck


Please rate FIXYA

Apr 26, 2011 | Makita 5012B 12'' Electric Chain Saw

1 Answer

What size replacement chain do i need for a makita 5012b chainsaw

I went here:
Oregon Bar & Chain Selector
Chose :Makita;5012B;12";All:All:All"
There are different gauges and numbers of drive links depending on the bar in use. Please for your safety stop in a local saw shop with your existing chain. It can be used as a template to fabricate a replacement in a few minutes (inquire about gauge and # of drive links). Once you have a new one leave the old one with them and for a small additional fee they will sharpen 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 17, 2010 | Makita 5012B 12'' Electric Chain Saw

1 Answer

How do you put a chain back onto a chainsaw

on one side of the saw are two nuts and a chain tightener screw. loosen the nuts but don't take them off. turn the tightening screw counter clockwise. the bar should slide backwards. the chain goes over the clutch disk and the tangs go into the bar groove. just keep pressing the tangs into the bar all the way to the tip and around the tip sprocket. now turn the adjustment screw clockwise which will tighten the chain. don't tighten it too much! leave a little "play" - tighten down the nuts. plug in the saw and start it. if the saw has a chain oiler press the oiler a few times. as you use the saw the chain will expand and loosen. loosen the nuts and tighten it again just a little.

Oct 25, 2009 | Electric Garden

1 Answer

Chainsaw chain will not tighten on the guide bar

The two nuts on the bolts for the chain bar, need to be loosened.

Then the tension screw is tightened by turning it Clockwise. (To the Right)

If the chain doesn't tighten,

1.Insure that the nuts are loose enough, so that the chain bar may slide.

2.Insure that the tension adjusting screw does not have stripped threads, nor the threaded part of the case it screws through.

Oct 17, 2009 | McCulloch 16 In 4.5 Hp Electric Chainsaw...

1 Answer

Chain keeps coming off the bar, think it may be a worn out sprocket? Has a special 1/4" sprocket for carving, with a carving bar

There may be other sources also but this one explains how to remove it from your saw.
It says they have 1/4" sprockets for yours and Stihl electrics. GL
If you are properly tensioning it a worn out sprocket can cause this.

Oct 13, 2009 | Makita 5012B Electric Chain Saws

2 Answers

Tightening chain

with the electric makita you should make sure the bar is sitting on that oval slide piece on the saw. they should fit together so that the bar will sit flush against the clutch plate and saw. attach the cover with the nut and tighten just enough to hold the cover on. then turn the screw on the nose of the saw, next to the bar, and then tighten the nut the rest of the way. if there's slipping or the chain wont tighten you should inspect the bar to make sure it is sitting flush against the saw.

Nov 08, 2008 | Makita 5012B 12'' Electric Chain Saw

Not finding what you are looking for?
Makita 5012B 12'' Electric Chain Saw Logo

Related Topics:

222 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

2463 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