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I have a ryobi 4040 chainsaw and a problem with the chain brake. The brake is always applied when it should be in the off position and was wondering if there is any way of adjusting it. At present the problem is overcome by elastic bands creating pressure on the spring block. Thanking you Charlie Krajewski

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6ya6ya
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Posted on Jan 02, 2017

  • 1383 Answers

SOURCE: Ryobi PCN 4040 will not start up

When I was going to college I worked at a tool rental center and learned may tricks about tools. At this rental center chainsaws were seasonal thus sat in the warehouse probably as in your situation. Well one is supposed to store a chainsaw without any fuel and discard any old fuel mix because it will not keep. To easily start a saw that was in storage we would install a new spark plug, add fresh fuel mix and spray carburetor cleaner directly into the carbureter to get it started. Once started fresh fuel would be drawn into the engine from the tank and keep running. If you forgot to drain the old fuel, do it now and use the trick above. For best results, always use a fresh plug. Enjoy

Posted on Dec 15, 2008

lemmingleejn
  • 173 Answers

SOURCE: Timing adjustment for Ryobi Petrol Chainsaw Model

No timing marks I'm afraid.
But if you play around with the adjustment, you'll soon get the jist of it.
Also don't forget, you can adjust the timing, by opening, or closing the gap on the plug too;)
FixedYa!
& plz don't forget to give me a nice rating ;))
Thankyou,

Posted on Aug 01, 2009

rwvanlue
  • 486 Answers

SOURCE: New Ryobi petrol c/saw wont start.

If it is brand new, sounds like you should return it for the retailer to have repaired.

Posted on Dec 06, 2009

  • 4 Answers

SOURCE: Ryobi chainsaw magneto gap

The gap needs to be as narrow as possible without any actual rubbing of the rotor against the magneto. The spacing is not as critical as with spark plugs or points (remember them?) since unlike those gaps there is no spark jumping across this gap.

Generally, as long as the magnetic field is strong enough, the magneto will produce the necessary spark at the spark plug. The closer the magnets are to the coil, the stronger the magnetic field will be across the coil, and therefore the stronger and hotter the spark.

I have replaced magnetos and they are simple to install, and almost impossible to mess up if you do it this way. All you need is a piece of thin cardboard (not corrugated). I use a glossy business card without raised lettering (so it slides easily), or the like.

1) Rotate the flywheel so that the magnets are NOT positioned in front of the magneto, then loosen both screws of the magneto so it can move freely.

2) Insert the business card between the magneto and the flywheel such that the glossy side of the business card faces the rotor.

3) Then BEND the business card back over each side of the magneto (in other words away from the flywheel) so it stays fixed and can not move from side to side when you rotate the rotor.

4) Then while pinching the magneto and ends of the business card tight between your fingers, rotate the flywheel to position the magnets directly in line with the two sides of the magneto.

Note: The magnets will grab the magneto and try to move it. As long as the slippery side of the business card is facing the rotor and you haven't removed the screws, it should move fairly easily.

Since the magnets want to pull tight to the magneto, but the business card thickness is the same across the entire surface, this gives you an even spacing between both sides of the magneto and the rotor. Essentially, the magnets on the rotor do all the work for you. with regard to alignment. As long as the magnets (flat shiny polished square surfaces on the outer rim of the rotor) align directly with the two faces of the magneto, the alignment is automatic.

5) Once you have the magneto and rotor in perfect alignment, cinch down both screws in an alternating method, first just to where they start to grab, and then back and forth a few times until they are firmly tightened.

6) Now, unfold the flaps of the business card and let it move with the rotor instead. You should be able to rotate the rotor away from the magneto and the business card should slip out easily. It may stay where it was or it may slide out from the magneto - either way will work.

7) Once past the magnets, the business card should come out. You may have to move the rotor back and forth gently a few times to get it to come free. When you are done, the magneto should be in perfect alignment with the face of the rotor and the rotor should spin freely without any rubbing.

8) Confirm the above and then reassemble and go cut some trees.

Phil



Posted on Jun 01, 2010

Testimonial: "Thank-you very much, just as I suspected - had not come up with of an alternative to the feeler gauge so that was most helpful."

  • 6468 Answers

SOURCE: chainsaw chain brake on Ryobi PCN 4040

remove the cover and check the spring

Posted on Apr 14, 2012

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