Question about Ryobi 18-inch Electric Chainsaw Chain Saws

4 Answers

Ryobi pcn 4040 chain saw

My saw starts ok but when I try to cut with it the chain stops, I think the engine seems to be struggling to keep the chain turning, the rotating section were the drive is gets very very hot and it smokes quite badly, this machine is not very old and has not had a lot of use, I have made sure there is sufficient chain oil and also that the safety guard is in the correct position, any ideas?

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  • mhallworth Sep 29, 2008

    Yes same problem and now it won't start, I have checked the spark plug all is well and it's sparking etc?

  • gazviv Feb 02, 2009

    I have a 4545 with the same problem. The chain brake does not release properly unless I physically pull the brake bar towards the handle. As per the other solution, I've got the brake bar wired to the handle to hold it off. Totally defeats the safety aspect, but at least the saw cuts logs. As for the automatic oiling ...........

  • sqlboy May 11, 2010

    I had the same problem with PCN4040. I cut the band brake off, this means that the brake no longer works, so when the saw starts it's 'live'. So a bit of extra care and common sense is required when starting the machine.
    Remove the cover.
    Cut the spring brake (carefully - not much room).
    Remove band brake.
    Replace cover.


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I have the same model chainsaw with the same fault. The brake is not releasing when the brake handle is pulled right back. I can only run mine if the brake handle is pulled back to the main handle with a tyrap - defeats the object of the auto-brake completely. Design fault I reckon.

Posted on Oct 20, 2008

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Try loosening the chain.

Posted on Sep 29, 2008

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User manual is available for download at

Posted on Jun 14, 2009

Make sure fuel is 50to1
drain tank and add 10cc of oil to 500cc of petrol and refil.Pump 6 times,choke out, pull cord twice push choke in and pull again

Posted on Oct 22, 2008

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1 Answer

Ryobi pcn 4040 chainsaw won't start What is the

1st add fuel/oil mix to fuel tank , then top off oil tank with bar oil , place saw down on flat surface , press 'ON" button above trigger handle to ON (its marked on case) then pull out blue choke handle till it clicks and stays out , press primer bulb with thumb 8 to 10 times bulb will become harder to press as it fills carb , push chain brake forward (on) ` place left hand on top of saw and right hand on start cord , hold saw down firmly and pull cord vigorsly several times till it sort of starts (sound) , squeeze trigger in and pull cord once more , saw should take off running , chain wont move ,walk to wood pile then disengage the chain brake and cut wood , if saw fails to start after this procedure then there must be a fault in saw , consult a exp small engine dealer for repairs

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Chainsaw chain brake on Ryobi PCN 4040

remove the cover and check the spring

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Repair manual for ryobi pcn4040 chainsaw

Got the same problem. narrowed it down to the tension spring in the brake handle you can buy then for around £4 of the internet. as yet i haven't figured out how to replace it yet.

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Ryoby pcn 4040 tuning

I believe on low its 1 turn from closed and high is 1 and half turn from closed if not try the opposite way if you cant tell the difference clean carb and try again

Apr 01, 2012 | Ryobi Factory Reconditioned 18" 40cc...

1 Answer

My Ryobi pcn 4040 chain saw does not start, there is spark at the plug but I am not sure how strong the spark should be. The fuel line was removed from the tank, not sure if I have mixed them up. Which...

Not too familier with this macne , however it is very important to get the hoses around the correct way, remember that the primer pulls fuel from the carb and dumps it back to the fuel tank, if you have it the other way round it will just flood all the time and will not start, as long as there is a spark at the plug that is good enought as they work off speed of rotation and will get bigger when it starts.

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Carnt keep ryobi pcn 4545 running when i increse the power

How do you increase the power to an electric saw? By your question, I'm assuming a fueled engine model. Check the fuel filter, air filter, and muffler for any plugging. Check condition of fuel lines and tightness of carburetor fasteners. If no help, turn the H jet needle CCW about 1/4 turn--which should result in the engine 4-stroking. Will the engine now run at speed (but not as fast as before)? If ok, warm the engine up, open the throttle and adjust H CW until the engine speeds up somewhat, but still 4-stroking. Proper adjustment is when the engine 4-strokes, but immediately 2-strokes when cutting. This produces best power and least heat! Hope this helps!

Apr 26, 2010 | Ryobi 18-inch Electric Chainsaw Chain Saws

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I have a ryobi chain saw PCN 4545 - won't fire. Is there soemthing simple I'm not doing. Has worked efficiently for 2 years. Don't think it's flooded. Does it have a spark plug ? Would appreciate soem...


Oct 03, 2009 | Ryobi 18-inch Electric Chainsaw Chain Saws

1 Answer

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

Dec 15, 2008 | Ryobi Factory Reconditioned 18" 40cc...

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