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Re: Ryobi 18" petrol chainsaw won't start
My guess is that you have a crack or a hole in one of your fuel lines. this is very common in chainsaws and weed eaters because they are used very little and sit for a long time. try checking this and repair if necessary. let me know if this works.
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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
Things to check,drain and re fill with fresh fuel/oil mix, replace the fuel filter in the fuel tank, remove the spark plug, rest on top of the cylinder and check for a spark, if this is all ok remove the muffler and check the condition of the piston through the exhaust port, any signs of damage and the saw will have to come apart for further investigation.
Remove the spark plug and test for spark. If nothing, try a new plug set to 0.020" gap. If ok, put a small mount of fuel mix in the plug hole and try to start. If you get several pops, then check the fuel filter, air cleaner and muffler for plugging. Check the fuel lines for rot or damage. Make sure to use fresh fuel premix (40:1) using modern synthetic saw oil in it's own can and shake thoroughly just before filling each time. If you got no spark in the first test, expose the flywheel and ignition module. Remove the wire from the module that goes to the ignition switch and check for spark. If still nothing, replace the module using a thin business card for a gap gauge between the module poles and the flywheel magnets. If you did get spark, then investigate the ignition switch and wire for possible grounding. Hope some of this helps!
Upside down is not a usual sawing position--only upright, or turned to the left or right side is recommended. If you need to undercut something, keep the saw upright and cut with top side of the chain/bar.This can lead to kick-back if the tip comes free of the log/branch, so you need to control the saw carefully. That's also why there is a chain brake on all newer saws. The leaking may be occurring where the fuel lines pass through the wall of the fuel tank. Hope this helps!
it is normal to see air bubbles in line when pumping the bulb. to make sure what the problem is, try starting several times, remove spark plug. if dry, yes no fuel, remove the carb. if wet, place plug on engine block and look for blue spark. no spark means you need new plug, plug cord or ignition module
If it is an electric chainsaw (not gas powered) then the only oil you need is chainsaw bar oil, which lubricates the chain and bar during use (self feeding system). This goes into the chamber at the top of the saw. You can buy chain/bar oil for chainsaws at any good hardware store or outdoor power equipment store. You can use any brand of chain bar oil, most are pretty good.
If it is a gas/petrol operated model, I will need to know the model number to advise on that.
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.