My ryobi c4620 chainsaw will start fine, but when I apply full throttle it seems to get bogged down a little and doesnt have full power. Then, as soon as I touch it to any wood it loses all power immediately, chokes, and wont cut a thing. This is even when full throttle is being applied. Help?
Adjust the choke or carburetor. In case your chainsaw stalls when the engine is idling, ensure that the choke is set properly. To do so, first try releasing it to adjust it, and then move the plate and tighten all screws once again. To loosen any grit, spray carburetor cleaner spray on the choke's shaft. The carburetor may also need to be adjusted; consult your owner's manual which will guide you on resetting the idle mix screw.
SOURCE: my Ryobi petrol RCS 3540c
Check that the chain is on the right way around. The cutting edge of the teeth on the chain, at the bottom of the bar should face towards you and away from you on the top. It's most likely that the chain is facing the wrong way. If you don't know how to fit a chain look at the video on http://www.ehow.co.uk/video_4419336_replace-chainsaw-chain.htm
If that's not the problem then the chain is blunt and needs to be sharpened badly. You can sharpen it, with a special file which can be got from chainsaw dealers, or take it to a garden tool hire centre and have it sharpened professionally. It has to be sharpened professionally from time to time anyway to keep it cutting straight so if it's that blunt I'd recommend you get done professionally now.
The smoke if it's coming from the chain is caused by overheating from trying to cut with the chain which is too blunt or turned the wrong way. If the smoke is coming from the engine check your fuel. You should have petrol mixed with 2 stroke oil. The saw manual will give the ratio of 2 stroke oil to petrol. If you use too much oil or if it's not 2 stroke it will cause smoke from the engine. Also if you use cheap oil it can cause smoke. It's best to use good quality oil like husqvarna or stihl 2 stroke. These also protect the saw better than the cheap brands you get at car service stations which are really only meant for boats which are water cooled.
Testimonial: "Thankyou, I'll check that. It's only about a year old and hardly used so possibly not blunt but chain problems."
SOURCE: Ryobi PCN 3335 chainsaw cuts out? It will run on
It is hard to diagnose a saw without seeing and running it but these are more than likely could be the problem/s with you saw.
You could have an problem with the electrical or fuel systems. For problems with the fuel system check the following:
-If the tank has a breather make sure it is not plugged.
-Check fuel filter to make sure it isn't plugged.
-Check it the fuel line is not collapsed or pinched preventing fuel from getting through. the 10% alcohol in gas can deteriorate fuel lines and carburetors causing them not to work(pump fuel).
-There is a suction line that comes from the motor to the carburetor which creates suction to pump fuel in the carburetor. Check if it is disconnected, has a leak, or is weak and squishy preventing any suction and fuel from being pumped. Replace if any of these are the problem.
-If none of the above it may need a carburetor rebuild from old age, bad gas etc....A professional can rebuild in half an hour to an hour and adjust it for you. Unless your super mechanically inclined that is when you need a pro. Even most loggers, including myself, let the saw shop do it because they are so fast and good at it. If you live in a area where there a tree service pros or loggers go the shop where they go if you go that route. They will be the most reasonable and fastest at repairing.
If it is an electrical problem:
I will start at the obvious and work from there.
-Check the the on/off switch to make sure it is in on or run position. Sometimes it looks on but gets hit when starting or was not pushed hard enough to be in the on position and will switch off and on.
-See if the wiring going to the on/off switch is cut or bare and is shorting out the switch.
-Check to see if spark plug is good and clean. Dry it out if it is wet and clean it with sandpaper or steel wool to make sure the gap is is clean so there is nothing to prevent a good spark.
-Check the spark plug wire to make sure it is not cut or chaffed and is grounding, preventing the electrical charge from getting to the plug and make sure the wire is connected to the spark plug boot that holds the wire to the spark plug. Sometime the piece that holds onto the spark plug detaches from the wire.
-Make sure the small piece that holds the spark plug to the spark plug boot is not loose or even missing. Leaving a gap between plug and boot.
I don't know how handy you are. Most shops have the electrical tools to check for shorts and dead coils quickly, so it is a quick fix if you do have to bring it to a shop. Hopes this helps.
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