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Sounds like it could be seized. Have you been running it on the correct fuel and oil mix? Clutches are centrifugal, so only work when the saw is running, so it wouldn't effect the starting. You would have to have the chain brake on and for the clutch springs to have gone in order for that to effect the saw starting.
This is why we call them "Pull-ons" ;^ )! All fuel engines require the simple, fuel, air, spark combination to run properly. The typical cause is fuel starvation. Check the fuel filter in the tank. If it's full of "crap", replace it. When the saw is running it's sucking fuel and crap onto the surface of the filter which is why it usually runs and then stops.
It was proved by sage engineers that lubrication is very much important for each and every single component of a mechanical machine. In order to keep the machines running for long time use trabon lubrication. More Info at : Home FDJohnson
It's the soft start feature of the saw that keeps your breakers from tripping or lights from dimming when the saw starts. Saw works perfectly fine without it.
Assuming the carb isn't contaminated with debris I would check / reset the carb settings.
Lightly seat the low and high speed screws and back them out 1 1/4 turns. Try so start saw...if it starts and will idle then let the saw warm up. If it won't start then Back the low speed screw out 1/4 turn...try again.
Once the saw is warm then set the idle screw so the chain just stops rotating. Adjust the low speed screw inwards and listen for the rpm to increase as you do...keep going until it starts to drop in rpm....back the screw out until rpms have peaked and back the screw a bit more past that...less than 1/4 turn. Try to work the throttle and tweak the low speed screw until the saw revs crisply...readjust idle speed.
Apply full throttle and turn the high speed screw in until you hear the saw "sing"....it will get very smooth and the rpms will increase. DO NOT leave the screw at this setting as it is running very lean and will burn up in short order. Back the screw out until you hear the saw tone "roughen"...the revs will drop a bit and the smoothness in the exhaust tone will disappear. Back the screw out a bit more past the point where the saw tone start to roughen....this will make sure there is sufficient fuel when the saw starts to actually cut.
If none of this works for your saw I would suspect the carb needs to be cleaned / kitted. Also doublecheck that there are no air leaks between the carb and cylinder. Air leaks could be caused by bad gaskets and or loose mounting fasteners.
SOUNDS LIKE THE CENTRIFUGAL SWITCH IS NOT WORKING.
THE MOTOR IS STARTING ON THE START WINDING AND NOT SWITCHING TO THE RUN WINDING. THAT IS THE REASON IT IS RUNNING SLOW.
Check the fuel filter, air filter and muffler for plugging. Make sure the carburetor fasteners are tight. Does the primer bulb fill with fuel after several pumps? Hope this helps!
i own 4 saws corrently--- and i have had numerous saws over the years. i even had a business for 9years manufactureing lawn mowers and selling and servicing small motor s and chainsaws etc.------ and i would never use or allow to be used a fuel .oil ratiogreater than 25 to 1----- for what it is worth! but conditions here in aust may be different to usa
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