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Relatively new (used once) 45cc petrol chainsaw starts fine but when you use the throttle to make the chain go round it does so slowly before cutting out. There is plenty of fuel and plenty of chain oil

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Make sure the chain oil is reaching the chain. Can you turn the chain by hand fairly easily? If not, then the chain tension should be adjusted--loosen the drive cover fasteners enough to allow the bar to move up and down somewhat. Turn the chain adjuster screw CCW so that the chain can be moved by hand, but the chain should not droop from the lower bar edge. Re-tighten the cover fasteners and recheck the chain tension. If ok, try to run the saw again--it should run at full speed, 4-stroking lightly, but immediately 2-stroking when cutting. Make sure the fuel mix is fresh using a modern synthetic saw oil and shaking the container thoroughly each time just before filling the tank to prevent oil starvation. Check the fuel filter, air cleaner, and muffler for plugging. Check the fuel lines for decay or other damage. Hope that some of this helps!

Posted on Jan 04, 2011

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It turns out the solution for me was that the starting instructions in the manual are not really complete, there is another step that aids in starting: it needs some throttle. The chainsaw does not like to start with power at idle. After setting the switch to on and setting the choke, as the manual says, before attempting to start, squeeze the throttle while pressing the side button to lock it. For me, this allowed it to FINALLY start with only a few pulls. I learned this when I ran across this video:
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