Blade wont tighten on craftsman elictric chainsaw

What to do if your chainsaw won't stay running?

arborist101.com/what-to-do-if-your-chainsaw-wont-stay-running/

Idle ports may be plugged or blocked - This is the small ports in the carburetor where the fuel passes through when in idle. ... Vent in the Fuel Cap is plugged - If the vents in the fuel caps are clogged the fuel becomes vacuum locked. ... Starting with the High Speed screw, turn it ...

Craftsman 16" Chainsaw Fix - Won't Run - Fixed! - YouTube

? 1:32
https://www.youtube.com/watch?v=aIUVQziXBPY
Jul 7, 2011 - Uploaded by BriggsRepair
Is this Craftsman 16" chainsaw broken? Hardly. Watch this carburetor fix and how it runs brand new!

Chainsaw won't stay running - DoItYourself.com Community Forums

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Why won't my chainsaw stay running? ' Yahoo Answers

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1. does the spindle turn freely without the blade attached?
2. is the spindle housing tight against the deck with the mounting bolts tight. If not, check to make sure the housing isnt cracked.

Are you loosing the bar at the same time if yes then lift the bar up and then tighten the chain and then the bar there are some helpful video's on utube

You need to tighten the chain. Loosen the nuts that hold the blade on just a little, then look on the inside of the blade. You will see a screw to tighten the blade. The chain should not be tight. There should be a little space between the chain and the bar. You should not be able to see the guide teeth of the chain. Just about 1/32 of an inch. When you tighten the blade back up, if you had it too lose, it will tighten the chain back to, too tight.

sounds like you may not have the right mandrels making the belt to tight and it cant be left loose enough to allow the blades to quit turning.Otherwise you didnt put the belt back on correctly if it is around the tightener pully the wrong way that to will make the belt to tight

There should be a chain tension screw to tighten, or slacken the chain.
You should be able to loosen the chain enough to remove it.
Be sure to draw on a piece of paper the way the saw teeth are pointing first.
It wont cut if you install it backwards.

The blade is held in place by a bolt. Some models have a locking mechanism for the shaft. some do not. Either depress the spindel lock or use a piece of wood or similar to stop the blade from rotating and using the correct wrench size for the bolt head, turn the bolt counter clockwise to loosen and remove the nut. Insert the new blade and reverse the process by hoding the blade in place and tightening the bolt head clockwise

The chain brake should have been released before removing the cover. You will have to release it with a large flat-blade screwdriver in the connector that runs the brake from the control handle. Hope this helps!

It sounds to me like the blade has stretched which the do in changing temperatures.
Try replacing the blade before you give up altogether. i was having the same problem with a Ryobi Blade would come off whenever i tried to cut a pice of 3 ply. I eventually replaced the blade and all ny troubles evaporated.

If you tightened it enough and it still slips than it may be missing a spacer Try adding a washer to the arbor of the same size on the nut side of the blade.