Loose chain how do I tighten the chain

Should be a screw next to the bar. you can tighten it and it will tighten the chain. Keep in mind that the 2 bolts holding the bar and cover in place have to be loose to do this.

There are some bolts that allow you to extend the bar that the chain runs on. Find them and extend the bar a bit to tighten the chain. Don't forget to tighten them again before you use the chain saw.

Tighten the adjusting screw with the two nuts loose but snugon the middle of the chain on the top of the bar. Tighten the chain screw until the chain is loose enough to raise the chain up about 1/2 inch then tighten the mounting nuts tight. Then see if it is ok.
Terry

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

Yes. Loosen the two nuts on the back wheel. When they are loose just pull the wheel back until the chain is tight enough and tighten nuts while holding the tire in the proper position at the proper tightness of the chain. Make sure that the tire is running true when tightened.

it sure can happen. You can also take a link out of the chain to shorten it also, best thing buy a new chain.

To tighten a loose chain you need to pull the cotter key pin from the rear axle then loosen but do not remove the nut. It just has to be loose enough to slide in the swingarm. At this point there are tension adjusters on the ends of the swing arm you tighten them to take the slack out of the chain. NOT TO TIGHT! You should have 1 inch of play in the chain this is up down play not front to back. I push the chain up the highest it can go and measure how far it falls. NOTE: TURN THE TENSION ADJUSTERS THE SAME AMOUNT THE SAME DIRECTION IF THE AXLE IS TWISTED YOU WILL THROW THE CHAIN. This can make for a bad six months!

Loosen the Back Nuts on the Side of the Rear Wheel, Then use a Wrench to Turn the Bolts extending out the Rear of the Bike in Clockwise to pull the Rear Wheel Back, Thus Tacking Slack out of the Chain. Do Not over Tighten as the CHain Tightens some itself with Flex when you put Weight on it. Retighten Axle Nut. Thats it.

You need to tighten the chain, and or remove and reinstall the chain depending on whether or not it has come off the drive wheel. The chain drive is on the right hand side of the saw, and there are either two nuts (about 1/2 inch or 13mm) holding the chain on, or there is a little half round handle you can use to tighten the chain after it is on the drive wheel properly. The saws with the two nuts on them have a small flat blade screw on the backside on the bar that you tighten the chain with. And to make things more confusing, some of the newer bars have a round hole in them, that after you loosen the two bolts, you stick a screwdriver in the hole and turn it clockwise to tighten the bar, then you re tighten the 2 nuts.
Since from your description that it wont engage to cut, you will have to remove and reinstall the chain since it is loose from the drive wheel. Clean out all the wood chips, etc in the drive wheel area before you reinstall the chain, make sure it is not on backwards and sharpen and oil it before you use it. Rick

Make sure the bar is positioned on the bar adjusting pin before you tighten cover. Adjust tension with bar adjusting screw, then tighten bar bolts.