The chain has come off. I put it back but it is too loose. How do I tighten it

loosen front tyre, ease chain on. re-tighten when taught tension. easy, might consider lube and cleaning chain while your there.

you need to loosen the nut on the side of the chainsaw and then take the cover off. Remove the bar and take the chain off. Then put the chain back on the bar being careful about the direction of the chain. Place the chain back over the sprocket and lower the bar back onto the plate making sure the hole lines up with the adjusting mechanism on the cover. After you line up them up put the nuts back on and loosely tighten them. Adjust the chain where it is almost tight and then tighten up the nuts.

Remove cover on the chain side of the saw. Loosen the two hex nuts that hold the bar onto the saw. You will need to loosen the tightener screw also. Place chain back onto the bar making sure the chain is positioned properly in the sprocket at the rear of the bar and just reverse the directions. Tighten the tightener screw until the chain is tightened leaving a little slack, then tighten the two hex nut. Replace the side cover. When you pull the chain down away from the bar, it should have just a bit of slack not tight. This allows the chain to turn without a lot of friction. I hope this helps.

LOOSEN THE 2 BOLTS HOLD WHEEL ON PULL BACK ON WHEEL WHILE TIGTHEN BOLTS BACK UP. CHAIN DONT HAVE TO BE SUPER TIGTH . ABOUT 3/4 OF SLACK IN CHAIN.

well first off check make sure the the chain gears of inline if nt then u need to line them back inline then put chain back on check the slack in the chain if its too loose u will need tighten it up but if u cant tighten the chain up due to chain streched out then u may need to take a few links out of the chain

Don't tighten the chain. It sounds like you have either a broken door spring or the drive gear in the motor unit is going bad. Release the opener from the door and operate it by hand. It should be easy enough to raise that your wife can do it with no problems and it should stay put when released about waist to shoulder high.

ok i assume it is an electric chain saw? chain usually gets loose and can jump off clutch sprocket . to remedy this there should be atleast one nut or bolt sometimes two nuts or bolts depending on brand and model on the side cover where bar and chain inter the clutch area remove those and cover will lift off second there is a screw that faces front next to bar should be a regular slotted screw head loosenit all the way up till bar gets loose and remove bar by pulling away from saw this will come off veryeasy and chain shoouls fit on teeth of clutch sprocket and fit back onto bar tighten screw till chain tightens up on bar then replace cover and nuts on side cover but do not tighten the with one hand put tension on chain by pulling down on it while tightening screw till chain feels elastic snapping back to bar then toghten up nuts . chain should have no more then 1/4 inch slack around bar this is the correct tension youshould maintain.

Chain adjustment

1. Make sure the chain brake is off (gloves will protest your fingers).
2. If necessary, loosen the bar nuts that are clamping the clutch cover in place (or whatever holds the clutch cover and bar on). They don't need these really loose - finger tight will do.
3. Ease the tension adjustment until the chain is obviously loose.
4. Using one hand, hold the nose of the bar up.
5. While holding the nose up, adjust the tensioner so that the center of the chain just touches the underside of the bar, add a touch more.
6. Continue holding the nose of the bar up & tighten up the bar nuts / bolts / quick-release system. HTH

Lou

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.