Hi how do i tighten chain on mcculloch m4218 chainsaw

SOURCE: mcculloch 110 - loose chain

Look at the saw body from the nose of the bar, Just to the left of the bar a slotted screw head should be visible (on clutch cover). That is your tension adjustment.

Chain adjustment

1. Make sure the chain brake is off (gloves will protest your fingers).
2. If necessary, loosen the nut that is clamping the guide bar in place (or whatever your saw uses to hold the side plate and bar on with). We don't need these really loose - just finger tight will do.
3. Ease the tension until the chain is obviously loose.
4. Using one hand, hold the nose of the bar up.
5. Now, while holding the nose up, adjust the tension so that the chain just touches the underside of the bar then just a little more.
6. Continue holding the nose of the bar up & tighten up the clutch cover nut.

SOURCE: hi, my mcculloch chain saw is not cutting

Use a file around the perimeter of the bar at about a 45° angle, both sides. Remove just enough metal to see where the file has been. I think you have a wire edge that is causing the bar to cut at an angle. Be careful it is sharp. If that is not it post back below. Good Luck. HTH
Lou

SOURCE: how to tighten the tension on M4218 Maccoulic

A link to your OM follows, the procedure is on page 8 and appears quite good.
http://weborder.husqvarna.com/order_static/doc/MOEN/MOEN2009/MOEN2009_545154793.pdf

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

SOURCE: I need to tighten the chain. Is there a way to do

there should be a screw at the back end of the bar.Screw it in to push the bar out ,or forward, thus makeing the chain tighter

SOURCE: mcculloch electramac ems300s chain is loose how to tighten

A link to an OM for a similar model follows:
http://weborder.husqvarna.com/order_static/doc/MOUS/MOUS2008/MOUS2008-MCC1514-6096210915-966993001.pdf
Tension adjustment is on page 10. All chains are adjusted similarly, this one is reasonably complete, the only addition I suggest is to elevate the nose of the bar when adjusting and tightening. Experience tells me adjustments require many fewer tweaks when the nose is elevated.

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.