My 18v dewalt cordless circular saw wont run any more,i smelt a burning smell when cutting.could it be burnt out?

SOURCE: dead dewalt 357 dw357 circular saw

first!!!! unplug saw.remove housing screws to check for a loose connection.second. be sure your outlet has power.

SOURCE: repair spring to lower guard to spring back

You may be able to salvage the torsion spring that is there. Sometimes the end will break off and you can bend yourself a new end and just stick it back into the retaining hole in the housing or guard. There may be damage to the guard which will not allow you to just bend the spring to make a new joint. Either way, you need to know what you are dealing with. First remove the blade if you haven't done so already. Then remove the bumper (rubber piece) that stops the guard from returning too far. Next you will need a pick or a small flat head screwdriver. Look around the hub and you will notice a retaining ring. You will have to use the pick or screwdriver to get the ring started. Look for a little tab around the perimeter of the hub. You will have to work that tab out and make sure you keep your pick or screwdriver under it. Then work it around and off the hub. Then you can remove the guard from the hub. The spring is located under the guard and is a torsion spring. Look for damage to the guard and the housing as well as the spring. If there is any question to the integrity of the guard you should replace it. The part number for the torsion spring is 612517-00 ($1.50), the retaining ring is 150383-00 ($1.50) just in case you break it, and the guard number is 611925-00 ($6). If you have any questions please post back.

SOURCE: How do you put the DeWalt DW367 circular saw back

Just figured it out ourselves: with case open and facing you, place the saw in, blade facing you. It needs to go down at an angle so the "leveler" is resting on the tlted portion of the case. Make sure the cord isn't hanging out.......took us about 1/2 hour to do it. Ours was a dewalt 368; next time we'll take a pic before taking tools out of their cases! hope this helps.

SOURCE: My very rarely used Dewalt

It could be several things. First, make sure you are plugging it directly into the wall, no extension cords. Try at least 2 wall sockets. Pull the brushes and ensure they and their shunts as well as the brush springs are intact and are not damaged. Also make sure they travel easily through the brush holders and verify they touch the armature bars. I dont know if you a multimeter or continuity tester, but you will need one for the next steps. You will need to test the cord and switch for continuity. If that checks out, examine all the wiring within the trigger handle for burns. Past this, you will have to test the field and armature. If you are up for that, you should have continuity between every communtator bar on the armature, and no continuity between any bar and the core of the armature(see picture)(the part with the box and X is the core. None of these silver bars should have continuity with any of the copper bars. Let me know what you find, I am more than willing to help out.