Change blade we need to change the blade on a 8 1/4 compound miter saw

OK first raise the cutting head. Loosen the screw that holds the guard in place and move out of the way. Find the spindle lock on the right hand side of the gearcase and turn blade by hand (UNPLUG SAW FIRST) until it locks. With the wrench supplied with saw put it on the blade bolt and turn it clockwise to loosen, it has left hand threads, remove outer flange and blade. Let me know it you need any more help

If this is a B&D 9425 type 1 8.25" compound miter saw you will need to release the blade guard lock and rotate the guard up & out of the way. To do this:
1. UNPLUG THE SAW!!!
2. The saw assembly should be up.
3. Locate the access hole for the guard release screw. It should be on the right side of the blade shroud behind the motor housing. The guard release screw requires a hex key/allen wrench, but the same size you use to loosen/tighten the blade works here too.
4. Turn the guard release screw clockwise until it stops.
5. While pressing in the guard release button on the front of the saw handle, pull the blade guard toward you, it should rotate up into the blade shroud and give you open access to the blade.
Note that the screw holding the blade is reverse threaded- turn it clockwise to loosen it.
Hope this helps... happy mitering!