The blade is turning backwards - Sears Craftsman 7-1/4 in. Circular Saw with LaserTrac and 5 Bonus Blades

Are your blades installed up side down?
Is the blade drive belt installed properly or are the blades turning backwards? Is the belt too loose and slipping?
Are the blades dull and need sharpening?.

Check this video on YouTube to understand all about the three flight modes and the SAFE technology. Blade Nano QX Basic Overview and set up

if its spining backwards the blade is up side down motors dont run backwards they run clock wise your blade should run clockwise to its possible they put your blade on backwards you will hgave to flip it put it back on

Wiring is backwards

if the spindle is turning in the right direction I would think that the blade is on backwards. the teeth should point towards the front of the tool. UNPLUG tool before maknig any adjustments. If the spindle is rotating backwards then it is an electrical issue.

I had the same problem with the Bosch 4000.
Changed the field for a new one...end of problem

Check your linkage connected to your transmission gear shift lever.

With the saw unplugged, retract the guard with the base plate extended so there is minimum teeth showing below. Place the blade of your saw on your wood top workbench. Press it down. Using the wrench that came with the saw or other appropriate size box or open end wrench or socket, turn the nut backward (this is a left hand thread not standard right hand thread). It will be tight.

Alternatively, there may be a shaft lock that you can press to lock the shaft to facilitate unbolting the blade.

Alternatively, there mau be a small hole in the blade. Insert a phillips screw driver in the hole to facilitate blade removal.

Key is knowing the thread is backward to what you expect. The reason for this is to cayse the nut to tighten as you turn on the saw, not loosen.

When you put on the new blade, make sure the nut is properly secured.

I hope this is clear for you.

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SOUNDS LIKE YOU HAVE A SPRING OFF ON DEK

First see if the switch has a reverse position. Sometimes you turn the fan assembly in the frame, sometimes you turn the whole frame around. Take the cover off the wiring compartment to see if there are instructions there. Also check on the name plate on the motor, there may be instructions there. Attic fans are usually engineered to blow out.