I have a Shop-Vac with a 6.5 HP electric motor. The vacuum power is lacking and I think it is the electric motor brushes. Looking for the brushes. The ones I took out have the number 848 stamped on the side.

That is normal electric spark from a brushed AC motor.

Are you sure the main vacuum motor is running ? There are 2 motors. A vacuum motor and a brushroll motor. If the brush is turning but the vac motor isn't running it would not pick up anything. Could be a bad switch or a bad vac motor. Take it to your local vac shop for assessment.

Try your local hardware or look under vac repair or electrical motor repair in your local yellow pages, my local hardware has a bunch of differnt motor rush sets .

That problem have 2 causes..#1 is loose electrical connection inside or on the power cord..#2 is worn out carbon brush inside of vacuum motor..

Carbon brush is the one of the most serviceable parts of a vacuum cleaner because our vacuum cleaner motor is very hard working parts so the brush inside will possible worn or not connected to the armature of rotor...

Hi, replacements can be found at amazon, click here and take a look: WORKSHOP Vacs Suck It Up Get It Done. I hope this was helpful. Cheers

Most vacuum motor brushes are not serviceable by the consumer. without further information, I would take it to a vac shop for service. If you are mechanicaly inclined, take the motor out and then take the motor to a vac shop for service.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_b96ba3f038cf317c

Detach the vac itself from low voltage thin wiring leading to the house. With the vac plugged into power, try the manual switch and then try shorting across the low voltage exterior terminals with a rubber gripped set of pliers.
If you can hear a clicking inside, this is the vac's relay trying to start the motor. If the vac is more than 5 years old , or used more than 2 hours a week, you may need new carbon brushes, or a motor overhaul or replacement depending on wear. Carbon brushes are specific to the motor model # inside the vac, most often an AMTEK Lamb motor.
If you need brushes, the motors comutator should also be inspected for excess,wear, like gap ing between its conatct segments and "apple core" shaped wear
.
You you have a meter and can test for continuity across the motor leads, do so and post back.

If you don't have a meter, you will likely want to lift the vac off the wall after these checks and take to a repair shop, saving $$$$ for a house call...

Try looking for a power tool repair shop, they usually have some brushes and can order more. I have put Hoover brushes in my Shop-Vac.
Look for some that are close to matching,( spring size,spring length, brush length). If the brushes are a little large they can be made smaller by dragging on a flat file. Carefully fit them so they slide into the brushholder nicely.
I have even soldered different ends onto the pigtails, whatever works----I am a pragmatist!
You could also look for an electric motor repair shop in your area- they have suppliers.

where can i fine moter brushes for my ridgid 5.25 hp 16 gal. wet dry vac.

If you remove the motor, you will see that the wires that go from the switch to the brushes. On one side there is one wire connected directly to the brush. On the other side the wire goes to a plastic plug with a second wire going to the brush. This is probably where the problem is. This is a fusible link and it has most likely melted creating an open in the circuit. I put a piece of solder where the link was and the motor ran BUT the brushed arced like a sparkler. Upon further examination the brushes were crumbling apart. I have been unable to find replacement brushes.
This machine has a five year warranty. I called Shop Vac Customer Service 1-888-822-4644 and they sent me a new motor.
I had a Shop Vac QL50EIC which had exactly the same problem but the warranty was expired so that I had to buy another motor for about $50.