If it helps, its a 6.75 hp, 2.0 gpm, 2450 psi and the model number is 580.752310

The hose inlet hook up on the pressure washer should have a last chance strainer inside the female connection. A washer machine push in doodad that sometimes falls out and creates a big leak at the hose connection. Look and see if its clogged. If it's not clogged you may have to disassemble the pressure pump and see if anything blocking off the water flow inside the pump itself.

Also, if garden feeder hose was empty it will take awhile to get all the air through the small passages of the powerwasher. If there is air in the system won't have water full water pressure till all the air gets worked through the pump and out of the unit and pressure control hose and nozzle head.

I turn the water hose on to fill the hose up connect it to the power washer let the water feed through the power washer and spary nozzle line and head. Now they system is primmed and usually will have pressure right off.

Unfortunately, there was no screen on the input of the unit.

Can you tell me where exactly the "pressure pump" is? Is that the part where the oil is stored? Thats the only part I havent taken apart. If thats the case, what kind of oil and how much do I need to replace it with?

Thanks again.

Mine is a 6.75 engine but is a 2200 psi system. The engine sits on a platform, the water/pressure pump is below the platform. The engine probably uses SAE 30 (total 1.5 qt.) and is filled to the FULL point on the dipstick (do not overfill). Must ask this as it was not stated: Did you run the pressure washer without nozzles attached -- since these could be clogged, restricting the flow. Try backflushing each of the nozzles, gun, wand and connecting hose just using a garden hose with its nozzle. If the low pressure nozzle is clogged, there is a procedure to follow to de-clog it. If you must drain the oil, on mine, removing oil from the engine is done by tipping the pressure washer so that the oil flows out the top of the oil tube that is used to replenish the oil. If you were using chemicals be aware that there is a filter on the chemical hose that could be clogged.

http://www3.sears.com/
Here is the webpage to enter the model 580752310 then select Pump to see a diagram of the pump.

Yes, I tried running the unit without the hose and nozzle attached. The pressure still seemed too low. I even went to Sears and bought a new hose, gun, and nozzle but when I hooked up the hose alone, there was no change.

Theres also this that I dont understand. How would the unit get dirt inside where the oil is? I mean, if there was dirt in the hose that got put into the machine, how would it get to where the oil is? Obviously, water doesnt go into that part or the oil would come out with it.

Thanks again for all the responses.

"....dirt inside where the oil is?" in your last posting. I think that there is probably no dirt in the oil from the accident you described. In your original posting the dirt came out when you disconnected the garden hose indicates that there is dirt and debris in the pump unit on the bottom of the pressure washer. Unless badly worn, there is usually a clear separation of oil lubricated parts from the water by seals, gaskets, and O rings. If I were in your situation and wanted to start exploring the possibilies, I would start at the very bottom and work up and would be prepared to spend some money for any gaskets and rings that may have to be replaced after I explored. I believe that the very bottom of the pump portion that has 4 brass "plugs" or large screws (mine has 3) is where I would start. It appears to be held in place from the bottom with bolts and I think is called the "Head Brass." It would probably be necessary to remove the oil from the engine and flip the unit over on its side or top.

I would replace the pump with a new one, anytime the 'repaired" pump gives trouble, FIL is going to blame your repair. Not worth it...

i have a 7.0 horsepower 2900psi 2.3gpm model 580.752410 washer it is leaking water out of the bottom when in use what could cause this and what part do i need to fix

I have a Craftsman Model 580.752050. When I hook up the high pressure hose connector to the pump, it still continues to turn. But at same time if I pull on hose seems to be hooked up. Is the black thing supposed to continue to turn?