STILL looking for advice for my above 12/23/09 questions, ect
Thanks so much
Sorry I didn't see your question before.
I don't deal in the homeowner units so specific model numbers I don't know but can help with some basics.
As far as adjustable pressure, that's in the unloader vavle, not the pump and while most all will be adjustable, I don't recommend adjusting the unloaders as it causes too many problems. Instead, if its a gas engine, just slow the motor down or stand back a little. You can also go with a nozzle with a larger hole and this will lower the pressure.
As far as the turbo nozzle, it depends solely on how its connected to the wand. Most are 1/4 pipe threads but not all. Some are molded into the wand extension and would require a new wand.
As far as the replacement pump, Karcher often has their motors made with a proprietary shaft which will limit replacement choices if not eliminate them.
Pump types, there are 2 basic types. Axial pumps which will be on the low end machines and are not repairable (I've had no luck) and can be identified by a round body.
Crankshaft style pumps are a better choice and can be identified with a rectangular body. The have a crank and rods like a engine.
I will only use Honda motors but beware. There are 2 grades. GX series are the industrial motors and are the best on the market. GC series are the homeowner grade and I don't care for them.
Pump brands (again no specific model numbers) and only crankshaft style.
I like AR for the direct drive pumps, second would be General. Third would be Comet and last would be Cat. Cat industrial pumps are the best made but you will never find an industrial Cat on a machine under $2000. Their lower line is good but their replacement parts make Snap on look cheap.
As far as GPM and pressure, 2500PSI at 3 gpm is good for home owners.
As far as finding a deal on CL, look for a washer with a Honda GX either 6.5, 9, 11 or 13 HP. These motors will outlast 3 or 4 pumps. If you can buy a good motor for $200 or less, you can buy an AR pump for $275 to $375 and have a very nice machine.
Your CL deal on the goodyear hose at $60 is good.
Hope this is helpful and I will check back for more questions.
Again, I apologize for not seeing you questions before. I haven't been on line as much lately.