Motors are either horizontal or vertical shaft and these shafts come in different diameters and styles (keyed, threaded, gear reduction, etc.). The shaft is what drives the accessory be it mower blade, cement mixer, or pressure washer pump. Most triplex plunger pumps (the kind you want) in my experience are keyed and come in 3/4" or 1", the former being more common in low flow and appropriate for auto use.
The Honda GX is commercial grade, meant for daily sustained use and that`s why I suggested it and use a GX200 myself. Look at some pre built commercial pressure washers, many of them use a GX engine and CAT pump and when purchased new are in the $800-$1200 range. These same engines are even used in on track kart racing.
I`ve used this seller on ebay before, free shipping:
mysmallengines, Home Garden items. Great deals on eBay!
The CAT pumps include an adapter (
Cat Pump-3DX25GSI 2500 PSI NEW- Free Shipping - eBay (item 300422582062 end time May-29-10 05:29:08 PDT) ), the plate attaches to the motor`s standard mounting points, and then the pump goes on the plate.
Hope it helps. I`ve got to get the van ready for work this morning so I probably wont be able to reply until later this afternoon.
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