Unfortunately you could not purchase this machine with another brand of pump, meaning the machine could not be customized from the factory. However, you could definitely purchase a General Pump, CAT PUMP, or AR brand pump and install it on this machine with no modifications needed. You would just have to make sure that the replacement pump you purchased accepted a 1" diameter shaft and was designed for a horizontal installation.

When it comes to a unit with a General or Cat pump, the difference in quality is going to be much different. It really comes down to the type of pump. The General and Cat pumps are going to be a tri-plex plunger pump made of ceramic. Going to be much more durable as well as a better quality. Axial Cam pumps are made from aluminum and not going to give you the durability you are looking for the long term.

Replacement pumps are typically going to be anywhere from $250-$500. The plus side to a tri-plex pump, you can actually rebuild these, where an axial cam cannot be rebuilt.

Thanks,

Pressure Washers Direct

Karcher actually makes really good quality pressure washers, especially their gas models. Karcher uses their own branded German engineered pumps on all of their gas pressure washers. With this model having a Honda GX engine on it, you are absolutely getting a quality pressure washer. You might have heard some negative comments on Karcher products due to an issue Karcher was having a couple years ago with their after sales support. Since then, Karcher has drastically improved their warranty procedures.

I would have no problem at all recommending Karcher's gas models or their higher end electric models. We have had good luck with selling their products.