Some new and some old parts combined to make a high end commercial pressure washer for half the price.

Honda 13hp with 4gpm 4000psi 66DX Cat Pump.
CAT pump: http://amzn.to/2gRc4CA
50' Hose: http://amzn.to/2FJ2GMh
Wand 4000psi : http://amzn.to/2pd7of0
Quick Connect Adapters: http://amzn.to/2FEViW3
WINTERIZER: http://amzn.to/2gQoAlI


Ideally a belt drive will give longer life. Belt drive units are the ultimate professional pressure washers and they will get the benefit from being able to gravity feed out of a water tank, lower pump temps after hours and hours of straight running and ideally more longevity. Personally I will never run this for hours on end nor do I need to gravity feed out of a tank. If you plan on running it for a business, 25+ hours a week, for years, go belt drive. But personally I didn't want to source pulleys, belts, make guards or spend the extra for a belt drive pump. The cat pump I used has an average lifespan of over 3000hours, so I could use it for 3 hours a week for the next 20years before I need to do a major service.

CAT spec sheets show the only longevity difference is bearing life due to rpm differences in direct(3600rpm 6k-10k hours) vs belt(below 1200rpm/1/3 engine speed 12k-18k hours).

Direct Drive Pump
Pros: Compact design, lower cost, more efficient
Cons: More vibration and heat from motor transferred to pump, higher rpm

Belt Driven Pump
Pros: Longer life from lower RPM, belt absorbs vibration, won’t overheat.
Cons: More maintenance, higher cost, less efficient.