For 4000+ PSI pressure washing power, the Honda GX390 engine or the Vanguard model provide reliable 4200 PSI at 4.0 GPM performance. Commercial pressure washer #95002 is the base model with a 4200 PSI at 4.0 GPM Honda GX390 engine and a CAT Triplex plunger pump. Model #95003 takes the Honda GX390 Pressure Washer with 4000+ PSI and adds the extra convenience of an electric start.
For those with a limited budget, but still need a 4000 PSI commercial pressure washer trailer, the #95004 commercial pressure washer model is a practical option. It comes with a Vanguard V-Twin engine and CAT Triplex plunger pump, producing 4200 PSI at 4.0 GPM. Whereas the Honda GX390 is available for use in 49 states, the Vanguard can be used in all US States (including California).