VERY RELIABLE 4.5HP, BRIGGS & STRATTON, 2200PSI, 2.2 GPM. EASY TO START, BIG HANDLE GRIP STARTER, NO LEAKS, DOES NOT USE OIL , COMES WITH 4 EXTRA NOZZLES, EASY TO TRANSPORT EVEN IN A TRUNK, UPPER HANDLE DETACHES FOR STORAGE/TRANSPORT. AGAIN... EASY TO START, VERY RELIABLE!