Thanks everybody!!!! The genny will go onto an 18hp vanguard running a TS2021, dual belts. So is it safe to assume that adding a 2500 watt generator (losing approx 5hp) will bring my pump gpm down around 4gpm???? I'm going to check into the shaft length to obtain appropriate pulley and belt. I have a fabricator who can make me a mount.....he's currently outfitting a 2002 ex-police paddy wagon for me right now which this machine will eventually go in. I'm pretty stoked to get this rig on the road!