What speed are you guys running your machines at? My set up is Honda gx390 motor with inter-pump and a gear box. I usaly turn revs down for spraying ditergent and rinsing,but some times have to turn the throttle all the way up on bad drives/paths etc. Do you think this is bad practice,would this hert the machine ? When I'm cleaning I'm cringing,in my head it sounds like some ones ragging an old fiesta around a car park. I'm probably just worrying my investment will explode in my face.