About a year ago we had a thread here on ways to support your community and get noticed at the same time. One of the ideas was to particiapte in town parades. Our town has a big Halloween parade and various businesses enter floats, decorated trucks/trailers etc. So this year we are planning to dress up the truck/enclosed trlr etc. We also want to follow the truck with 2 Z's with the operators dressed in costume. The mowers will be running for at least 2 hours maybe more. I dont want to run these things at full throttle given the noise but don't want to have them starving for air for 2 hours either. At about what throttle opening can we run without risking damage to the hydros or the engine? Thanks for your input on this rather weird question .