Varying
Depends on water, etc. I have a no-wake zone to cruise out of, so a forced warm up and cool down, I vary between idle and 2500 rpm. Then it depends on water and where I'm going. Full throttle is definitely not a constant. I'll run 5k, then 5.8k, then 6.4k with bursts (30 sec or so) of full. Full on good water is addictive, though, along with the slalom and 180s. Haven't the chops to 360 yet. I agree w/Karl on varying speeds. It helps beyond break-in.