Originally Posted by r3tmac
Yes my WOT is 5500 rpm, but I prefer not to run it that high, it is best to back down the throttle a little bit? It can not be good for an engine to run at WOT for long periods of time?
To check if you have proper propeller for your boat it is good to make one test:
1. After you warm up engine
2. After 10 minutes of normal cruise speed at 4000 RPM
3. Full throttle half a minute and check RPM. If you reach 5500 or a little higher (if you be alone) - you have right propeller.
If not (below), you can consider to use prop with lower pitch (1 inch is usually 300 RPM more). Perfect fit prop is like perfect ATM for a car ...
Mine WOT with full load is 5500 RPM (300 kg of people), with me alone 5800.
I'm trying to have 4000 RPM but EVINRUDE pushes me to have 4500 even 5000 on calm water.
On long cruise will try to follow l / 100 km consumption and will try to operate between 3800 - 4500 RPM (50km/h - 60 km/h on the lake, less on the Sea I think)