[trit21]

Boats should be propped so that under full load (boat full loaded, fuel fuel, water etc) the engine should turn up to rated RPM. So, find your rated RPM for the engines and compare that to the 3800 MAX she turns now. I think gassers normally turn at 4800 MAX so if that is the case, then you are WAY over propped. An over propped boat puts a lot of strain on the engines overloading them at all RPM levels. If I was you:

1) Find max rpm for you engines.
2) Adjust props to achieve at least the rated RPM. You will find the boat and engines are much happier and you may even get better range, etc.