You were more efficient at the higher RPMs ( ~1.43 mpg vs ~1.48 mpg). Not by much, but more effecient non the less. Probably because at the higher speed you had the hull higher up on plane and out of the water a bit more.
Just as it is about to die, spray in some carb cleaner and see if it comes back to life. If it does, it's a sure sign that the fuel lift pump is the culprit.
I agree with Ron. If you are barely making rated WOT RPM with a VERY light boat, then, as you add fuel, water, stuff AND as the season goes on and your bottom dirties up a bit, you are sure to be well below rated WOT RPM and will be overloading the engines.
Maybe someone with a single engine boat would be willing to swap with you. Someone may take the silver cover from you and give you back their black cover in return. Then you would have two black covers. Or, vice versa and then you would have two silver covers. Hey, it's worth a try.
A properly wired Tower at the dock should only ever have a convenience outlet that is GFCI protected. The Tower should NEVER have GFCI protection on the circuit that the vessel plugs into. Nothing is being missed.
The circuit that the GFCI receptacle is protected by is a 125v 15a circuit breaker. If you were to disconnect the wires from the back of the GFCI receptacle and short them to each other it would be that breaker in the salon panel that should trip. Not the breaker in the tower.
Think of your...
I would think that even if the GFCI presented as a dead short that the circuit breaker at the panel inside the boat would trip before either the circuit breaker in the transom tripped or the circuit breaker in the pedestal tripped and certainly before the entire dock lost power.
Humph/Doozie:
I agree with what you guys are saying about how the GFCI normally works. However, this discussion was talking more about a GFCI receptacle that is possibly malfunctioning.
Ths is where I disagree. I still don't see how a GFCI, good or bad, could trip the pier. There are two...
The GFCI should only trip the breaker in the boats panel. It is of less rated amperage than the 30 or 50 amp breaker at the tower. It should not trip the towers breaker and definitely not bring down the entire dock.
I doubt that you are tripping the whole dock with a bad GFCI receptacle. Most likely, it is just the oposite. Something on the Dock is causing your tower and/or GFCI to trip. Even if you had a direct short in your shore cable, you should never trip more than your own tower's breaker. Talk...
I see this here often. Why would you suggest diagnosing an issue via PM?
One of, if not "the", largest benefit of this forum is to share issues so that everyone can learn from other's experiences. No?
Have you considered that it may be fuel? Are your racors squeaking clean dry? Try running a sheet of tissue paper over the filter housings and any fuel line fittings in that area.