RPM vs up on plane

[LilRedNeckGirl]

I am reading a bunch of posts here, related to engine rpm and getting up on a smooth plane. I run twin 3.0 140 hp mercruisers, on a 24.8 wellcraft. Im getting up on plane around 2500 rpm and consider a easy cruise at 3000 rpm. She will run up over 4200, but im not feelin the need for speed.
I have, but never use , bennit trim tabs. they just never seemed needed.
These numbers relate to a 25 foot long, 8 foot wide, deep V hull boat, loaded for fishing, 100 gallons of gasoline in the tank, typically 6 or 8 bags of ice in the floor cooler, and two people on board.
are these numbers typical?

 

[Bondo]

Re: RPM vs up on plane

Ayuh,... Generally speakin', about Every I/O boat I've ever been in cruises, Comfortably, at 3200/ 3500 rpms...

Of course, it takes abit more power to break up onto plane, but cruisin' is cruisin'...

 

[Brentathon]

Re: RPM vs up on plane

As long as your WOT rpm is in the proper range for the engine(s), you should be OK.
That's really the best test for power/speed/rpm questions.

 

[jerryjerry05]

Re: RPM vs up on plane

The trim tabs are for triming the boat when your load shifts seats.5 fat girls on one side of the boat and it brings it up even.
They are also used for bigger boats getting on plane.My 32 would wallow unless I had the tabs all the way down. They are also good for some boats that wander a lot when going slow.J