[Montauk Joe]

Here is a little performance data on my new Reg with the Yamaha 225 4-stroke. Boat has no T-top but did have a full tank and two people. Seas and wind were calm.

4200 = 25 mph

4600 = 28 mph

5000 = 32 mph

WOT = 42 mph

Overall I am VERY please with this boat handling, fights me a bit in following-quartering seas but is a joy to run otherwise. What about hole-shot? It's true, the 4-stroke is not as punchy as the 2 but that's fine with me. Quiet? Sure is at idle. Had to check a couple of time to make sure it was still running. AT high rpm it is, however, noisy.

[JDBer94]

The numbers look pretty good given the weight of that hull.

Do you plan on adding a T-top? From what I hear a T-top will slow the top end down between 3 and 5 mph depending on the top speed.

What about some fuel use figures!

Best of luck with the rig.

Jeff

[BigBone]

Something looks funny about those numbers. Looks like you really couldn't run much under 4,000 and stay on plane. Is that true?

Also, the numbers reflect increases in speed at a level that is much highter, if not exponential, to the increases in RPM.

For the RPM changes you note (4200...5500), at increases of 9.5%, 8.7% and 10%, the boat attains speed increases of 12%, 14.3% and 31.3% (wow), respectively. MAybe that's just the way the 4strokes work, (weak in the midrange?).


Are you running a 15.25X17 prop?

1998 Contender 25
225 Yami's

[Captain Stanman]

Joe, put your trim tabs and/or engine up in a following sea to get the bow up until you get the boat where you are comfortable.

Are you sure your nos. are correct.
Here is what my single engine 250 OX 66 23' ran with a T top, 1/2 tank of fuel, 92 gals. and 2 people:

3500 RPM 25 MPH

4000 RPM 30

4500 35

5000 40

5500 45 WOT

19 inch wheel, tabs and engine up, in the ICW.

HOw many RPM's at WOT?

If you have any other questions, you can call me at 910 326 2392.

23' Regulator, 2 200 HP Yamaha HPDI's. Charter and SKA Tournament fishing, Chair of King Mack Tourn. benefits underpriviliged kids in Eastern NC.

[Montauk Joe]

Let me answer some of the above questions with a stats from the Regulator site:

4000 rpm = 25.5 mph
5000 rpm = 35.8
6100 rpm = 43.5

Over all I think these numbers compare to mine and more so with less fuel.

- No, I am not planning on adding a T-top, I don't want the weight or the drag. If I was planning on adding radar, then maybe.

- In that following sea the tabs were up but the engine was down.

- the slowest I can stay on plane is about 3800 rpm but have not tried with tabs down so that may not be the slowest the boat can go. The "sweet spot" does seem to be between 4200 and 4400 rpm for a nice level ride, at this point small changes in rpm seem to make bigger differences in speed. Prop is the factory standard so I assume it's the 15 1/4 x 17.

[whoknows]

Joe, very interesting. You are almost the same at WOT as my Sailfish 236 with a 200 HPDI. I will run the other numbers and compare all the ones you list and get back to you for comparison.

[BigBone]

Montauk Joe,

Sorry, I forgot those 4's revved all the way up to 6,100.

I wonder what mine would do at 6100, other than blow up....

Enjoy the ride.

1998 Contender 25
225 Yami's