Actual mph(speed) comparisons.Post your highest speed.

Michael Belcher · Nov 7, 2005

My 225 Mercury 2 stroke was recently rebuilt.Specifically,I had air getting in the fuel through some check valves and gaskets(new ones are neoprene-old were just rubber. My problem was the boat was slow to plane and just slow.Pitch on prop is stainless and 19. My boat is a 26ft. center console trying to hit 50mph.Please post your boats top speed so I can compare. Should I buy a 250hp or 300hp or am I good? specifically I'd like outboard comparisons.My top speed so far is 48mph with a 225hp motor on a 26ft. boat.

Kenny Bush · Nov 7, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

I think your are in the max zone. You may have to go too twins to get up there. A 300 verado may get you there but it's expensive. My 25' Fountain CC had a single 200 and went 46-48 MPH. Put a 225 EFI on and got to 55 empty, but you could not hardly get on plane with 4 fisherman and equipment. I also propped it out and found the vented 19 to be the best, and my fountain is extremely light. My Chris Craft Scorpion CC, 23' has a 3.4L 300 merc, and it moves 55-60 loaded up. I recently put a bracket on the fountain and I am putting 2 225 EFI's on it. I am hoping for 60-65 loaded, with 70+ empty. My calculations should put me in the Zone. Another factor is deadrise.... What is yours, and what type of hull is it?? Is it heavy/light??

Michael Belcher · Nov 8, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

My hull is light,2700 lbs. dry with a 23 1/2 degree deadrise.Should I be getting more than 48mph out of this motor? Is there anything I, as a non-mechanic, can do to increase performance? I'm using synthetic blend oil(pennzoil), I flush the motor each time, I put new plugs in every 6 months, I open my Racor filter each usage to drain any water or sludge, and my prop is clean and straight at 19 pitch. Thanks for the reply.

verojoe27 · Nov 8, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

21 foot center console (hull=2,400 lbs), with a Mercury150 Black Max. and 17 pitch SS prop= GPS 42mph at 5800 rpm

Kenny Bush · Nov 8, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

Scarab1, I believe you are at the best you be with that motor. That is a pretty deep v, and takes a little more HP to keep it up on the keel. You can do what I did, and switch to an EFI which will give you more maximum RPM's, or go to a bigger motor all together. You are doing all the right stuff in regards to maintenance, but you need more RPM's or a bigger motor (so you can prop up to a 21' or 23').

DoctorCAD · Nov 9, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

18' Ebbtide Fish-n-ski 150 Black Max SS prop<br />63 MPH GPS verified. Scary at that speed.

Michael Belcher · Nov 10, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

Thanks- I'm satisfied and will finally enjoy the boat! Whew!

buck9475 · Nov 11, 2005

Re: Actual mph(speed) comparisons.Post your highest speed.

1993 proline 22' cuddy cabin, Merc 200 efi, 17p vented mirage, 3 people t-top,full gas tank, 49 mph 5,700 rpms, gps cert.

cbavier · Apr 18, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

1986 Four Winns Horizon 190 , V-6 Mercruiser, Alpha 1 , 38 MPH GPS certified at 4800 RPM

Harker · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

14.5 Devlin Black Brant 2 home made...98 Mariner 25hp with 13 pitch prop...29mph GPS with me and my 100lb lab.

Bondo · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

My 1974 Starcraft Islander 221, 4.3LX, 1.65:1 Alpha 1, Torque-Shift Prop 11"/20",.......
In Full Fishing/ Trolling dress will pull 42mph,gps, at 4900rpms in Freshwater,.......
And 53mph,gps, in Saltwater........

deejaycee_2000 · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

21 ft raven speedboat with 475hp johnson offshore 1 motor .... 160mph (gps) at 10 000 rpm ......

deejaycee_2000 · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

hey bond-o ..... that is really interesting .... why would your boat be 11mph faster in saltwater? .......

srt4wad · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

1977 ArrowGlass with 1985 Johnson 60 VRO and one person I have gotten it to 29mhp.

tommays · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

You have not had a rush till you pop a 24' dingy on plane surfing over a wave and see the Knot meter break 20

And the roster tail comeing off the rudder is a site to behold

Tommays

Frugal Floater · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

18' SeaPro Center Console with 90HP Yamaha 2-stroke... 46 mph with 1 person.

ParallaxBill · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

My 1973 18' Glassmaster Tarpon tri-hull equipped with it's original L6 165 HP Mercruiser will do 41 mph (gps) @ 4,300 rpm with two adults and half a fuel load on board. The prop is an aluminum 14.5x19.

Plenty fast for me at my age in a 34 year old boat.

JB · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

My Boston Whaler Sakonnet 16 w/ Johnny 70 saw 90 mph passing slow traffic on I95 back in 1982.

bjcsc · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

Glass-flat water, 62mph, gps, at 4100rpm with 4 on board...

cbavier · Apr 19, 2007

Re: Actual mph(speed) comparisons.Post your highest speed.

deejaycee_2000

Since bond-o didn't answer your question

why would your boat be 11mph faster in saltwater?

I'll guess maybe the saltwater has greasy qualities and that's why he?

bond-o says
"Any Grease is Better,..... Than No Grease at All....... "

Actual mph(speed) comparisons.Post your highest speed.

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