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Author Topic:   1992 Whaler Walkaround 23 Re-Power
rvazquez23 posted 10-04-2012 10:10 PM ET (US)   Profile for rvazquez23   Send Email to rvazquez23  
Hello. Has anyone re-powered a Boston Whaler WHALER 23 WALKAROUND with Whaler Drive with a single engine? Thanks--Rafael
6992WHALER posted 10-05-2012 12:01 PM ET (US)     Profile for 6992WHALER  Send Email to 6992WHALER     
Rafael--Use the search function. There has been talk about doing this but I am not aware of anyone who has done it.
Peter posted 10-05-2012 06:48 PM ET (US)     Profile for Peter  Send Email to Peter     
Have never seen a 23 Walkaround with Whaler Drive powered or re-powered with a single outboard. Given that they were typically powered by a pair of 150 HP or greater V6 2-stroke outboards that weighed 400 to 450 lbs, anything but the over-800-lb s4-stroke Yamaha V8 outboard may not put enough weight on the transom.
Tom W Clark posted 10-05-2012 10:30 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
I have never seen, nor even heard of, a 23' Walkaround with a single outboard, Whaler Drive or not. I doubt one exists.

Compare the classic 25' Whaler to the 23' Walkaround Whaler Drive:

Revenge 25 Whaler Drive -- LOA: 26'-6"
Boat weight: 4250 pounds
Maximum horsepower -- 450

23' Walkaround Whaler Drive -- LOA 26'-4"
Boat weight: 4300 pounds
Maximum horsepower -- 400

Very comparable, yes?

No, not at all. Look at the minimum horsepower to plane satisfactorily:

Revenge 25 Whaler Drive -- 115 HP
23' Walkaround Whaler Drive -- 275 HP

The Dougherty designed 25' classic Whaler hull is vastly more efficient that the Van Lanker designed post-classic 23' hull.

K Albus posted 10-05-2012 10:41 PM ET (US)     Profile for K Albus  Send Email to K Albus     
Here's a 23 Walkaround, no Whalerdrive, powered with a single 250: BW23WalkaroundStandardTransom.jpg
Tom W Clark posted 10-05-2012 11:02 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Well, I'll be damned. The 23' Walkaround (without Whaler Drive) has a minimum horsepower rating of 225. I have to presume this boat planes satisfactorily, so long as it is lightly loaded.
6992WHALER posted 10-05-2012 11:25 PM ET (US)     Profile for 6992WHALER  Send Email to 6992WHALER     
Just curious, has anyone ever seen a Revenge 25 with only 115 on it?
revengewanted posted 10-06-2012 12:37 PM ET (US)     Profile for revengewanted  Send Email to revengewanted     
No, I have never seen a Revenge 25 WT with a single 115 but I can say that my own Revenge 25 WT would get up to plane with a 1989 135HP Mercury when necessary.

It is also interesting to note that the Whaler Brochure circa 1993 shows a nice picture of a 23 Walkaround (no Whaler Drive)with twin Evinrude 150's. Hence, why not a single 350 for a re-power? It would be an expensive experiment!

Ridge Runner posted 10-06-2012 12:49 PM ET (US)     Profile for Ridge Runner  Send Email to Ridge Runner     
Why wouldn't you go with the E-Tec 300?
Tom W Clark posted 10-06-2012 01:01 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
300 HP is only 9 percent over the minimum horsepower rating. It would be like putting a single 125 on a Revenge 25 Walk-Through Whaler Drive.

I wouldn't do that.

Tom W Clark posted 10-06-2012 01:05 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Like George could, I can plane my Revenge 25 Walk-Throughh with only one of it's motors.

With a single 150 mounted almost 15 inches off-center and overpropped by 4 inches of pitch, the boat gets on plane easily and has a top speed in excess of 38 MPH.

I wouldn't try that on a 23' Walkaround Whaler Drive either.

K Albus posted 10-06-2012 03:51 PM ET (US)     Profile for K Albus  Send Email to K Albus     
My mistake - that's a single E-TEC 225 on a 23 Walkaround. jpg (Photo by Jim Hebert)
revengewanted posted 10-06-2012 05:25 PM ET (US)     Profile for revengewanted  Send Email to revengewanted     
A closer look at the brochure for 1993 reveals that the Whaler 23 Walkaround Whaler Drive requires dual engines. The Whaler 23 Walkaround Outboard does not.

However I still wonder if, say, a 350 Yamaha wouldn't work satisfactorily.

martyn1075 posted 10-07-2012 11:31 AM ET (US)     Profile for martyn1075  Send Email to martyn1075     
I don't see why a V8 350 Yamaha wouldn't work. Is it the best choice maybe not. The engine is just a beast it might look a little out of place as well but it should still offer the power required to lift that boat and power it through the water. Single vs double again argument when discussing its pros and cons.
Jeff posted 11-05-2014 03:07 PM ET (US)     Profile for Jeff  Send Email to Jeff     
I am reviving this thread because I remembered it after posting information in another thread. I think the info I posted would also be good to be added here.

23's in general and the Whaler Drives especially need twins for low speed maneuverability. You could get away with a big single on a standard notched transom, but I personally would not do it. The way the hull is designed has a unique and varied deadrise where at displacement (no wake / docking) speeds the keel at the bow is actually deeper in the water than the props at the stern. This makes it really tough to get that bow to swing, and if you get caught in a cross wind you can get in big trouble if you are not on top of things. The Whaler Drive even has more of a difficult time swinging at displacement speeds here is why. With the standard / notched transom on the Outboard model the prop thrust in reverse is being forced completely under the hull. On the Whaler Drive the motors and props are set back 3'+ back from the transom and are raised up a bit. This makes a lot of the reverse thrust get pushed against the flat of the transom and not under the hull.

On our 23 Walkaround Whaler Drive I am always under heavy power tractor steering (engines straight and using one engine in forward and the other in reverse) to get the hull to swing while docking. If it's blowing, I am never without power because you do not want to let the boat get caught by the wind.

Another thing I do you to help the maneuvering on the Whaler Drive model is, I keep the motors trimmed at least vertical if not up a bit to get the prop thrust move under the hull. On the Whaler Drive if the motors are trimmed all the way in (down) the motors are actually 5-10 degrees in from vertical. This is helpful when coming on to plane because it allows you to keep the bow down on "take-off". However at docking displacement speeds it is actually not only directing the thrust at the transom but up at the bounyance box as well greatly reducing the effectiveness of the thrust.

Here is a video of me piloting our 23 Walkaround Whaler Drive into a berth on a dead calm day. You can see it takes a fair amount of throttle to get it to swing.

jimh posted 11-05-2014 11:56 PM ET (US)     Profile for jimh  Send Email to jimh     
Moved to PERFORMANCE in order to reopen discussion.
Teak Oil posted 11-06-2014 07:45 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Tom's math is a bit flawed, 300hp is approximately a 30% increase over the 225hp minimum recommendation, not 9%.

The 23 propped properly could get on plane with no problem with a 300. Top speed would be fair, in the upper 30's to low 40's.

Around the docks would be another matter, as Jeff explained.

acseatsri posted 11-07-2014 09:38 AM ET (US)     Profile for acseatsri  Send Email to acseatsri     
My take from the large difference in the numbers between the Whalerdrive and standard outboard version is that moving all that weight 30" back on the transom makes this a vastly different boat as far as handling and efficiency are concerned.

Absent the Whalerdrive, it looks like this boat performs comparably to most other boats in its size and weight class. Going to a single engine not setting back 30" lightens up the transom around 300 lbs and probably doesn't squat down in the water nearly as severely when coming onto plane, nor take as much power to hold it on plane.

Tom W Clark posted 11-14-2014 01:17 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Bob -- I'm rather good at math, spelling not so much. 300 is about 9 percent more than 275, the minimum HP rating for the Whaler 23 Walkaround Whaler Drive in its final incarnation. Get your slide rule and check me on that if you like.

If you really want to split hairs and limit the discussion to the 1992 Whaler 23 Walkaround Whaler Drive, the subject of this thread, the minimum recommended power is 300 HP.

In fact, in 1992, the minimum recommended power for the Whaler 23 Walkaround (notched transom) is 300 HP as well.

In all years, the maximum HP rating of both the Whaler 23 Walkaround and the Whaler 23 Walkaround Whaler Drive is 400 HP. As a practical matter that means two 200 HP outboards.

When the Whaler 23 Walkaround was introduced in 1991, Whaler, then owned by Reebok, did not even have a minimum recommend power rating for this boat. The 1991 catalog, which only had a drawing of this new model instead of a photo, has a note in the specifications page suggesting contacting your dealer for minimum power.

My take on this is that the factory had really not figured it out out through testing. By 1992, they had a 300 HP minimum for both models which would be easy: a dealer could use a pair of twin V-6 150s form any manufacturer.

By 1993, the factory dropped the minimum for the Whaler 23 Walkaround Whaler Drive down to 275 HP. I suspect 275 HP minimum probably allowed some dealers to use a single 275HP V-8 outboard from OMC *or* a pair of 140 HP motors in lieu of a pair of 150s.

The notched transom version of this model was given a minimum rating of 225 in 1993 reflecting, perhaps, a desire by some dealers or customers to use a single motor, 225 HP being the largest available at that time, with a very few exceptions, the V-8 OMCs among them.

225 HP was never recommend for the Whaler 23 Walkaround Whaler Drive model.

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