Modifying 2005 130 SPORT Hull

Optimizing the performance of Boston Whaler boats
Miss Conduct
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Modifying 2005 130 SPORT Hull

Postby Miss Conduct » Wed Feb 23, 2022 9:59 pm

[Implied question:]

Q1: Will removing the hook in the hull running surface of a 2005 130 SPORT help the boat to reach plane and maintain plane with a 20-HP engine?

BACKSTORY: I want to use the least horsepower engine on a 130 SPORT to be used by my children that will allow the boat to reach plane. I am considering a 20-HP engine.

Q2: should the hook stay or go?

jimh
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Re: Modifying 130 SPORT Hull

Postby jimh » Thu Feb 24, 2022 9:14 am

Test the boat with a 20-HP engine before you begin to make a significant (and possibly completely unnecessary) modification to the 130 SPORT hull.

Jefecinco
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Re: Modifying 130 SPORT Hull

Postby Jefecinco » Thu Feb 24, 2022 10:37 am

Q3: Does the 130 Sport hull have a hook?
Butch

dtmackey
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Re: Modifying 130 SPORT Hull

Postby dtmackey » Thu Feb 24, 2022 12:46 pm

Jefecinco wrote:Q3: Does the 130 Sport hull have a hook?


That's what I was thinking. I know the 13 has a hook, but not sure about the 130. Also, didn't the 130 go through a design change and kept it's 130 designation.

Q4: what hull is being discussed?

D-

Miss Conduct
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Re: Modifying 130 SPORT Hull

Postby Miss Conduct » Thu Feb 24, 2022 2:12 pm

[The boat under discussion is] a 2005 130 SPORT.

I have a Mercury 30-HP engine on order.

Q5: Is the hook worth eliminating?

Q6: What are the effects of eliminating the hook?

dtmackey
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Re: Modifying 130 SPORT Hull

Postby dtmackey » Thu Feb 24, 2022 4:21 pm

My friend has the first-generation 130 SPORT like [the boat under discussion]. The first-generation 130 SPORT is one heavy boat that needs lots of power. He repowered with a E-TEC 40-HP because he didn't think the four-stroke engines under 40-HP were up to the task. He wasn't looking for a speed demon; he just wanted to make sure it would plane off with several people in the boat. and his young daughter was the primary user of this boat. Looking back he's happy he went with the 40-HP

The classic 13-foot Boston Whaler hulls would do just fine with 25 to 30-HP, but those hulls were half the weight of the 130 model.

D-

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Phil T
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Re: Modifying 130 SPORT Hull

Postby Phil T » Thu Feb 24, 2022 4:43 pm

I have openly stated that the later generations of 130 Sport and SuperSports should be equipped with 50 or 60-HP engines due to their weight and "HP-rating of convenience."

Each generation of the Sport 13, 13 Sport 130 Sport and 130 SuperSport were progressively heavier hulls with the same HP rating.

Modifying the hull to offset the engine horsepower is not a wise effort. More horsepower is the effective method to ensuring planing with a moderate load.

YEAR  MODEL          LBS
1990 Sport 13 360
2001 13 Sport 580
2004 130 Sport 600
2010 130 Sport 640
2020 130 SuperSport 695


All models have a HP rating of 40-HP per Boston Whaler
1992 Outrage 17
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003

jimh
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Re: Modifying 130 SPORT Hull

Postby jimh » Fri Feb 25, 2022 7:03 am

Miss Conduct wrote:Q6: What are the effects of eliminating the hook?

The value of the boat will be decreased.

dtmackey
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Re: Modifying 130 SPORT Hull

Postby dtmackey » Fri Feb 25, 2022 8:21 am

jimh wrote:
Miss Conduct wrote:Q6: What are the effects of eliminating the hook?

The value of the boat will be decreased.


Have to agree with this. There doesn't seem to be demand for modified Whaler hulls in any size, but people pay a premium for an unmolested hull in great condition.

D-

Jefecinco
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Re: Modifying 2005 130 SPORT Hull

Postby Jefecinco » Fri Feb 25, 2022 10:00 am

I have doubts that a 2005 130 Sport hull is designed with a hook. Anyone with an identical hull who can determine the existence or not of a hook please provide the answer.
Butch

Miss Conduct
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Re: Modifying 2005 130 SPORT Hull

Postby Miss Conduct » Tue Mar 01, 2022 2:44 am

Thanks for all your replies. I saw it mentioned elsewhere. I thought to ask here.

I am a new Boston Whaler boat owner. I don't have any hopes that this 2005 130 SPORT boat will be of any collectable value some day. I bought the boat for my kids to have fun and fish the lake. I got [the boat] missing the benches and console. I'll let my boys determine how to outfit [the 2005 130 SPORT] and assist in building their boat. This summer [the 2005 130 SPORT] will live with a tiller outboard--but I have a feeling we may cobble together a homebrew electric outboard in the future.

jimh
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Re: Modifying 2005 130 SPORT Hull

Postby jimh » Tue Mar 01, 2022 7:17 am

Miss Conduct wrote:I saw it mentioned elsewhere.
What does "it" refer to?

jimh
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Re: Modifying 130 SPORT Hull

Postby jimh » Tue Mar 01, 2022 12:48 pm

Jefecinco wrote:Q3: Does the 130 Sport hull have a hook?
I do not recall ANY mention of the 130 SPORT boat having a hook in the hull running surface. I suspect that the OP has become confused about the 130 SPORT. Perhaps the OP has read about an intentional hook designed into a different model of Boston Whaler boat.

It is widely known the original c.1958-design for the 13-foot hull included a hook in the hull.

On the other hand, the suggestion that the 130 SPORT also has a hook in the hull is relatively unknown, as based on the comments in this thread.

Also, the purpose of the hook designed into the original 13-footer was to improve its ability to reach plane with minimum power.

In this thread the OP seems to have become confused, and appears to want to REMOVE the hook--if there actually is one--in order to make the boat able to get on plane with minimum power. Removing the hook--if there were one--would have the OPPOSITE effect to what the OP intends to accomplish.

Further, hacking up the hull of a fairly recent boat to modify the hull bottom running surface can only be certain to accomplish two things:
  1. reduce the value of the boat
  2. reduce the structural integrity of the boat.
As I said earlier, the best way to find out if a 20-HP engine will produce the desired performance with the boat under discussion carrying the intended crew weight is to put on a 20-HP engine and test it--BEFORE taking a grinder to the hull bottom.

Miss Conduct wrote:I am a new Boston Whaler boat owner.
I offer this advice because I want to help the OP avoid making an unnecessary and probably costly modification to their first Boston Whaler boat.

Miss Conduct
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Re: Modifying 2005 130 SPORT Hull

Postby Miss Conduct » Tue Mar 01, 2022 3:45 pm

I am not going to hack up the bottom. I will remove the many layers of thick bottom paint, and then paint again.

As a new Whaler owner I have been reading to learn what I can.

Thanks for the thorough explanation. I will repaint the boat and go boating.

https://i.imgur.com/f5iRr1M.jpg

https://i.imgur.com/wY0GFyL.png