Boats stated max hp is 50, can I use a 55 hp.

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Gibbles

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Re: Boats stated max hp is 50, can I use a 55 hp.

ok back on topic.

lmsmith, i would stick to the rated horsepower of boat............... now where is that motor? I'll go pick it up, my boat is rated for 60 hp, and I only have a 30 hp on it, LOL.

what part of Oklahoma are you in?

lol

I can beat that, my boat is rated for 55hp, I have a 20hp on it. :p







but I do have a 65hp in the works :D
 

lmsmith

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Re: Boats stated max hp is 50, can I use a 55 hp.

Do you have a thread going over in resto?

I did. I was told that I should quite posting questions outside of the restoration post that had pictures, it was confusing some folks, so I let it die that way I can post individual questions as needed. I'm getting better discussion with my individual questions. I'll roll everything up in a restoration post when I wrap the boat up.
 

dazk14

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Re: Boats stated max hp is 50, can I use a 55 hp.

What model year are you considering?
 

lmsmith

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Re: Boats stated max hp is 50, can I use a 55 hp.

If you mean engine.....really any date. Something I can fix up. Currently I've got the 1956 Evinrude Bigtwin Electric 30hp. I've read a lot of good about it.

Do you have a recommendation? I think I've settled on a 50hp, peace of mind I guess.
 

dazk14

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Re: Boats stated max hp is 50, can I use a 55 hp.

If you mean engine.....really any date. Something I can fix up. Currently I've got the 1956 Evinrude Bigtwin Electric 30hp. I've read a lot of good about it.

Do you have a recommendation? I think I've settled on a 50hp, peace of mind I guess.

If I recall correctly, you were looking at a specific 55hp for sale. Simply asking the specific model year of the aforementioned outboard.
 

Thadeous85

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Re: Boats stated max hp is 50, can I use a 55 hp.

I ran a 85 on a 16.5 Aluminum boat that was only rated for a 75 for three years and was stopped by the law at least five times for routine checks and they never even mentioned it. Five over won't hurt and what scenario would there be that you would be in a law suite that would matter that you had five more HP than you were supposed to? just my two cents...
 

zopperman

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Re: Boats stated max hp is 50, can I use a 55 hp.

I ran a 85 on a 16.5 Aluminum boat that was only rated for a 75 for three years and was stopped by the law at least five times for routine checks and they never even mentioned it. Five over won't hurt and what scenario would there be that you would be in a law suite that would matter that you had five more HP than you were supposed to? just my two cents...

:facepalm:
 

lmsmith

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Re: Boats stated max hp is 50, can I use a 55 hp.

If I recall correctly, you were looking at a specific 55hp for sale. Simply asking the specific model year of the aforementioned outboard.

1976

Why do you ask?
 

Gibbles

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Re: Boats stated max hp is 50, can I use a 55 hp.

My FIL has a OMC boat that is rated for a 75hp, it left the dealer to the orig owner with the 85hp (1977).


My main worry when putting a larger motor is weight.
 

dazk14

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Re: Boats stated max hp is 50, can I use a 55 hp.

There are other issues than weight.

Just an FYI - An E-tec 50HP outboard will run rings around that 1977 55hp - throughout the entire power band.

Based on the known fact that these modern engines are significantly more powerful than their older brethren - where's the outrage from this forum?

My shop is in the insurance capital of the world...Trust me, Actuarians haven't just fallen off the turnip truck. I have had conversations with them about this very topic - we service their boats and I have customers with "Oversized motors" that have full insurance coverage". Yes, they have specific language regarding capacity plate and actual hp.

Here is very brief portion of conversations. Speed is an important issue as it can cause more damage, requires quicker decisions and countless more issues and 50mph seems to be where risk starts to greatly increase.

Whether the boat in question can do 30ph or 33mph with a 55hp is simply a VERY small risk in comparison to boats that can go SIGNIFICANTLY faster - thus the faster boat puts himself and others at much greater risk of injury. Based on their extensive data - it's a fact.

2 were from Travelers, 1 from Progressive, and they indicated they have enormous amounts of data that factors into the equations. They're in business to make money and use empirical data to set rates - not hysterical data. They are WELL AWARE horsepower ratings have changed over the years, and also WELL AWARE that a 150HP model could -in reality - be a 165hp.

So, based on risk to the public, driving a 50mph capable boat is MUCH riskier than the boat in question - so anyone that chimes in here about the "Danger to us all" in this situation - better be running go slow boats.

In addition - where's the outrage that a 150hp rated boat from 1980 could easily be equipped with a motor that could produce 165hp which would be 25hp "Overpowered".

Even on a modern boat, it would be 15hp over. For years Suzuki's were constantly pushing the max HP envelope. When you have your motor installed, do you ask for dyno verification that the as-built isn't "Over". Don't you want to avoid disaster? Obviously a rhetorical question.

The policies I've mentioned will cover the policy holders. Just as Jimmy Durante's(over the limit) nose was covered by Lloyds. Just as driving 40 in a 35 zone and running into a tree - your covered. Even the illegal drunks are covered.

In many parts of the US and many parts of the world- it is not illegal - to put a 55hp on a 50 rated. I also spoken to the Coast Guard and their view is that it is not illegal. Certainly, laws and interpretations are constantly changing - so updates are welcome.

It's the moderator's bat and ball here. They're welcome to run this forum as directed -your doing your job, which is understandable.

Overall, I think the all too common forum member self rightous response "I'm outraged you even suggested 5 over!" needs to be tempered a bit.
 

NSBCraig

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Re: Boats stated max hp is 50, can I use a 55 hp.

It's always the same when this question is asked.

It all starts with completely baseless banter about how your going to ruin your life if you do.

It's nonsense plain and simple, with absolutely zero real world proof.

Do you realize that insurance companies advertise that the cover illegal parts installed on your belongings?

I just love the we'll replace your ape hangers on your bike one! They are not legal in any state in the country and would be an easy way out of paying any claim you had, but no that is not the thought pattern at all of the insurance industry.

No they'll pay just like they will when you put oversized tires on your truck even though they are illegal in your state.

Seriously I fully understand the reasoning for the forum's point of view on it to protect them from liability, but dial the BS back a bit please cause that's what it is. The sky is not falling, the world will not end, your not going to lose your house, it means nothing.

Please dial l it back with some truth.
 

sturgis

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Re: Boats stated max hp is 50, can I use a 55 hp.

[As a matter of policy we do not allow recommendations or even acceptance of actions that are contrary to recommendations (including ratings assigned) of manufacturers.

I don't think it's a question of legal or illegal to exceed the manufacturers recommendation, hot rodders have been doing that for years, however I would think long and hard before exceeding the manufacturers limits on a boat hull. It's a question of integrity of the hull and particularly the transom. The transom is designed to hold a certain amount of weight and force from the engine. I recently found cracks in my transom on both sides of the engine well on my 72 tri-hull. I could see it expand when I lifted the engine. It has a 85 HP V4 Evinrude which is the max for the hull. These cracks are the result of years of stress on the material. I have since removed the original plywood on the inside and replaced it, refiberglassed, installed an aluminum plate across the inside and lastly beefed up the all the corners. When all is said and done it's about twice it's original strenght. Again I am not exceeding the manufacturers limits.

If you exceed the limits and have an accident that is due to a mechanical failure and someone is injured or property damage occurs than yes you could get sued. As I said think long and hard, at a minimun you will need to evaluate the effects of the bigger engine. How much give is experienced from raising it up and down, is there noticable give when you power up on plane, those types of considerations. If you detect any weekness than you will need to reinforce, make modifications, this could be expensive to get right with an aluminum boat. If your not an engineer or experienced boat builder or marine mechanic than you probably should stay with the manufacturers limits or get help in evaluating the effects of exceeding them.
 

LSP_NH_1974

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Re: Boats stated max hp is 50, can I use a 55 hp.

I did some searching around, and , I found this on a boating safety online course approved by the US Coast Guard - I don't have the link, because I handwrote this part of the website and put it on my bulletin board hoping to commit it to memory.

Vessels under 20ft. length must have a US Coast Guard "capacity plate" in the steering or helm area - capacity information includes total weight of persons, equipment, stores, fuel , engine assembly and steering controls. Capacity plate also indicates the "recommended safe limits of engine power" for the boat's hull. It may NEVER be EXCEEDED!!!
This calculation is based on the recommended gross load for outboard powered boats only. Overloaded/overpowered boats may sit lower in the water, making the boat susceptible to SWAMPING by it's own wake or passing boats wake.


I like the idea posted earlier about buying the $100 55hp and selling or trading it. I stated in another thread that I work with Cub Scouts and our #1 rule is +SAFETY FIRST +
 

sturgis

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Re: Boats stated max hp is 50, can I use a 55 hp.

This calculation is based on the recommended gross load for outboard powered boats only. Overloaded/overpowered boats may sit lower in the water, making the boat susceptible to SWAMPING by it's own wake or passing boats wake.

"Gross load" People, gear, engine. According to this if you reduce one you can increase another? Also if it's about how low you sit in the water I would ask how much effect 5 HP has. If the increased power is from carburation, engine bore, etc. then how much difference will it make. If you are boating responsibly you need to always check how your loaded and be aware of how you are sitting in the water. Absolutely "Safety First" however I still think that if your transom will stand the load than how many people, how much gear and where you place them in the boat will have much more effect on Safety than an extra 5 HP. A 55 HP engine may be far more safe than a "Overloaded" 50 HP + extra gas can + iced down cooler of beer.
 

dazk14

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Re: Boats stated max hp is 50, can I use a 55 hp.

I did some searching around, and , I found this on a boating safety online course approved by the US Coast Guard - I don't have the link, because I handwrote this part of the website and put it on my bulletin board hoping to commit it to memory.

Vessels under 20ft. length must have a US Coast Guard "capacity plate" in the steering or helm area - capacity information includes total weight of persons, equipment, stores, fuel , engine assembly and steering controls. Capacity plate also indicates the "recommended safe limits of engine power" for the boat's hull. It may NEVER be EXCEEDED!!!
This calculation is based on the recommended gross load for outboard powered boats only. Overloaded/overpowered boats may sit lower in the water, making the boat susceptible to SWAMPING by it's own wake or passing boats wake.


I like the idea posted earlier about buying the $100 55hp and selling or trading it. I stated in another thread that I work with Cub Scouts and our #1 rule is +SAFETY FIRST +

Here comes the hysteria... You are quoting a boating safety course - NOT law. From the Coast Guard personnel that I have spoken with - the LAW applies to manufacturer requirements, etc.. I really don't have the time to go through this.

States are welcomed to write more stringent regulations, and some do.
 

nwcove

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Re: Boats stated max hp is 50, can I use a 55 hp.

:facepalm:why take the chance? whether it be for the safety of the occupants of your boat or others, or the chance of being a part of a civil lawsuit? is an extra 5mph worth it? as mentioned early on in this post, for $100 , get the the motor, trade or sell for one that keeps you on the right side of the rules.
this aint rocket science.
 

dazk14

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Re: Boats stated max hp is 50, can I use a 55 hp.

:facepalm:why take the chance? whether it be for the safety of the occupants of your boat or others...

That said, I have customers that think it unconscionable that anyone would head out on the water with an outboard older than 5 years, never mind the horror stories they have heard about 2 line fuel tanks.:eek:

Edit: NW, tell me you don't have one of those 2 line floating bomb fuel tanks?;)
 
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nwcove

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Re: Boats stated max hp is 50, can I use a 55 hp.

lol dazk, i do have one of those "2 line floating bombs", and its not a bad setup if its maintained and inspected. every boat is a potential "bomb".... if you just run em, and dont do the checks. the original poster had concerns about hp rating for his/her setup. my lil 5.5 with the dual lines isnt anymore dangerous(they do have their issues) than a poorly maintained modern setup. but if they find my boat, upside down, with no survivors, and the motor is more than the tag says.......its a tradgedy with questions.
 

JimS123

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Re: Boats stated max hp is 50, can I use a 55 hp.

These questions are really dumb dumb dumb. Its all a matter of common sense and honesty and integrity.

A boat is there for family fun. If you need to buy a bigger motor than the manufacturer recommended to go faster, maybe you should have invested in a different boat. If you find a cheepie that is too big, chances are its cheep for a reason and it'll come back to bite you in the end anyway.

If you, God forbid should have an accident with Bubba, it probably won't matter. Cause he's clueless.

But if you have an accident with ME, and its your fault, the first thing I'll do is check the HP and the plate and if it's overpowered, I guarantee that my lawyer will ensure that I own your boat, car, house and firstborn.
 
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