Boat content..How to Re-power ?

[done]

I bought this as a second boat for Havasu....19 ' Hybrid center console, 115 yamaha sho Outboard. After break in trying different props, 4500 RPM = 23 MPH trying to stay on plane.
6400 RPM Pinned = 36 MPH . Tag on the boat says Max HP 115, This boat would be great if it had more power, I would be happy with a cruising speed of around 45 or so . Is there
any way i could maybe run a Yamaha 200 sho. The weight diff is only about 150 lbs between the two. I love the size of this boat because i can handle it myself, Rides better than your
average runabout. Also i did not want to spend the dollars for a twin, bigger boat. Any Idea what to do ?

 

[ChrisV]

Put the 200 on it.

 

[Backlash]

I edited my post after I did a quick search and it seems like your numbers are right on for that manufacturer.

I'd be a little disappointed with those numbers to be honest.

 

[FreeBird236]

Seems like you need to find out why it's not achieving the factory test speeds. A mile or two is one thing but your results are way off. Are you using the same prop and height settings? Your prop in the pic doesn't seem to be stainless steel.

 

[fat rat]

Tag doesn’t say max horsepower, so I would say that 115 is the recommended. It’s all n the wording and liability.

 

[lbhsbz]

Seems like you purchased it new, I'd call the dealer and ask them why the boat only does 36mph when the literature clearly states it should do 42mph?

They'll probably do nothing, but it's worth a shot.

Spec sheet has the vent plate at 1" above the keel. You might try raising the engine one hole and see what happens....that's free (if you have an engine hoist/lifting ring).

How was the boat loaded during your testing? Get as much weight toward to the back as possible.

Neighbor of mine (new to boats) bought himself a little 18' Galaxy with a 135 merc on it. We went to the river and the boat would barely get on plane, and wouldn't do better than about 20mph. Motor was running fine, hitting on all 6, good compression, fresh fuel...we tried a portable tank with new line...no difference. I happened to peak under the deck and found:

100ft of 3/8" anchor chain and a 40lb anchor
1 spare starting battery
1 trolling motor
1 full 5 gallon can of fuel
another 200lbs or so of shit that didn't need to be there.

He also had 2 batteries in the back.

We got rid of all the shit under the deck, and ditched one of the batteries in the back. Boat ran a bit over 40 and performed as it should.

He used to fish Bristol Bay many years ago so I had to break him of his ways....don't need 100ft of chain and a 40lb anchor to anchor a 18' boat in a river that's 8' deep, and there's a pull start rope inside the cowl that's significantly lighter and more reliable than 2 extra starting batteries.

 

[Done-it-again]

You are going to need a 200-225 if you want a “cruising” speed in the mid 40’s.

 

[Singleton]

Most marine shops will not install over what the plate says (liability reason).
They will sell you a new 200hp and maybe even trade you for the 115, but then install is on you.
I would make sure stern has the necessary support brackets to support the weight of the 200 and …..

 

[C-Ya]

I bought this as a second boat for Havasu....19 ' Hybrid center console, 115 yamaha sho Outboard. After break in trying different props, 4500 RPM = 23 MPH trying to stay on plane.
6400 RPM Pinned = 36 MPH . Tag on the boat says Max HP 115, This boat would be great if it had more power, I would be happy with a cruising speed of around 45 or so . Is there
any way i could maybe run a Yamaha 200 sho. The weight diff is only about 150 lbs between the two. I love the size of this boat because i can handle it myself, Rides better than your
average runabout. Also i did not want to spend the dollars for a twin, bigger boat. Any Idea what to do ? View attachment 1237664

I think I might have found the problem.

Is that a painted aluminum prop in the pic?

Switch to a SS prop and report back.

 

[Orange Juice]

I think I might have found the problem.

Is that a painted aluminum prop in the pic?

Switch to a SS prop and report back.

It might even be one of those plastic type.

 

[Sleek-Jet]

In Havasu on a warm day the performance is going to be down.

 

[done]

Seems like you need to find out why it's not achieving the factory test speeds. A mile or two is one thing but your results are way off. Are you using the same prop and height settings? Your prop in the pic doesn't seem to be stainless steel.

Yes the OEM 13 1/4 X15 is the one that is on there, Tried a Stainless 13 1/4 X 17 seems right, the prop cavitated at high speed and went slower .

 

[done]

I edited my post after I did a quick search and it seems like your numbers are right on for that manufacturer.

View attachment 1237670

View attachment 1237671

I'd be a little disappointed with those numbers to be honest.

Me Too !

 

[done]

Most marine shops will not install over what the plate says (liability reason).
They will sell you a new 200hp and maybe even trade you for the 115, but then install is on you.
I would make sure stern has the necessary support brackets to support the weight of the 200 and …..

The transom is all boxed in, I think i could hang twins on it.

 

[done]

I think I might have found the problem.

Is that a painted aluminum prop in the pic?

Switch to a SS prop and report back.

I think I could hit the dealer numbers if i keep playing with it. Can I up this HP to 200 and still be legal, And do you think a 200 HP will at least get me to a better cruising
speed in the low 40,s

 

[lbhsbz]

Yes the OEM 13 1/4 X15 is the one that is on there, Tried a Stainless 13 1/4 X 17 seems right, the prop cavitated at high speed and went slower .

I don't understand how a prop can cavitate at high speeds unless you had it trimmed to the moon. You're saying you saw higher RPMs and fewer MPH wide open with the bigger prop?

 

[Bowtiepower00]

It looks like there are a couple of outfits overseas that provide tuning for that engine, but I didn’t dig far enough to look for what years they cover. Might be worth a shot if prop and engine height don’t get you to where you want to be.

 

[C-Ya]

I think I could hit the dealer numbers if i keep playing with it. Can I up this HP to 200 and still be legal, And do you think a 200 HP will at least get me to a better cruising
speed in the low 40,s

Let’s start with entertaining making the boat faster through replacing engine.

The Yamaha 200hp XCA is a 4 cylinder. It’s power band will be in the higher rpm’s. However, it is easier to switch out the same brand of motors, since each brand has their own throttle controls and other accessories.

The most bang would be installing a Mercury 225 6 cylinder. (It does come in a reduced tune 200hp also) What is nice about the Mercury is that it just has a better powerband. It automatically trims itself for best mileage and a few other features. It has great motor access too. They should be close in weight.

There is nothing illegal about doing this. Boat manufactures that are members of the Marine Manufactures Association, set limits on horsepower to their members. Most of the biggest names in boating are members. It should be noted that the boats built for Parker and Havasu, are made by manufacturers that are not members. That’s why they have no horsepower restrictions.

There is no reason why the boat cannot be insured. I just want to quell those thoughts.

Looking at the boat, there could be an issue with the scuppers being lower in the water, but the worst that can happen from that, is that there might be some water occasionally in the back of the boat. But not enough to worry about.

Do not modify your present motor. It is worth the most being stock. Still under warranty ads even move value. How many hours to currently have on the motor?

Also, I just looked again at your boat pic. I would highly consider getting trim tabs. It will give even more ability to properly trim the boat.

 

[C-Ya]

I think I could hit the dealer numbers if i keep playing with it. Can I up this HP to 200 and still be legal, And do you think a 200 HP will at least get me to a better cruising
speed in the low 40,s

I forgot to answer the question……

The 225 Merc might break 50 since your boat is so light.

The 200hp will definitely get you to mid 40’s.

My 200hp Yamaha propelled my 5300lb boat to 38 to 40. For comparison.

 

[Gelcoater]

I bought this as a second boat for Havasu....19 ' Hybrid center console, 115 yamaha sho Outboard. After break in trying different props, 4500 RPM = 23 MPH trying to stay on plane.
6400 RPM Pinned = 36 MPH . Tag on the boat says Max HP 115, This boat would be great if it had more power, I would be happy with a cruising speed of around 45 or so . Is there
any way i could maybe run a Yamaha 200 sho. The weight diff is only about 150 lbs between the two. I love the size of this boat because i can handle it myself, Rides better than your
average runabout. Also i did not want to spend the dollars for a twin, bigger boat. Any Idea what to do ? View attachment 1237664

While it won’t be “free” have you looked at the bottom and made it straight?
Lots of people wanting more speed instantly think more engine.
Few consider the running surface that engine has to propel.
In some cases, adding power just amplifies a bottom issue.

Before you go buying props, or doing something costly, check the bottom.
Might cost you some elbo grease, bribing a buddy with beer to help, and a little time.

 

[lbhsbz]

While it won’t be “free” have you looked at the bottom and made it straight?
Lots of people wanting more speed instantly think more engine.
Few consider the running surface that engine has to propel.
In some cases, adding power just amplifies a bottom issue.

Before you go buying props, or doing something costly, check the bottom.
Might cost you some elbo grease, bribing a buddy with beer to help, and a little time.

If you add enough engine...the bottom doesn't matter

 

[Wheeler]

I bought this as a second boat for Havasu....19 ' Hybrid center console, 115 yamaha sho Outboard. After break in trying different props, 4500 RPM = 23 MPH trying to stay on plane.
6400 RPM Pinned = 36 MPH . Tag on the boat says Max HP 115, This boat would be great if it had more power, I would be happy with a cruising speed of around 45 or so . Is there
any way i could maybe run a Yamaha 200 sho. The weight diff is only about 150 lbs between the two. I love the size of this boat because i can handle it myself, Rides better than your
average runabout. Also i did not want to spend the dollars for a twin, bigger boat. Any Idea what to do ? View attachment 1237664

Nice looking boat!

 

[oldboatsrule]

Is the stainless prop new?
If not new have you eliminated the hub being spun ? Slipping at higher rpm is usually sign of a loose hub.

 

[lbhsbz]

Is the stainless prop new?
If not new have you eliminated the hub being spun ? Slipping at higher rpm is usually sign of a loose hub.

Great point....and don't overlook the prop just being a piece of shit. I found a prop my boat absolutely loves....it does everything better than every prop I've ever used, but I could use more pitch....turning 7000rpm at 81-82mph. So I called the manufacturer and ordered the next bigger pitch (26"). 7400rpm and 73mph. Went back and traded it for another one....7200rpm and 76mph. Put the 24P back on, 82mph @ 7000rpm....and it pulls up a skier almost as good as a 21P through hub on my old 200merc. I'm temped to try another one...maybe a 28? or just go down and grab all the 26P he has and try each one until I find the one that works right. Having mine repitched is outta the question because I don't want my unicorn to get fucked up.

Props have a lot of hand work, and a lot of variation. Don't trust the numbers written on 'em.

 

[BoatCop]

A couple of notes if you're thinking of over powering a recreational vessel. (Above certified HP)

1. You can be cited for "Overloading", in State, or Federal Court (if Coast Guard or Federal Agency).
2. If involved in a collision, no matter who's fault, your insurance company will deny all coverage and will not assist in recovering from the "at fault" party.
3. Any person(s), or family of any person(s), injured or killed will sue you and win $$$$$$$$$. Kiss your boat, toys, vehicles, home(s), etc. goodbye.
4. Your purposefully ignoring and being in violation of safe loading standards will automatically be considered as RECKLESS (a legal term) conduct, and as such, if the operation results in any mishap that causes injury or death, the degree of crime goes UP. If an injury is involved, it goes from "just an accident" to Aggravated Assault* (mid level (Class 3 Felony, or Class 2 Felony if victim is <15). If death is involved, it goes from "just an accident" or at worst, Negligent Homicide*, to Manslaughter*, a high level (Class 2) felony.*

Class 3 Felony = 5-15 years in Prison
Class 2 Felony = 7-21 years in Prison

(*Arizona Law terminology, but other states have similar)

For some stupid reason, people are fixated on engine weight and transom strength, when discussing vessel horsepower ratings. Those are just a small part of the overall equation. Engine thrust/torque, vessel center of gravity, steering characteristics, turning radius, general handling, and other factors are all considered when computing the vessel's maximum permitted horsepower.

DON'T DO IT! You might get away with it, and nothing will come of it. But you also might not. Are you willing to bet everything you own?

 

[lbhsbz]

A couple of notes if you're thinking of over powering a recreational vessel. (Above certified HP)

1. You can be cited for "Overloading", in State, or Federal Court (if Coast Guard or Federal Agency).
2. If involved in a collision, no matter who's fault, your insurance company will deny all coverage and will not assist in recovering from the "at fault" party.
3. Any person(s), or family of any person(s), injured or killed will sue you and win $$$$$$$$$. Kiss your boat, toys, vehicles, home(s), etc. goodbye.
4. Your purposefully ignoring and being in violation of safe loading standards will automatically be considered as RECKLESS (a legal term) conduct, and as such, if the operation results in any mishap that causes injury or death, the degree of crime goes UP. If an injury is involved, it goes from "just an accident" to Aggravated Assault* (mid level (Class 3 Felony, or Class 2 Felony if victim is <15). If death is involved, it goes from "just an accident" or at worst, Negligent Homicide*, to Manslaughter*, a high level (Class 2) felony.*

Class 3 Felony = 5-15 years in Prison
Class 2 Felony = 7-21 years in Prison

(*Arizona Law terminology, but other states have similar)

For some stupid reason, people are fixated on engine weight and transom strength, when discussing vessel horsepower ratings. Those are just a small part of the overall equation. Engine thrust/torque, vessel center of gravity, steering characteristics, turning radius, general handling, and other factors are all considered when computing the vessel's maximum permitted horsepower.

DON'T DO IT! You might get away with it, and nothing will come of it. But you also might not. Are you willing to bet everything you own?

Curious if the same applies to stuff with no USCG tag and a pair of merc 1350s in a 38ft boat? Or a TT big inch motor making north of 1500hp in a 18’ flat or squirt boat….is it still criminal or is it an accident?

If not, why not just shitcan the tag and gel over the holes or put a cup holder to hide ‘em and claim there was no tag

 

[HST4ME]

I edited my post after I did a quick search and it seems like your numbers are right on for that manufacturer.

View attachment 1237670

View attachment 1237671

I'd be a little disappointed with those numbers to be honest.

Hm, my boat does 0-20 in like 3 feet.

 

[BoatCop]

Curious if the same applies to stuff with no USCG tag and a pair of merc 1350s in a 38ft boat?

Federal Law and requirements for loading applies only to Outboard Powered, mono-hull vessels less than 20' in length.

HOWEVER: Most manufacturers of vessels 20' and over, and multi-hull (Cats, pontoons, tri-toons, etc,) go through the procedures to certify the capacity limits of their boats, and apply the plates, to deflect liability, and is usually required by their corporate insurers.

It is a violation of Federal Law and many State laws to falsify, remove or alter the manufacturer's capacity plates that the manufacturer affixes to their boats, regardless of whether they are legally required to be applied. Once the plates are applied, it is a violation to remove them, or exceed the capacities displayed on the plates.

I have seen many people who just remove the plates and play dumb. I called these people "defendants".

AZ:
5-344. Overloading

A. No watercraft shall be loaded and operated with passengers or cargo beyond its safe carrying capacity or the limitations on the manufacturer's load capacity plate.

 

[ChrisV]

You shouldn’t overload an f150 but that ain’t stoppin no one.

 

[BoatCop]

There is nothing illegal about doing this. Boat manufactures that are members of the Marine Manufactures Association, set limits on horsepower to their members. Most of the biggest names in boating are members. It should be noted that the boats built for Parker and Havasu, are made by manufacturers that are not members. That’s why they have no horsepower restrictions.

There is no reason why the boat cannot be insured. I just want to quell those thoughts.

Where did you hear about this little piece of horseshit? The Federal Boat Safety Act of 1971 requires capacity plates, sets the requirements of what boats must be certified, and what information is to be displayed on them.

And when a Capacity plate IS affixed, whether the law(s) require them or not, exceeding the limitations of the Capacity Plate is against the law.

 

[C-Ya]

Where did you hear about this little piece of horseshit? The Federal Boat Safety Act of 1971 requires capacity plates, sets the requirements of what boats must be certified, and what information is to be displayed on them.

And when a Capacity plate IS affixed, whether the law(s) require them or not, exceeding the limitations of the Capacity Plate is against the law.

I pretty much disagree with everything you stated. So I guess we are even.

 

[done]

I don't understand how a prop can cavitate at high speeds unless you had it trimmed to the moon. You're saying you saw higher RPMs and fewer MPH wide open with the bigger prop?

Amazon, trimmed down all the way......Cheap stainless prop, you can return and try another. i would bet the tested prop would be the best, I can't seem to find one

 

[done]

Let’s start with entertaining making the boat faster through replacing engine.

The Yamaha 200hp XCA is a 4 cylinder. It’s power band will be in the higher rpm’s. However, it is easier to switch out the same brand of motors, since each brand has their own throttle controls and other accessories.

The most bang would be installing a Mercury 225 6 cylinder. (It does come in a reduced tune 200hp also) What is nice about the Mercury is that it just has a better powerband. It automatically trims itself for best mileage and a few other features. It has great motor access too. They should be close in weight.

There is nothing illegal about doing this. Boat manufactures that are members of the Marine Manufactures Association, set limits on horsepower to their members. Most of the biggest names in boating are members. It should be noted that the boats built for Parker and Havasu, are made by manufacturers that are not members. That’s why they have no horsepower restrictions.

There is no reason why the boat cannot be insured. I just want to quell those thoughts.

Looking at the boat, there could be an issue with the scuppers being lower in the water, but the worst that can happen from that, is that there might be some water occasionally in the back of the boat. But not enough to worry about.

Do not modify your present motor. It is worth the most being stock. Still under warranty ads even move value. How many hours to currently have on the motor?

Also, I just looked again at your boat pic. I would highly consider getting trim tabs. It will give even more ability to properly trim the boat.

Thanks good advice....Motor is inset in the transom creating natural trim tabs. At wide open trim up a little from bottom. The boat gets a little bouncy and gains no
speed. I think the boat set up with the hull extending past the motor kind of fights the idea. This thing for being only 19' rides great in the Havasu slop.

 

[done]

Is the stainless prop new?
If not new have you eliminated the hub being spun ? Slipping at higher rpm is usually sign of a loose hub.

Yes, sending it back to try another tomorrow.

 

[done]

Is the stainless prop new?
If not new have you eliminated the hub being spun ? Slipping at higher rpm is usually sign of a loose hub.

Your right, felt like at high speed the hub spun..Took off pretty good, Higher RPM sounded like a car clutch, slipping

 

[done]

A couple of notes if you're thinking of over powering a recreational vessel. (Above certified HP)

1. You can be cited for "Overloading", in State, or Federal Court (if Coast Guard or Federal Agency).
2. If involved in a collision, no matter who's fault, your insurance company will deny all coverage and will not assist in recovering from the "at fault" party.
3. Any person(s), or family of any person(s), injured or killed will sue you and win $$$$$$$$$. Kiss your boat, toys, vehicles, home(s), etc. goodbye.
4. Your purposefully ignoring and being in violation of safe loading standards will automatically be considered as RECKLESS (a legal term) conduct, and as such, if the operation results in any mishap that causes injury or death, the degree of crime goes UP. If an injury is involved, it goes from "just an accident" to Aggravated Assault* (mid level (Class 3 Felony, or Class 2 Felony if victim is <15). If death is involved, it goes from "just an accident" or at worst, Negligent Homicide*, to Manslaughter*, a high level (Class 2) felony.*

Class 3 Felony = 5-15 years in Prison
Class 2 Felony = 7-21 years in Prison

(*Arizona Law terminology, but other states have similar)

For some stupid reason, people are fixated on engine weight and transom strength, when discussing vessel horsepower ratings. Those are just a small part of the overall equation. Engine thrust/torque, vessel center of gravity, steering characteristics, turning radius, general handling, and other factors are all considered when computing the vessel's maximum permitted horsepower.

DON'T DO IT! You might get away with it, and nothing will come of it. But you also might not. Are you willing to bet everything you own?

Thank you. Sums it up for me. Re-prop, and keep it pinned !

 

[arch stanton]

just wondering how you are measuring your speed standard cheap boat speedos are not the most accurate way to go

 

[BoatCop]

I pretty much disagree with everything you stated. So I guess we are even.

Whether you agree or not is of no consequence. There are a lot of laws I don't agree with.

US Federal Code: 33-CFR-33

Federal Register :: Request Access

www.ecfr.gov

Arizona Law
5-344. Overloading

A. No watercraft shall be loaded and operated with passengers or cargo beyond its safe carrying capacity or the limitations on the manufacturer's load capacity plate.


And since you are in Florida"

Title XXIV VESSELS Chapter 327 VESSEL SAFETY

327.52 Maximum loading and horsepower.— (1) Except for sailboats, canoes, kayaks, and inflatable boats, this section applies to all monohull motorboats less than 20 feet in length that are: manufactured or used primarily for noncommercial use; leased, rented, or chartered to another for the latter’s noncommercial use; or engaged in the carrying of six or fewer passengers for hire. (2) No person shall sell or offer for sale any vessel described in subsection (1) unless said vessel displays the maximum capacity information as prescribed in 33 C.F.R. part 183. This shall not apply to resales, but it is the intent of this section to require dealers and manufacturers to furnish this information upon the original sale. (3) No person shall operate any vessel described in subsection (1) when said vessel exceeds the maximum weight capacity, maximum persons capacity, or maximum horsepower capacity. If no maximum capacity information is displayed, the capacities shall be calculated as provided in 33 C.F.R. part 183, subparts C and D. This subsection shall not preclude the finding of reckless operation under s. 327.33(1) when a vessel is operated in a grossly overloaded or overpowered condition.

 

[done]

just wondering how you are measuring your speed standard cheap boat speedos are not the most accurate way to go

GPS

 

[Desert Whaler]

That T-Top is one of your biggest hurdles to overcome . . . they act like kites with wind drag.

 

[hallett21]

I’d refer to @BoatCop on the laws.

But as far as speed it sounds like you have a setup issue somewhere. Also figure that the boat test was done in the most favorable of conditions.

I would be running a stainless steel prop. And pay attention to not only pitch but diameter. Sometimes the wheel can be too large for the boat to turn.

Blowout at WOT would indicate that the prop is too high out of the water (my guess is over trimmed trying to get to WOT RPM).

If you did put a 200 on that boat I would imagine 50 mph would be very easy to achieve. I’ve seen Trophy (bay liner dual consoles) hit the 40s with an old blackmax 150

 

[OldSchoolBoats]

This thread is so RDP.

Guy buys a 19 foot center console with a 115 HP motor and is upset because it doesn't go fast enough.....

Based on post #3, your numbers seem in line.

Have you tried a different prop?

 

[lbhsbz]

Federal Law and requirements for loading applies only to Outboard Powered, mono-hull vessels less than 20' in length.

HOWEVER: Most manufacturers of vessels 20' and over, and multi-hull (Cats, pontoons, tri-toons, etc,) go through the procedures to certify the capacity limits of their boats, and apply the plates, to deflect liability, and is usually required by their corporate insurers.

It is a violation of Federal Law and many State laws to falsify, remove or alter the manufacturer's capacity plates that the manufacturer affixes to their boats, regardless of whether they are legally required to be applied. Once the plates are applied, it is a violation to remove them, or exceed the capacities displayed on the plates.

I have seen many people who just remove the plates and play dumb. I called these people "defendants".

AZ:
5-344. Overloading

A. No watercraft shall be loaded and operated with passengers or cargo beyond its safe carrying capacity or the limitations on the manufacturer's load capacity plate.

Got it…so (from your other post) it’s a felony if you wanna add a few HP to do 50 mph in your 19.8’ outboard board boat and something happens, but if you wad up a 150mph 2000hp boat that doesn’t need a tag….it’s just an “accident”.

I know you don’t make the rules, but that’s just fucking stupid.

 

[C-Ya]

A couple of notes if you're thinking of over powering a recreational vessel. (Above certified HP)

1. You can be cited for "Overloading", in State, or Federal Court (if Coast Guard or Federal Agency).
2. If involved in a collision, no matter who's fault, your insurance company will deny all coverage and will not assist in recovering from the "at fault" party.
3. Any person(s), or family of any person(s), injured or killed will sue you and win $$$$$$$$$. Kiss your boat, toys, vehicles, home(s), etc. goodbye.
4. Your purposefully ignoring and being in violation of safe loading standards will automatically be considered as RECKLESS (a legal term) conduct, and as such, if the operation results in any mishap that causes injury or death, the degree of crime goes UP. If an injury is involved, it goes from "just an accident" to Aggravated Assault* (mid level (Class 3 Felony, or Class 2 Felony if victim is <15). If death is involved, it goes from "just an accident" or at worst, Negligent Homicide*, to Manslaughter*, a high level (Class 2) felony.*

Class 3 Felony = 5-15 years in Prison
Class 2 Felony = 7-21 years in Prison

(*Arizona Law terminology, but other states have similar)

For some stupid reason, people are fixated on engine weight and transom strength, when discussing vessel horsepower ratings. Those are just a small part of the overall equation. Engine thrust/torque, vessel center of gravity, steering characteristics, turning radius, general handling, and other factors are all considered when computing the vessel's maximum permitted horsepower.

DON'T DO IT! You might get away with it, and nothing will come of it. But you also might not. Are you willing to bet everything you own?

No offense Boatcop…….. But you are making a LOT of legal assumptions. Most are not true.

Let me rephrase………”If you repower your boat you will loose everything you have.” Really?

Nobody is going to kiss anything goodbye.

I see a lot of boating related litigation. The scenario you have painted just does not ring true. Again, no offense, but you are not an attorney. You truly have no idea how and what will happen in court. You are just speculating, but serving it up as fact. Which it is not true.

Also……. What does the very bottom of this capacity plate say? It’s got Coast Guard on top. Do you know why it says National Marine Manufacturers Association on the bottom?

 

[LargeOrangeFont]

This thread is so RDP.

Guy buys a 19 foot center console with a 115 HP motor and is upset because it doesn't go fast enough.....

Based on post #3, your numbers seem in line.

Have you tried a different prop?

It is just arguing to argue

 

[BoatCop]

No offense Boatcop…….. But you are making a LOT of legal assumptions. Most are not true.

Let me rephrase………”If you repower your boat you will loose everything you have.” Really?

Nobody is going to kiss anything goodbye.

I see a lot of boating related litigation. The scenario you have painted just does not ring true. Again, no offense, but you are not an attorney. You truly have no idea how and what will happen in court. You are just speculating, but serving it up as fact. Which it is not true.

Also……. What does the very bottom of this capacity plate say? It’s got Coast Guard on top. Do you know why it says National Marine Manufacturers Association on the bottom?

First, I DO know what can happen in court, as I have been involved in numerous multi-million dollar civil court cases, (as well as criminal prosecutions) as investigating officer, witness, or expert. I was certified in CA, AZ and Federal Courts as expert witness regarding State and Federal Boating Laws, Navigation Rules, and marine casualties/collisions.

Second, The Coast Guard sets the regulations for minimum requirements for recreational vessel construction, standards, equipment and loading. The NMMA certifies that a particular vessel (or class of vessels) meets the Federal Standards. It's the same process used for meeting the requirements for Coast Guard Approval of various safety equipment, such as life jackets, fire extinguishers, electrical wiring, fuel hoses, and such. The Coast Guard makes the regulations, but other entities, such as Underwriter's Laboratory, tests the equipment to ensure that they meet Coast Guard Standards. The Coast Guard then reviews the technical data and lab results to issue the Approval.

I was in my position, as a Marine Patrol Officer, Boating Safety Officer, USCG Boarding Officer, educator/trainer, Accident Investigations/reconstruction and supervisor for all the above, for over 40 years. It's not like I just pull this stuff out of a hat.

 

[Desert Whaler]

I'd be curious as to why a 19' center console is only rated to 115 HP. I would expect at least 150 HP.
I know there is a 'formula' used in designating the rating . . . but I am unfamiliar with the variables used to achieve it.

By way of comparison . . .
Our 1985 18 Foot Boston Whaler Outrage CC has a 150 HP rating on it. The hull weight is only 1200 Lbs. So go figure.
So perhaps the 'Manufacturer' themselves don't want a heavier motor on their boat, for whatever reason(s). Might be worth looking into.

IMO if you decide to 're-power, I would take a closer look at the Yamaha SHO (or non SHO with the lower gear ratio) inline 4 cylinder 150 & 175 HP motors. ( I believe they share the same block)
You'd be adding around 95 pounds for a possible 60 additional HP.

And forget about the 200's . . . just too much weight for the transom & you'll lose all the ride quality that your are currently enjoying now in the rougher stuff.

 

[C-Ya]

First, I DO know what can happen in court, as I have been involved in numerous multi-million dollar civil court cases, (as well as criminal prosecutions) as investigating officer, witness, or expert. I was certified in CA, AZ and Federal Courts as expert witness regarding State and Federal Boating Laws, Navigation Rules, and marine casualties/collisions.

Second, The Coast Guard sets the regulations for minimum requirements for recreational vessel construction, standards, equipment and loading. The NMMA certifies that a particular vessel (or class of vessels) meets the Federal Standards. It's the same process used for meeting the requirements for Coast Guard Approval of various safety equipment, such as life jackets, fire extinguishers, electrical wiring, fuel hoses, and such. The Coast Guard makes the regulations, but other entities, such as Underwriter's Laboratory, tests the equipment to ensure that they meet Coast Guard Standards. The Coast Guard then reviews the technical data and lab results to issue the Approval.

I was in my position, as a Marine Patrol Officer, Boating Safety Officer, USCG Boarding Officer, educator/trainer, Accident Investigations/reconstruction and supervisor for all the above, for over 40 years. It's not like I just pull this stuff out of a hat.

I agree that you are knowledgeable and I have always liked you personally. I think you are a great guy!

I really don’t want to talk laws and consequences.

The OP asked a question. It just so happens that where I live, adding a bigger outboard than the capacity plate is quite common. Many threads on this on East Coast forums. Here, everything you mentioned has been discussed and then discarded. It is one of those things that just isn’t enforced in Florida. Going from a 115hp to 200hp is nothing, compared to others. I see hundreds of boats that have more outboard power than their capacity plates. The insurance company still insures them and law enforcement does not enforce this. Just saying

 

[rivermobster]

I bought this as a second boat for Havasu....19 ' Hybrid center console, 115 yamaha sho Outboard. After break in trying different props, 4500 RPM = 23 MPH trying to stay on plane.
6400 RPM Pinned = 36 MPH . Tag on the boat says Max HP 115, This boat would be great if it had more power, I would be happy with a cruising speed of around 45 or so . Is there
any way i could maybe run a Yamaha 200 sho. The weight diff is only about 150 lbs between the two. I love the size of this boat because i can handle it myself, Rides better than your
average runabout. Also i did not want to spend the dollars for a twin, bigger boat. Any Idea what to do ? View attachment 1237664

Looking at this (on the Yamaha website), I'd say you're running way too small of a prop.

Switch to a 4 blade and go up a bit in pitch. It will be slower to get on plane, but you'll get closer to the top speed your looking for.

Get the max rpm you're getting closer to 5300.

 

[rivermobster]

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