horsepower rating
Submitted by Cruise Control on Sun, 2013-03-03 09:37
I have a question relating to horsepower rating on a hull.
My hull is currently rated to 270hp - what criteria drives this rating ? is it actually the rated horsepower of the engine or is it the weight of a typical engine rated at that horsepower ?
What options exist if I want to exceed the hp rating without risking any insurance fallout
cheers
Starbug
Posts: 563
Date Joined: 27/08/09
Force exerted on the transom
Force exerted on the transom
till
Posts: 9358
Date Joined: 21/02/08
Waterline length x beam of
Waterline length x beam of boat as well.
dodgy
Posts: 4580
Date Joined: 01/02/10
This will give you a rough
This will give you a rough idea how it is calculated.
Sometimes a marine engineer will re plate your boat with a higher rating for a fee.
http://continuouswave.com/whaler/reference/ratedHP.html
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
nico
Posts: 226
Date Joined: 17/08/10
HP Rating
Interesting if i worked that theory on my custom 23 ft i should only have 287 hp not 500 hp.One hulls hp is not the same as another Shape, Materials used,hull weights all play factors this is factored in by the builder and the designer if you exceed plate id horse power you void insurance go to the Boat builder or a marine engineer.
In Mocean
spinksy
Posts: 266
Date Joined: 06/10/10
Yeah but
A 270hp fourstroke would weigh a lot more than a 270 2 stroke. Pretty sure it is weight and it wouldbe a 270 two stroke and whatever that weighs you could get the same weight fourstroke
till
Posts: 9358
Date Joined: 21/02/08
Not really. Max hp and
Not really.
Max hp and engine weight are different issues.
The hp is totally irrelevant to max buoyancy rating and the OTM induced by the weight of the engine.
nico
Posts: 226
Date Joined: 17/08/10
Buoyancy is only really taken
Buoyancy is only really taken in to account if the hull is to go in to survey for stability there are no major guidelines to boat building as yet hence why there are so many boats not up to quality standards.The only major one now is foam filling up to 5 metres from memory.
Cruise Control what brand,model, age hull are we refering to?
In Mocean
till
Posts: 9358
Date Joined: 21/02/08
Whilst they don't examine the
Whilst they don't examine the stability for rec boats, you can see it in lloyds of london reports for boats sold as rec boats.
The max weight is deducted from the max payload covered by the boats buoyancy rating, be that basic or level.
spinksy
Posts: 266
Date Joined: 06/10/10
Hmmm
Ive got a haines hunter rated to 225hp, I rang haines hunter and they said thats 225 in a 2stroke and the same weight in a fourstroke is 175hp.
Cruise Control
Posts: 973
Date Joined: 03/11/10
Nico685 Cruise Craft Outsider
Nico
685 Cruise Craft Outsider - twin 115 Yamahas 4 stroke, like to upgrade to 2 x 140 Suzuki 4 strokes
cheers
Rob H
Posts: 5807
Date Joined: 18/01/12
CC685
Its both weight and power. My Builders plate says 390kg which should cover the twin DF140 though also 270hp.
If I was you Id ring or email Kevin Nichols at Cruisecraft, you will find (if you havent already) that he is the most approachable big boss and freely gives of his time to help CC owners.
His personal 685 Explorer (identical hull to Outsider) has a single 300hp Yam, tested in Trailerboat mag last year.
He will be able to tell you if it could be done without insurance issues.
PM sent for some other info
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
dodgy
Posts: 4580
Date Joined: 01/02/10
For that rig I think you
For that rig I think you will have no problems. Give cruise craft a call and talk to them. Fair chance they will just send you a plate off the current hull that is rated to 300hp.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
Daaron Holmes
Posts: 58
Date Joined: 25/04/10
Your yam for strokes
Are you trading or selling the yamahas? How many hrs?
cheers CC
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