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Old 20 April 2012, 11:19   #11
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Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
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Quote:
Originally Posted by Markyboyo View Post
I'm not sure you can even get a new 115 under 170kg, especially with the XL Transom I have.
Aye, and that's half the reason I now have a Clamshell..... 110Kg rated transom, 85Kg engine. I've even got capacity for an aux! (which, incidentally, is a 13Kg (fuelled) 4Hp of 1974 vintage. How heavy is a 4Hp these days?) My entire setup clocks in at 420Kg fuelled.


Another Q that I should have asked before - how old are the boats you are talking about? I'll take my transom as an example - 110Kg rated. Not much I can actually hang on that at 60Hp, even in the 2- stroke arena. But then I look at all the old broures of the late 70s / early 80s. Most engines of that size were 2 cyl premix jobs, and power trim (another few Kg) was a very expensive optional extra if it was even offered at that size. 110Kg capacity was well more than enough. Not much later after my hull was built everything was 3 cyl and had autolube. My hull was redesigned slightly & renamed the Attaque. Transom now rated to 130 odd KG to handle all the extra weight....

Now, drag that observation into 2012. Sometime about 10 years ago a similar problem was had when these "lardy 4- strokes" appeared - do a search on here for 4 strokes & searider SR4s.
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Old 20 April 2012, 12:09   #12
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Country: UK - England
Town: Truro-Cornwall & Brazil
Boat name: Bananas in Blue
Make: Humber Destroyer 5.5
Length: 5m +
Engine: E-Tec 115
Join Date: Jun 2007
Posts: 385
My hull is a 2008 and I think Desmonds's is probably newer or about the same by the looks of it. I have a nice light aux too, 3.3 Evinrude of 1998 vintage which weighs about the same as yours but I keep it in the boat rather then hanging it out back all the time. Not really powerful enough but does the job and I don't want anything heavier.

I used to have a 1986 Orkney fishing boat with a Jap built Mariner 40 twin on the back. I think that engine weighed about 65 kgs, I had a bit of a shock to see the weights of newer 40's when I replaced it in 2006. Went for a Tohatsu 50 as it was as light as I could get new but was still over weight for the transom. That was a 20 year old boat though.
It just seems silly that Humber's current engine weight and HP ratings for some models can only be achieved by fitting a 25 year old engine but who fits an engine that old to a brand new rib fresh out the factory?
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Old 20 April 2012, 14:17   #13
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Country: UK - England
Town: Blackpool
Boat name: Indigo
Make: Humber
Length: 5m +
Engine: Etec 60 Hp
Join Date: Jun 2011
Posts: 57
My Destroyer was built late 2010 I picked it up early 2011. It was a turnkey package from Humber and although I am on here asking about more power / transom weights etc I have been broadly happy with the package (give or take a few fixture and fitting repairs). I'd initially asked for 30Kts so it arrived with a 17 pitch prop which struggled to plane / stay on the plane at low revs, didn't get to the recommended WOT revs but hit 31Kts. I replaced the prop with a 15 pitch and this transformed the boat so it planes and holds great now and is bang on the 5750rpm WOT. The down side to this was a reduction in top end to about 29Kts. The reason that I think the boat will take 90HP is you can hurl it around (not when Mrs Desmond is on board though!) even is some fairly choppy conditions and it feels sooo stable. I think I might load up the transom with another 35Kg to see if it upsets the balance before I take the plunge.
Oh by the way my Etec 60HP is 109Kgs supposedly.
The One Design is a cracking boat for speed and it can catch some big air but as we launch from Knott End over the side of the slipway he does get use out of his bailing bucket. The day of that pic was a great flat calm day.

Des
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Old 20 April 2012, 14:21   #14
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Country: UK - England
Town: Blackpool
Boat name: Indigo
Make: Humber
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Engine: Etec 60 Hp
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Markyboyo If we're ever down your way I'll give you a shout. Always up for a bit of exploring. We tend to go the other way in the summer onto the Mull of Galloway but hope to get further up the west coast over the next couple of years.

Des
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Old 20 April 2012, 15:09   #15
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Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
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I would imagine some of these power and weight ratings are a legacy of old designs, even though engine types and weights have changed since. I doubt manufacturers are going to have old designs reassessed just for the sake of meeting the demands of modern outboards and a handful of people that actually bother to comply with the small print. Don't get me wrong, I think it is very important not to breach the recommendations as you could land youself in trouble if you have a problem and need to claim off insurance or prove you weren't negligent. If the hull design and loadings were designed and approved back in the day, then there would be a reasonable cost to get it updated. I'm sure a lot of it was just sensible guess work at the time, but as that is what was written into the type approval (for want of a better phrase) that is what you will have to live with. Particularly as RCD now comes into it.
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Old 20 April 2012, 15:44   #16
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Country: UK - England
Town: Blackpool
Boat name: Indigo
Make: Humber
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Sorry not familiar with RCD?
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Old 20 April 2012, 16:44   #17
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Boat name: La Frette
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Recreational Craft Directive. You will have heard of the category A, B or C rating dependant upon what sea types and how far offshore a craft is designed for under EU rulings. Came in in 1998 I think. Cat B or over requires drop testing of a hull which I believe results in destruction and is therefore something smaller companies are reluctant to do too often.
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Old 20 April 2012, 17:06   #18
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Country: UK - England
Town: Blackpool
Boat name: Indigo
Make: Humber
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Arrrh.......all becomes clear. Great forum for picking up stuff. Big toobs solid boat for a 5m (maybe)
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Old 20 April 2012, 23:46   #19
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Country: UK - England
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Boat name: Cameo
Make: Redbay Stormforce
Length: 6m +
Engine: 200hp Suzuki
MMSI: 235067011
Join Date: Aug 2005
Posts: 102
The ribcrafts did quite well out of this:

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Old 21 April 2012, 05:16   #20
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Cheers horacebat. I have seen something like this before as part of the Zodiac sales speel when we bought our previous boat (which is for sale incidentally see Ribs For Sale section). I seem to remember they whacked the boat against the quayside whilst it was dangling from a crane. We shortlisted the Ribcrafts and the Humbers for our present boat and it came down to geography in the end with Humber being closer to us. I know the Ribcrafts are considered to be some of the best small Hulls though.
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