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Old 10 December 2010, 00:43   #1
Country: UK - England
Town: Southend on Sea
Boat name: Ego
Make: Avon
Length: 4m +
Engine: Mariner 50hp
Join Date: Nov 2010
Posts: 12
Is size important!!!!

Hi Guys,

Posted a little while ago re the leaky tubes on a 4m Narwhal I managed to buy (without doing any research). After much pondering the boat either needs a retube, or Sherlock Holmes to find the bloody leak.

The admirable Paul Tilley has given me a good quote for the tubes, but I am wondering, if I would be better keeping the trailer/controls/old but good Mercury 40hp Thunderbolt and just finding another boat to put it with.

I spotted this on B & O and wondered (knowing that the trailer will just about take it) if this is the direction to go.

The boat will mostly be used on the Thames Estuary so questions that come to mind are:

Are 40 horses enough? (at least initially) Will it plane, what sort out speed could I expect?
What are the advantage/disadvantages of the extra 1.4 metres over something like an SR4
How much heavier/hassle to launch is the larger boat.

Having learnt the lesson with the Narwhal (do you research 1st) all opinions are welcome, so lets hear them

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Old 10 December 2010, 02:41   #2
chewy's Avatar
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
An SR4 will handle better than Narwhal 4m, my mate has a 4.5m Narwhal and my SR4 gives a smoother ride.
The SR5.4 will be like chalk and cheese,the 40hp will push it along but most on here use 90hp 2 strokes.

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Old 10 December 2010, 02:57   #3
Country: UK - England
Town: Scillies
Boat name: Freedom
Make: Searider
Length: 5m +
Engine: Yam 2st 90
Join Date: Jan 2007
Posts: 335
40hp is way underpowered for a 5.4. 60 at a minimum and that's what I got rid of to put the 90 on as if you had more than a couple of people on you started feeling it very quickly (or should that be slowly).

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Old 10 December 2010, 02:58   #4
Channel Ribs's Avatar
Country: UK - Channel Islands
Town: Alderney
Length: no boat
Join Date: Sep 2006
Posts: 3,047
I think he is asking a lot of money for a dinged hull with leaky tubes.

Your 40HP will do fine, but it wont be long before your looking for something bigger.
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Old 10 December 2010, 03:19   #5
Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
Join Date: Dec 2006
Posts: 4,015
"one chamberr leaks air but very slowley there are a few patches that i put on so dont look great but do the job"

Sounds like frying pan into the fire. If you can stretch your budget then the 5.4 that DM is selling on here will be a peach however it is a lot more money. Also you will need at least a 60 to make it any fun to helm.
Chris Stevens

Born fiddler
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Old 10 December 2010, 05:25   #6
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,650
If it's an 5.4, I once used a twin 30 setup with one engine dead. It worked, but as said above, not spectacularly.

Having said that, if you have one 40, all you need is the ability to live with the lethargy until you find a twin for it and you have a variation on what Kev had before he sold his.

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