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Old 30 December 2003, 16:38   #1
Country: UK - Scotland
Join Date: Dec 2003
Posts: 17
my first rib (searider)


just bought my first rib which i pick up on saturday. its a 4m searider and in good nick. the hull no. is 300 and something, has any one got any idea how old this will be. also what is the elephant trunk thing, some kind of self bailer?

bought the rib with no engine so i need a 50, thing is i have a 40 jonson on my shetland cadet. if i put this on the rib temporarily what kind of top end can i expect. there is a guy on boats and outboards claiming 35kn on a 40hp, but i think this is pie in the sky, what do you think?



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Old 30 December 2003, 16:46   #2
Country: Sweden
Town: Stockholm
Boat name: Osprey & Ring
Make: Osprey & Ring
Length: 9m +
Engine: Plenty
Join Date: Mar 2003
Posts: 860
Attache a pic when you recive boat, you are right about the elephant trunk it`s a self bailer but it`s only working when you drive the boat.
Our boats in Sweden are always in the water so we need a electric bilgepump also, otherwise boat is full of water after a couple of days in this rainy country (not that bad during the summers)
Good luck with boat.

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Old 30 December 2003, 17:14   #3
Country: UK - Scotland
Join Date: Dec 2003
Posts: 17
thanks petrov, will do
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Old 31 December 2003, 02:59   #4
Country: UK - Wales
Town: Pwllheli-North Wales
Boat name: Delta 1
Make: Delta
Length: 6m +
Engine: Mariner 90hp Optimax
Join Date: Mar 2001
Posts: 2,367

A 40hp will be great, phil Davies off the forum as a 30hp honda on the back of his. It goes great.
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Old 31 December 2003, 03:05   #5
Country: UK - Wales
Town: Cardiff
Make: Humber Destroyer 5.5
Length: 5m +
Engine: 90hp OB
Join Date: Apr 2002
Posts: 483

The avon spec for a SR4M state a usefull hp of 25 - 40 with a max of 50.

I have a 55hp on my 5.2m (not a searider though) and it tops out at around 32 knots 1 up but full of fuel. So I would have thought a 40 on a 4 metre should easily get you to around the 30 knot mark - there are a few 4m Searider owners on so they they will probably answer.

Do you know if your boat has a flooding hull ? as you will need a bit of oomph (techy term) to get it up on the plane and empty the water if it is flooding - but I would imagine a 40 would be up for it.
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Old 31 December 2003, 06:31   #6
Country: UK - Scotland
Join Date: Dec 2003
Posts: 17
yeah, its got a flooding hull, but that could be changed easily enough in a couple of hours. From reading back posts it seems some people like it to flood and some like to block it. For my purposes stationary/low speed stability will not be all that important.

if the hull is blocked off is there not the danger of water finding its way in, but not being able to get back out, leading to a constantly heavy boat?
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Old 31 December 2003, 07:47   #7
Country: UK - Scotland
Town: Port Logan
Boat name: Red Fox
Make: Zodiac Pro 500
Length: 4m +
Engine: Yamaha 70hp
MMSI: 232004329
Join Date: Aug 2002
Posts: 308
I get over 30mph according to the dial on the console and up to 35/38mph when conditions are right and have a 40 4stroke on a 4.2m zodiac. The punch on lift off should be enough to drain the flooded hull. Get the 40 on and give it a go before spending .
What's the conversion from mph to knotts again??
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Old 31 December 2003, 07:55   #8
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,851
Divide by 1.15.
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Old 01 January 2004, 08:04   #9
Country: UK - England
Town: south shields
Boat name: jessiesue
Make: avon searider
Length: 4m
Engine: 40hp mariner pull start l/s
Join Date: Nov 2003
Posts: 38
happy new year everyone,i have a 4m searider with a mariner 40 l/s i have no idea what the top speed is as i don't have a speedo, but i have just bought a gps so the next time i am out i should be able to tell, all i will say is that your boat with a 40 on the back is fast enough for any body. it will give an excellent ride with more than enough in reserve.

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Old 04 January 2004, 19:05   #10
Country: UK - Scotland
Join Date: Dec 2003
Posts: 17
got a loan of an old 30 mariner tiller steer. got 28knt (gps) quite scary with a tiller steer though. much faster than i expected.

in original post i said 35 kn with a 40hp was "pie in the sky" but now i may stand corrected.

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