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Old 06 July 2008, 06:04   #11
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Country: UK - England
Town: NE
Boat name: RedGazelle
Make: Gemini GRX420 SIB
Length: 4m +
Engine: Mariner 40 2s
Join Date: Nov 2004
Posts: 105
Adam
I have a Gemini GRX 420 SIB with a 40hp - no problems wakeboarding behind that with 3 adults onboard. I Imagine the Ceasar Surfcat would perform the same, and maybe the Zodiac Futura Mk II previosly described.

I would anticipate you will have problems planing with 3 adults whilst towing if you choose a SIB that hasn't a catamaran hull or 'speed tubes'.

Hope this helps,

Ed
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Old 06 July 2008, 07:51   #12
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Country: UK - England
Town: NE
Boat name: RedGazelle
Make: Gemini GRX420 SIB
Length: 4m +
Engine: Mariner 40 2s
Join Date: Nov 2004
Posts: 105
Towing behind the Gemini 420. Using a surfboard here, practising for tow-in to waves, but wakeboard works too.
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Old 06 July 2008, 22:51   #13
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Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
Quote:
Originally Posted by ian parkes View Post
depends on size you need for the size of family . Your budget would get you a new honda or quicksilver and engine up to 4m and 20- 25hp . I don't think a sib that size will tow a wakeboard or skier easily .
Also depends on how you intend to transport it , a 3.8 air and 25hp 2 stroke are about as much as you can carry and fold down etc with ease and it would fill a large estate car
Most bigger sibs end up on a trailer and then you had just as well buy a solid hull boat
have a search in the new sib section there are lots of similar posts to yours and you can see what people eneded up with .

I had a 3.8 honda air floor with a 20hp honda engine new for about 3k that was certainly one of the best lightwieght sibs I have seen ,
Even with a small SIB and motor that can be fit into the back of a car, it is worthwhile to have a trailer for it - provided you have the space to keep a trailer. With my 11 foot zodiac, I would always set up it up and take it down at the launch site with each use. Set up would usually take about 20-25 minutes (with a foot pump), takedown about 10-12 minutes. In retrospect (now that I have a trailer) I would have used that boat much more frequently if I had it already set up and on a trailer. Nevertheless, having the ability to transport and launch it without a trailer made it much more versatile.

There are both advantages and disadvantages of larger SIBs (in the 4.2 to 5.3 meter range) compared to RIBs of the same length. The SIBs will be considerably lighter in weight and transport/launching/landing can still be done without the use of a trailer (if you have a pickup truck), but it is definitely not convenient do so. In the event that you might wish to launch from a location where a trailer launch is impossible, you still have this option with a SIB, whereas you don't with a RIB. Also, the SIB will have a much shallower draft than a RIB, allowing it to go through shallow creeks that would hang up a rigid hull.

A large catamaran hulled SIB will handle easily and comfortably at speed in choppy conditions that would toss you right out of a a v-keeled SIB. While it won't cut through 3 foot+ waves in the way that a deep V-hulled RIB will, a cat-hulled SIB will still provide a stable and remarkably dry ride - but with more up and down movement (with reasonably soft landings).
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Old 07 July 2008, 05:51   #14
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Country: UK - England
Town: Buckingham
Make: Ribcraft 4.8
Length: 4m +
Engine: Mariner 75
Join Date: Feb 2007
Posts: 352
We waterski with 2 or 3 adults and a couple of children on board behind a Zodiac Futura 4.2 with a Yamaha 50hp.

I originally wanted the flexibility of being able to deflate the SIB and (just about) get it in the back of a Landrover - nice idea in theory, but it has just stayed on the trailer because it's so easy to launch & recover !

The Gemini's are fantastic and they rarely seem to appear secondhand (bigger speed tubes than the Futura). Another one to consider would be a Zapcat ...
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Old 07 July 2008, 09:38   #15
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Country: UK - England
Town: cornwall
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Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
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there still doesn't seem to be a uk dealer for the gemini , which is a shame as it seems to be a lot of boat and the bonus of hypalon rather than pvc .
Does anyone have any idea how much they cost new .
The surfcat is quite an expensive boat compred to other pvc sibs but i guess you are paying for the design and performance
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Old 07 July 2008, 13:01   #16
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Country: UK - England
Town: NE
Boat name: RedGazelle
Make: Gemini GRX420 SIB
Length: 4m +
Engine: Mariner 40 2s
Join Date: Nov 2004
Posts: 105
Buying a Gemini Boat in UK

Quote:
Originally Posted by ian parkes View Post
there still doesn't seem to be a uk dealer for the gemini , which is a shame as it seems to be a lot of boat and the bonus of hypalon rather than pvc .
Does anyone have any idea how much they cost new .
The surfcat is quite an expensive boat compred to other pvc sibs but i guess you are paying for the design and performance
It may be worth trying Paul Lemmer at Ribs Ltd. He certainly is a fan of the gemini boats, I recall speaking to him a few years back and hearing how the Gemini GRX were some of the most fun boats he had driven.

His website says that he is an agent for gemini.

http://www.ribsltd.co.uk/sales.html
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Old 07 July 2008, 18:03   #17
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Country: UK - N Ireland
Town: Bangor,Co Down
Make: Gemini/ Avon
Length: 4m +
Join Date: Jul 2003
Posts: 166
I bought a military spec gemini earlier this year from JBT marine for 1k. They had a batch of them. I got delivered this week a short shaft 50hp twostroke carbed Tohatsu manual tiller from Extreme Marine for 2250. I think they have one left. I'm going to order an indespension merit 1 inflatable boat trailer this week depending if the Gemini is 4.2 of 4.5m. so there'll be not much change out of 780. There's a Gemini military for sale on B&O for about 800.
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