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Old 22 June 2005, 20:06   #1
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Country: Cyprus
Town: ayia napa
Boat name: pantemonium
Make: novamarine
Length: 7m +
Engine: honda 225
Join Date: May 2003
Posts: 42
single or twin on 7m rib?

what would you install on 7m rib ? single 200hp four stroke or twin 115 fourstroke?
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Old 22 June 2005, 21:26   #2
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Country: UK - England
Town: Reading
Make: Lodestar
Length: under 3m
Engine: Mercury 5hp
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Single, unless you need the safety that a twin installation offers.

Lots of information if you do a search.
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Old 23 June 2005, 06:48   #3
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Country: UK - England
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Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
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Twin........
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Old 23 June 2005, 07:20   #4
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Country: Sweden
Town: Stockholm
Boat name: Osprey & Ring
Make: Osprey & Ring
Length: 9m +
Engine: Plenty
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Single for speed.
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Old 23 June 2005, 08:06   #5
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Country: Belgium
Make: Osprey
Length: 7m +
Engine: 250 HP E-Tec
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Single for less weight!
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Old 23 June 2005, 09:53   #6
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Country: UK - Scotland
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Make: Redbay 11m Cabin
Length: 10m +
Engine: 2 x Yamaha422Sti 275
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Posts: 549
Twin

With independent batteries and fuel tanks.....if you need one take two
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Old 23 June 2005, 10:13   #7
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Country: UK - England
Town: Southampton
Boat name: Intrepid
Make: Tornado
Length: 7m +
Engine: Twin 150 Yamaha HPDI
MMSI: 235066402
Join Date: Mar 2005
Posts: 1,284
I have twin yamaha 4 stroke 115's on the back of my 7.5 tornado.. altho its a lot of horse power I only get about 40-42 knots... so if its speed you are after, I'd say go with a single engine as other 7 meter ish rib get better acceleration/top speed than mine - i.e Richard's Blue ICE and Rouge Waves Scorpian.

However if its safety you want, two engines is very nice, I have two completely seperate systems - 2 fuel tanks, 2 batteries, 2 fuel filters, 2 ignitions... so if a failure was to happen (like when I had water in one of my fuel tanks and the engine wouldnt start) you can still get home safely without having to call the coast guard etc.
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Old 23 June 2005, 12:17   #8
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Country: UK - England
Boat name: Little Wing
Make: Searider 5.4
Length: 5m +
Engine: Tohatsu 90
Join Date: Aug 2002
Posts: 1,002
Twins......but I'd go two stroke for the power snap.

DM
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Old 23 June 2005, 12:29   #9
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Country: UK - England
Town: Southampton
Boat name: Intrepid
Make: Tornado
Length: 7m +
Engine: Twin 150 Yamaha HPDI
MMSI: 235066402
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Posts: 1,284
twin 175 optimaxes... mmmmm
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Old 23 June 2005, 12:41   #10
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Country: UK - England
Town: Brittany/Portsmouth
Boat name: Merlin
Make: Solent 6.5
Length: 6m +
Engine: 200
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Quote:
Originally Posted by benc
I have twin yamaha 4 stroke 115's on the back of my 7.5 tornado.. .
looked good on the medina last night!

Paul
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