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Old 24 January 2008, 06:57   #41
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Originally Posted by Nos4r2 View Post

Unless of course you were really lucky and managed to pick something up with a Vario or a Mercruiser 1.7 diesel.

Our Mercruiser 1.7 litre 120hp diesel uses around 10 - 12 litres per hour, and with red diesel still only around 50p a litre that is around 6.00 an hour. Even allowing for the fact that red diesel won't be here forever, it seems it will still be cheaper than road diesel. If you fill it up at a garage it will still only be 12.00 an hour, or if you never take your foot off the throttle and run it flat out from the moment it hits the water it would never go over 25 litres per hour - oh yes and get you a fine from the harbourmaster!
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When a boat looks that good who needs tubes!!!
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Old 24 January 2008, 06:58   #42
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boats at around the 15k mark.
That's a LOT of secondhand boat...... I can't believe there isn't a secondhand diesel drinking cabin boat out there for under 15K!

But back to the O/B cabin cruisers I greabbed this as a quick example (no time to do a full web trawl)

http://www.shetlandboats.co.uk/dayboat.htm They have a 4.5m Takes a 50, and a bigger one takes 80. Remember 4.5m hard boat will give a LOT more space than a similar length RIB 'coz you don't have toobs... You wll ned to buy some fenders tho'!!
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Old 24 January 2008, 07:02   #43
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At last - a calculation I can put to fuel consumption. Thanks Nos4r2.

So, if I had a 90hp and petrol is about 4.85 a gallon, does that mean I'd be looking at (9 x 4.85) 43.65 an hour to run?

And does the same calculation apply to 2-stroke?

Helps to focus the mind...and the budget!!
It seems to apply to pretty much anything petrol at wide open throttle-which you won't use much at a guess. Incidentally, it's in US gallons per hour so work it out as 10% of HPx4=approx litres per hour.

Where you make your savings will be at cruising rpm.
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Old 24 January 2008, 07:16   #44
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That's a LOT of secondhand boat...... I can't believe there isn't a secondhand diesel drinking cabin boat out there for under 15K!
Sorry - 15k was most definitely upper limit for a new boat, not second-hand. Maybe when the kids leave home...
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Old 24 January 2008, 07:18   #45
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Whole new can of worms

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Originally Posted by Nos4r2 View Post
Where you make your savings will be at cruising rpm.
Any ideas what I should allow for cruising speed calculation, Nos4r2?

Personally I like a bit of WOT, but I suspect the family may not be quite as keen!!
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Old 24 January 2008, 07:24   #46
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That's a LOT of secondhand boat...... I can't believe there isn't a secondhand diesel drinking cabin boat out there for under 15K!
I did a quick trawl on B&O and found nothing diesel and small enough to regularly trailer that wasn't horrendously underpowered-apart from this bowrider:- http://www.boatsandoutboards.co.uk/view/F168730 which may be worth a look!
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But back to the O/B cabin cruisers I greabbed this as a quick example (no time to do a full web trawl)

http://www.shetlandboats.co.uk/dayboat.htm They have a 4.5m Takes a 50, and a bigger one takes 80. Remember 4.5m hard boat will give a LOT more space than a similar length RIB 'coz you don't have toobs... You wll ned to buy some fenders tho'!!

I think that may be the answer.
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Old 24 January 2008, 10:07   #47
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Lordy, would you rather have a cabin sports boat over something like an Avon 5.6m or 6.2m? A cabin won't be useable when a boat is moving so would tend to be used to store lunch boxes and bags etc. The Avons are excellent quality and the blue/white looks quite smart to keep the Mrs happy. A good set of seats would give all the storeage your likely to need. When I drove Tonys 5.6m Adventurer I was impressed by the feeling of being in rather than on the rib so kids feel safe too. There are several on boats and Outboards so either modern injection 2 stroke or 4 stroke available which will be economical.

http://www.boatsandoutboards.co.uk/view/F160865

The alternative is to have Cookee build a rib for you so you choose the colours, now that would be really special and superb quality

http://rib.net/forum/showthread.php?t=22443

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Old 24 January 2008, 11:24   #48
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Lateral thinking a little here... But have you considered an Italian RIB Lordy? That way, you could achieve the sea keeping benefits that a RIB provides with some of the 'style' that appeals to Mrs Lordy. Many Italian RIB's have quite shallow V's (intended for the Italian lakes) but there are those with a deep V. The popular Predator RIB's are very capable, well made, beautifully finished, and ideal as a family cruiser (Hypalon tubes, large fuel tanks, loads of storage space, swim platform, huge sundeck etc.). See http://www.mrl-uk.com/home.htm

However... Selva have recently updated their RIB range (because their old models were awful) and their Evolution line are exactly the same boat as the Predator (i.e. same model, built by the same company - Ital Boats in Italy - but badged Selva). And because Yamaha have a big stake in Selva, the Selva 4 stroke outboards are actually Yamaha outboards (about as good as you can get!) badged as Selva. See http://www.selvamarine.co.uk/infopage.asp?infoid=175 . The Selva packages are VERY competitive. I was looking at the D600 last summer: 6m boat, 100hp outboard, Bramber trailer, all for 18.5k from Lymington Marine Sales. The smaller models must be well within your budget.

...Well, just an idea!
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Old 24 January 2008, 11:34   #49
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Lordy, would you rather have a cabin sports boat over something like an Avon 5.6m or 6.2m? A cabin won't be useable when a boat is moving so would tend to be used to store lunch boxes and bags etc. The Avons are excellent quality and the blue/white looks quite smart to keep the Mrs happy. A good set of seats would give all the storeage your likely to need. When I drove Tonys 5.6m Adventurer I was impressed by the feeling of being in rather than on the rib so kids feel safe too. There are several on boats and Outboards so either modern injection 2 stroke or 4 stroke available which will be economical.

http://www.boatsandoutboards.co.uk/view/F160865

The alternative is to have Cookee build a rib for you so you choose the colours, now that would be really special and superb quality

http://rib.net/forum/showthread.php?t=22443

Pete
Ha - LOL - have you been talking to Cookee then?! I have, and he has shown me a fantastic boat, though sadly not really a family outing type boat. Now, if it was just me and the lads!!!

Don't necessarily need a cabin but Ian (Parkes) has pointed me at an excellent fibreglass dayboat that does have a little cuddy for storage and even a little portaloo. Very popular with the ladies in the family. That Avon also looks nice though, but have you seen the Zodiac Medline range - great seating arrangement for a family. Saw one at Excel - very nice!
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Old 24 January 2008, 12:58   #50
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Any ideas what I should allow for cruising speed calculation, Nos4r2?

Personally I like a bit of WOT, but I suspect the family may not be quite as keen!!

Nope! Less than WOT

There's no hard and fast rule for fuel consumption at cruising speed (though it seems a lot of ribs will do a 1 mile/litre at cruising speed). Best to fill up then just fill up every time and work it out. It's normally less than the WOT figure
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