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Old 09 April 2010, 09:22   #11
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Country: UK - Scotland
Town: Edinburgh
Boat name: Sula / Mingulay
Make: Ribcraft 7.8/4m avon
Length: 7m +
Engine: 300 hp outboard
Join Date: Oct 2005
Posts: 79
Ah small world indeed!

Some pics would be great - if you could take a photo of how it sits on the transom that would be ideal. We have gone for a 300 suzuki so will have the same space issues. I presume you can still get full lock both ways on the big engine?

If you could let me know how it pushes her along speed wise that would be great - we get some pretty fruity tides round where we are but it would really be for emergencies only so as long as it can get us to the nearest shore eventually that would do.

Did you go for integral fuel tank or sep?

Cheers
Ally
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Old 09 April 2010, 09:41   #12
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Country: Ireland
Make: ribcraft 7.85
Length: 7m +
Engine: 250 yam
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i'm just going taking it out now, so wil take few pic's , i near sure that greg had a 6 hp suzuki, on vampire and there is another 7.8 called maverick ,you find threads on them here too, which was both 300hp suzuki, anyway know matter which way you turn them they don't touch, will send pic's tomorrow
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Old 09 April 2010, 11:39   #13
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I have a 6.5 m Vipermax and have a 15hp 2st aux

It sits a little high on the transom (but I'll make a new bracket for this year) but pushes the boat along at 7 knots very easily, I've towed a 7 m Vipermax with it to get us both out of shallow water and we still got 4 knots. I have a 22 litre tank on deck behind the rear jockey seats and it's not a problem

Jim
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Old 09 April 2010, 12:41   #14
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Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
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Quote:
Originally Posted by bedajim View Post
I've towed a 7 m Vipermax with it to get us both out of shallow water and we still got 4 knots.
Jim
It was a strategic decision to exit by means of the aux whilst on the Scillies, not a f'k-up. Honestly.
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Old 10 April 2010, 02:31   #15
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It was a strategic decision to exit by means of the aux whilst on the Scillies, not a f'k-up. Honestly.
You mean my 15 hp gearbox + prop is cheap to replace compared to a 200 + 250
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Old 10 April 2010, 07:19   #16
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Country: Ireland
Make: ribcraft 7.85
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can't find the lead to upload photos from phone to laptop so i'll post later, we were gettin bout 4.5 knots out of it, thats with 2 on board and half tank fuel [130 litres] it was blowing a good 15kts of wind and quit choppy .hope that helps
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Old 10 April 2010, 08:41   #17
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Country: UK - England
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You mean my 15 hp gearbox + prop is cheap to replace compared to a 200 + 250
Cheap for me.
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Old 11 April 2010, 15:59   #18
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Country: UK - England
Town: wakefield
Make: ribcraft
Length: 7m +
Engine: 250 suzuki
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Posts: 17
our ribcraft 7.5 wears a suzuki 250.

we use a yamaha 8hp 2-stroke as auxillary engine.

does about 5 mph comfortably, probably a bit more with the throttle max open.

fast enough to get you out of trouble, and easily de-mountable to go on our folded avon tender.

doesnt seem to make much difference to speed if you lash the 8 hp straight, and leave the 250 hp in the water (in neutral) so you can sit down and steer with the helm.

philip
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Old 12 April 2010, 09:35   #19
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Country: UK - Scotland
Town: Glasgow
Boat name: Thunder
Make: Halmatic Arctic 22
Length: 6m +
Engine: 2 x 150 Etec
Join Date: Oct 2008
Posts: 500
Or as someone else has suggested put twin engines on, you will still be able to get home a decent speed if something happens.
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Old 12 April 2010, 11:56   #20
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Country: UK - Scotland
Town: Edinburgh
Boat name: Sula / Mingulay
Make: Ribcraft 7.8/4m avon
Length: 7m +
Engine: 300 hp outboard
Join Date: Oct 2005
Posts: 79
much as i would love to go for twin engines for the safety benefit the extra cost was too much sadly. Looking like we will go for a suzuki 6hp - might not get us rocketing home but should hopefully see us right. Will also go with the black, black and more black colour scheme, which is of course crucial!!

Thanks to everyone for their input - boat going into mould as we speak i gather.....
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