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Old 14 January 2003, 04:20   #21
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Country: UK - England
Town: Edenbridge
Boat name: Scorpion
Make: Scorpion 8.5mtr
Length: 8m +
Engine: 315hp Yanmar Diesel
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Engines

Seahound

It would cost a lot of money to convert seahound to diesels as the boat is layed up for outboards etc. Again I agree with charles that the Yams would be my first choice if you have the money but the Evinrude's have a very good write up and are a lot cheaper to buy.


Ask Graham Jelly from Scorpion. He will advise you.

Julian
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Old 14 January 2003, 08:35   #22
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Country: Greece
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Engine: Yamaha 200Vmax
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Re: Engines

Quote:
Originally posted by Julian


It would cost a lot of money to convert seahound to diesels as the boat is layed up for outboards etc.
Julian I believe that you are very correct in saying that. To convert a boat made to carry outboards into inboards takes a lot of money, you need different strgnthening points, diffrent layout aft etc etc. Also you lose space.
But any way, Seahound I have asked my mate in Scorpion in Greece. He said that although he does not have experience on the10 mtr cabin he believes that because the Scorpion hull is a fast planing V shaped hull you can achieve the cruising speeds you are looking for with even 2xYamaha 200s VMAx HPDIs.
If you go for larger engines the obvious thing is that you will be increasing consumption but you also gain in pulling power whatever the carrying weight of the boat will be i.e. you will be able to cruise at 30-35 knots with the similar range revs if you have 6 people in and gear and if you have 2 people in and no gear.
I do not think when one talks about twin outboards has consumption in mind as all is relative I would say go for the 2 x Yamaha 200s VMax HPDIs (VMax technology come into effect after 4500 revs and the engine between 5000 and 6000 revs produces 230 bhp rather than 200bhp. However consumption figures double all round after 4500 revs).
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Old 14 January 2003, 09:11   #23
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Country: UK - England
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As far as costs go it would over the first yr of paid for itself if you intend doing some serious mileage.The problem is this is a difficult problem in as much that I believe you are replacing two outboardes with another two outbordes.I dont believe that you will get any real major savings.It will take a long time for you to get your investment back.

There are people in your neck of the woods who specilise in fitting Diesels into boats and fibrglass work if you pm me I will give you a few numbers.

What Im suggesting for consideration is a single diesl with a leg and a central aft engine box.At the moment you can only go for aprox 300 hp that will give you aprox 35 knts.In the next 2 yrs there will be new cummins electronic approx 370hp and proberbly a new Electronic Yanmar/leg.

I have to admit It is a big job the engine beds and engine box and stiffining up the hull where required but the question is will it cost 12k for this work as the deal you get on a single diesl around 300hp will be around the same as a 250 hp outboard.But with far less running costs.

Good luck
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Old 14 January 2003, 09:19   #24
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Country: UK - England
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Boat name: Scorpion
Make: Scorpion 8.5mtr
Length: 8m +
Engine: 315hp Yanmar Diesel
Join Date: Aug 2002
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Re Fit

You could put the 2 new 420 Yanmar's that would give it some power but I dont think its worth it. The cost of diesel being added would be a fortune. A engine box alone is seceral thousand pounds without the engine mounts and hull being strenghtened etc. It would be cheaper to sell the boat and start again. I suppose it depends how long you are keeping the boat for and if you can warrant spending a bomb changing over to diesel. As the boat is Rigged for 2 out boards with steering cables etc you may as well go for smaller more ecconomical engines. Or drive slower.
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Old 14 January 2003, 09:29   #25
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I agree she would fly with twin 420s but i would worry about the legs, the market is changing and fuel economy is becoming important to people, and I am aware of two new boats who have been asked for a re design of the hull to go for single diesls.I think it will not be long before you may see a new single Scorpian?.Lets see what happens, I may be wrong as they make more money out of selling twin engine packages.
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Old 14 January 2003, 09:36   #26
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Country: Greece
Town: Gloucetsreshire
Boat name: GATO DI MARE
Make: MAR.CO
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Engine: Yamaha 200Vmax
MMSI: 235027678
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Guys Guys

I think we have gone too far!!
To do major things like that on a boat and then concern about fuel consumption is a bit of a joke!!
Crazyhorse you have never asked what is the boat intended to be doing.
With all due respect not all people want to spend day in day out motoring along and specially the majority of people I know of they don't give a second thought about consumption.
A HOBBY DOES NOT HAVE A PRICE!!! One does it because one can afford to do it otherwise one does not do it at all!! Specially when you have a boat that cost you over or near 100K you must have the money and can afford the odd ltr of fuel (I recon).
The guy just want to replace his 2x300 bhp engines with smaller outboards. He is not a professional fisherman or a professional explorer and he does not want to circumnavigate either (or does he and I don't know ).
As far as I can see he just want to go on a cruise here and there a little bit fast and to have less fuel bills. End of story. He will get some money by selling the old motors, put a little bit more money and buy 2 smaller ones without any other major expense. Same controls same tanks etc etc
What is this all about new twin or single diesels, new geraboxes, and numerous boat modifications??
I think because of your pasion on diesels you got carried away
LOLOL
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Old 14 January 2003, 09:49   #27
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I accept that if he uses for a the odd rib.net bash and a bit of running about then the costs are still going to be in excess of 22k plus for 2 engines.

It is indeed how much he wants to use the boat?Outbords are great for the right application and diesls are great for there respective applications. I am not going to sit back here and watch everybody advise withought giving a second opinion.Indeed outbord may be seahouds preference.Fine I have no problem with that as it isnt my boat, Lets not forget that this boat is a 9.5 mtr rib, but at least he has listened to two sides of the story and can make a more informed decision. Also I dont want to be a kill joy but most outbords run at there most economic at about 3rd power,So if you downsize on engine you will need more revs and fuel consumption to push the boat along.

This reley isnt a simple question or answer,in my view.

Thats what a forum is about.In my view anyway.

Good luck Seahound
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Old 14 January 2003, 09:59   #28
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Country: Greece
Town: Gloucetsreshire
Boat name: GATO DI MARE
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Engine: Yamaha 200Vmax
MMSI: 235027678
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CRAZYHORSE

No disagreement to your posts as always!!
Just saying my views that's all. I believe that is healthy to have discussions where all opinios are heard without people getting heated up about it
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Old 14 January 2003, 10:05   #29
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Country: UK - England
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Join Date: Nov 2002
Posts: 1,012
Yep thats fine by me, Dont get all emotional over this,I just whish when I was looking at buying there were objective imfo out there,its hard and if you get the decision wrong then you will loose a lot of money.Its a sport and a hobby so maybe to some that doesnt matter,to me it does as If I save money I can get out more, and upgrade my kit more often.

I take im still invited on your boat for Rib.net then.

Ps I hope you aint got that cheepo vhf on board?
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Old 14 January 2003, 10:57   #30
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Country: Greece
Town: Gloucetsreshire
Boat name: GATO DI MARE
Make: MAR.CO
Length: 9m +
Engine: Yamaha 200Vmax
MMSI: 235027678
Join Date: Sep 2002
Posts: 3,339
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CRAZYHORSE

Yes you ALWAYS have an open invitation to come on my boat. So no need to ask!!
VHF of course I will have the cheap for spare and the fixed one is an ICOM Europe with GMDSS (the lot!!) CE marked, type approved etc etc bought in SAfrica for a LOT less than what ICOM dealres sell them in Europe!!!
Same with GPS GARMIN map/ Sounder with twin screens all in coulor with this new M-Chart or something.
As a matter of fact I have found that there are different prices in Europe and the US than what things sell for in SAfrica. Possibly is because of the lower currency value or something.
If you build a boat there it actually worth while to fit the kit locally. However, if you try to send any of these items separately in the UK the transportation costs will definately kill the lower price deal (unfortunately!!)
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