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Old 31 December 2002, 06:35   #21
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Country: UK - England
Town: Blackpool
Boat name: To Exi
Make: new sib 4 man
Length: 8+ft
Engine: Mariner 4hp long shaft
Join Date: Nov 2002
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Well Alan,

Thanks for being the bearer of bad news,Were all knackerd.

Crazyhorse
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Old 31 December 2002, 08:03   #22
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Country: Greece
Town: Gloucetsreshire
Boat name: GATO DI MARE
Make: MAR.CO
Length: 9m +
Engine: Yamaha 200Vmax
MMSI: 235027678
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Outdrives in General

I'm not an engineer but when I had boats with outdrives (and problems TO MANY TO MENTION!!) a VOLVO enginer told me more or less what Alan sais.
I have changed now to outboards (and smaller boats) and on the sailing cat (38 ft - 10 berth) I have 2 x mini VOLVOS 35 bhp each (under the aft beds) and as you would expect on shafts -take a bit more space than the leg but less moving parts.
Having had the experiences I had with the outdrives in the past I never had them on a boat I owned again. Now would only go for shafts (you need more space of course but not as many probs-is this correct or am I wrong??).
In short I believe that at sea the less complicate equipment one has on his boat the better it is.
I hope you all agree with that
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Old 31 December 2002, 08:23   #23
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Country: UK - England
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Boat name: To Exi
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Length: 8+ft
Engine: Mariner 4hp long shaft
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Manos,your right with the less complicated the better.

But I got some work to do based on Alans post, as I looked long and hard at this baby and whent full circle.

I will come back to you with the imfo.

Crazyhorse
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Old 31 December 2002, 08:25   #24
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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

Looking forward to it. This Thread has been an eye opener for me. Cheers
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Old 31 December 2002, 17:21   #25
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Country: UK - England
Town: Great Harwood, Lancs
Boat name: Tigger II
Make: Bombardier Aerodeck
Length: 3m +
Engine: Tohatsu 25HP
Join Date: Jul 2001
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Hi Dirk

The engine is the 4 cyl, 240HP Yanmar.

This may help if they use the same mount on the 4 & 6 cyl engies as the engine will be lighter (I hope)

Regards Gary
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Old 01 January 2003, 08:56   #26
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Country: UK - England
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Boat name: To Exi
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All the best to everybody and your familys for New yr.

On with the buisness.Alan I am interested in your recomendations as far as the decisions re V drives and Jets as I am of the opinion that even though some combinations are unreliable, Outdrive/inboard are still are the most practical and efficient propulsion/economic/for there weight and size.
I am of the belief that ribs over 33 ft suffer from the deminishing returns syndrome,Big time and that aprox 33 ft is the overall size that Ribs will top out at this size and associated weights in the market place.
As this is there most efficient size for space and room and speed.

I am of the opinion that Z drives and Jets are very limited for Ribs up to that size of boat.I am aware of there specilised application benefits but I am looking at it for general use,space,economy and budget and speed.

Your thoughts and reasons will be most interesting on this subject and appreciated?

pint a lbs

All the best Crazyhorse

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Old 06 January 2003, 09:27   #27
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Country: UK - England
Town: Edenbridge
Boat name: Scorpion
Make: Scorpion 8.5mtr
Length: 8m +
Engine: 315hp Yanmar Diesel
Join Date: Aug 2002
Posts: 696
Yanmars

Afternoon All

I have to say that we have been using Yanmar engines for the last 5 years and the engines have never dropped a beat. They are great engines and if they are installed properly with the heavy duty engine mounts as scorpion use you should not have any problems. There are problems with the drives but we all know about them and there's not much we can do.

I would reccomend Yanmars to anyone.


Julian
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Old 06 January 2003, 17:30   #28
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Country: UK - England
Town: Blackpool
Boat name: To Exi
Make: new sib 4 man
Length: 8+ft
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Join Date: Nov 2002
Posts: 1,012
Julian thanks for your reply ,how many hours have you done using the same engine and what drive have you got.Do you no the weight of your boat.

Cheers Crazyhorse
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Old 07 January 2003, 04:23   #29
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Country: UK - England
Town: Edenbridge
Boat name: Scorpion
Make: Scorpion 8.5mtr
Length: 8m +
Engine: 315hp Yanmar Diesel
Join Date: Aug 2002
Posts: 696
Yanmars

Hi Crazyhorse

We have the Yanmar 300 with the Bravo 3 leg with a shower cap fitted. Our current engine has done 490 hours so far and is fine. We blew our first gear box up after 80 hours of use. We had the leg re built using stronger parts and so far it has not let us down.

We spent a lot of money of extra beefy engine mounts and shocks that prevent the engine from taking too much abuse. Its not cheep but well worth it in the long run. Not sure of the exact boat weight but with fuel it must be 2.5 tons or so.

our last boat had twin 300 yanmars and they were fine to. They had done about 300 hours when we sold the boat. I think it depends on how you drive the boat. If you drive flat out in all kinds of sea Ie Racing then things will break. Best thing to do is not race, its too expensive.

Julian
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Old 07 January 2003, 06:22   #30
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Country: UK - England
Town: Blackpool
Boat name: To Exi
Make: new sib 4 man
Length: 8+ft
Engine: Mariner 4hp long shaft
Join Date: Nov 2002
Posts: 1,012
Thanks julian,

It seems the engines are good but its just the legs that arnt.I think if you want longevity then its a Yanmar with a bravo 2 that seem s the way forward.I have a kad 300/dpg and will let you know how that seems to be.Its uknown at this stage so we will see.At least people that read these forums can get a feel for what is working and what doesnt in the hope they learn bye our mistakes.

All the best Crazyhorse

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