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Old 12 February 2013, 09:49   #21
nik
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The thing that has always struck me about marine diesels is that they are soooo expensive.

An idea I fancied trying one day would be to use a secondhand automotive engine.

An engine I like is the VW V6 Tdi. Its a stonking engine, smooth, very torquey and its comparatively short being only 3 pistons long.

The biggest problem as I see it is separating the engine electronics from the car, immobiliser etc.

Things like heat exchangers needn't cost too much, I could never work out why the mercruiser one was 700

Also if you make an engine box, go from tube to tube to give yourself plenty of space to work on the engine.

Hope that helps
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Old 12 February 2013, 10:28   #22
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Things like heat exchangers needn't cost too much, I could never work out why the mercruiser one was 700
This is how it was explained to me. Mercury/Mercruiser buy it from a supplier, they sell it to merc export, who sell it to Marine Power in Belgium, they sell it to Barrus, who sell it to a dealer, who sells it to you!

Lots of hands in the cookie jar I'm afraid.
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Old 12 February 2013, 13:03   #23
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Its never going to stack up financially to stick an oil burner in the Rib, a newer 4 stroke, Opti or Etec would be a much better option.

If you do want to go ahead I would suggest you look for a used Volvo KAD32 and a DP leg. The 32 is 170hp, 4 pot, lightweight and supercharged. You can pick used ones up for 10k if you are very lucky. Coastal Rides are the guys to talk to for more info.

I wouldn't touch the Mercruiser 1.8Dti with a barge pole, its only 120hp and has loads of problems. There is a guy in Ireland who was on his 3rd or 4th Turbo.
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Old 12 February 2013, 14:47   #24
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if you look on boat mad there quite few guys running 320 cdi engines on mer leg, best to play get it right in the garage then take off engine
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Old 12 February 2013, 17:15   #25
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Quote:
Originally Posted by nik View Post
An engine I like is the VW V6 Tdi. Its a stonking engine, smooth, very torquey and its comparatively short being only 3 pistons long.
We've got one in our hard boat, getting 6.5t semi-displacement up to 20kts full chat. Fantastic bit of engineering (other than a recurrent oil leak) and so easy to service with all the maintenance items located at the front. Would be absolutely superb in a rib.

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The biggest problem as I see it is separating the engine electronics from the car, immobiliser etc.
Have a look here. This bloke seems to be doing a good job of it.

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Originally Posted by willk View Post
Hyundai have a 170hp on the market - I think it marries up to the Bravo leg. It's a lightish motor at 261kg
Saw one of these in the flesh for the first time at the London Boatshow. Looked very similar to the VW. I would investigate further if I was in the market. Priority with all these things is service spares though. If you can go to your local car dealer, as with the VW, then all well and good (though strangely some service parts are cheaper through Barrus).
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Old 12 February 2013, 19:08   #26
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I put a Steyr 260Hp inboard into my Zodiac Hurricane and have been very happy. 43Kts with a Volvo Duo Prop. It was cheaper and quieter than a outboard.
I have a stack of photos in my profile to have a look at if you want.
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Old 13 February 2013, 05:13   #27
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Quote:Originally Posted by nik
The biggest problem as I see it is separating the engine electronics from the car, immobiliser etc.

Erin:
Have a look here. This bloke seems to be doing a good job of it.
Thanks for that, I have bookmarked it in case I ever get around to it.

I have looked at Steyr myself and have been quite impressed by them, but again pricey, 15K a few years ago.
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Old 13 February 2013, 07:34   #28
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Quote:
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I put a Steyr 260Hp inboard into my Zodiac Hurricane and have been very happy. 43Kts with a Volvo Duo Prop. It was cheaper and quieter than a outboard.
I have a stack of photos in my profile to have a look at if you want.
Steyr's are great engines but service and parts through the UK agents was VERY expensive.
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Old 13 February 2013, 18:43   #29
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Thanks again guys.

I rekon I could do this for @7.5K, which would be a damm sight cheaper than a newer outboard.

Plenty to ponder I think.

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Old 14 February 2013, 06:41   #30
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looking at old posts Pete7's Pac 22 with 200hp was running 1 litre per mile, with diesel more than petrol that must work out about the same. Yours is a heavy boat and will be more so with a great big lump in the stern.

7500 buys a lot of fuel until you even break even, will you get more for you boat when you sell? perhaps not as it will be converted, wouldn't bother me but buyer are fickle. How many miles per year would you be doing could be many years just to break even.

Biffer what diesel have you in your searider?
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