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Old 18 March 2002, 15:46   #11
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So Mike

Either pull your finger out, get that diesel boat on the water and get the miles in now,

or save the cash outlay, get a good 4 stroke on the blunt end

and also save the money on ear plugs!
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Old 18 March 2002, 15:56   #12
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OK - just to throw a spanner in the works

What about other fuels - OK a steam powered rib probably isn't a good idea, but I've seen an increase in Marine LPG being pushed at boat shows. At the LBS they even had a converted outboard

Conversion would be about £2500 per engine but marine LPG is about 32p/l as opposed to 70p - £1 /l you can do your maths.

Again as with the Diesel comments I'm not sure the extra cost for the engine would make sence for a "day" boat - but for Stealth's monster it might be an idea!! - He would have to go to Gernsey to refuel though!!

Anyway...... Here's the website http://www.lpg-boats.co.uk/

BTW as mentioned on another thread my Freelander V6 has been converted to LPG - I reckon that in the first year I will have saved the cost of conversion - and after that I will be saving £2000+ a year on fuel costs. - I don't have a company fuel card
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Old 18 March 2002, 18:06   #13
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thats interesting..........

a RIB lpg conversion has long been intriguing me. Up til now my think has been - need to find a RIB with an inboard petrol (rare) and convert. Not impossible but not so easy. But if someone is really doing 4 stroke outboards that a whole different kettle of worms (to mix my metaphors!). I know honda were looking at it a couple of years ago but had heard nothing more.

Other big question I guess is where to put the LPG tank? Assume that it couldn't go under the floor as per the petrol tank on a RIB as it needs to be able to vent to the air. But may well be wrong.

LPG availability isn't a problem on the East Coast or South Coast.
Hmmmmmmm better check out that website!

Alan
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Old 19 March 2002, 14:52   #14
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Mmmmmmmmmm, Thanks guys. I take your point about the extra costs. At £18,000 difference I wouldn’t even consider the diesel option, but at the £4,000 extra, and that's about the difference Humber quoted me too, (Still waiting for Ribcraft to get things together - evening Mark & Jason!), it may well be worth considering. OK, £4,000 is a lot of money to use on petrol but then that equation only works if you throw the boat away when you've finished with it. Presumably a diesel boat should have a higher re-sale value, so all the £4,000 won't go! Availability is a big issue, (which is what puts me off LPG..... (and the pressurised tank!). My main worry at the moment is the reliability of the outdrive, (and that applies to petrol inboards too). Still like the idea of cheap cross channel trips! Anyone want to buy my current Ribcraft 5.85? Then I will really have to get down to the decision making!
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Old 20 March 2002, 05:24   #15
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Swap

Ok, Mike...let's do a swap, I'll give you my Targa and in return you give me your Ribcraft plus 60K.. deal?
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Old 20 March 2002, 14:51   #16
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Is the 60k the for delivery costs ie petrol?
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Old 20 March 2002, 16:38   #17
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Stealth,

Yeah, great idea. Trouble is, it wouldn't fit in the front garden. I get enough stick from the wife about the RIB being there as it is Maybe if you find someone else to buy your Targa, they could buy my RIB as a tender? I'd never launch it down the Dover slip either!

Mike C
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Old 21 March 2002, 04:16   #18
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To add to the debate ref. LPG

I mailed LPG Marine & asked them about LPG conversions for outboards and where tanks could/should be located.

Response was.........

1. We have converted a 100hp 4 stroke to dual fuel, a quadruple carb set up. Development of this concept is in its early stages, so the kit is all hand built, CNC'ed etc and the craft must still comply to the COP 18, LPGA regulations. The kit to build by hand as you would expect is quite expensivei.e. £2,000.00. We are looking to go into the EFi market as this is where the manufactures are going.

2. LPG tanks can be mounted under the cockpit, seats or under the decking. All the tanks need to be fixed into place as a permanent fixture and all need the be vented via a skin fitting over the side / rear of the boat.

The rib would required all the safety systems, fittings, fitted under
the LPGA's code of practice 18. You may look at putting an inboard in, if that is an option! That has been done by us.

Interesting stuff eh!

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Old 21 March 2002, 20:07   #19
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Did they mention if you need a left-handed gerzerbalsplat or the new ambidextrous fitting. Also, I hear tell that the rear venting can be omitted with the use of an oral inhaler, (obviously to ISO spec 7864679076580, sub section D, paragraph 4). The technique is to fit the inhaler into the LPG tank, ensuring that the attached tube is fed under the pod seat, through the cushion and up your arse.

Seriously, I was under the influence, sorry impression, that LPG needed to be stored in a pressurised tank. That does not sound very healthy to me in a RIB! Also, I have yet to see any figures that tell me how far you can go on a litre of LPG. OK, it’s cheaper per litre but is it as efficient? If it only takes you half the distance????

Maybe the best idea is to use that oral inhaler after attaching as described above, connect the other end to the engine and eat a lot of beans!
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Old 23 March 2002, 18:12   #20
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At least.............

the LPG marine people respond to emails. Whereas RIB Manufacturers and brokerage services with websites seem somewhat reluctant to do so
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