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Old 09 January 2009, 07:54   #51
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Outboard Fires

I wonder If there is anyone who is employed in the design/manufacture/distribution of outboards who could provide informed comment
It would be nice to know what the manufacturers position is
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Old 09 January 2009, 07:56   #52
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I was considering one of these

http://www.firetrace.co.uk/

Cylinder in the console. Run the tube once around the inside of the console and then off down the conduit, up through the control umbilical and then once around the engine. All nicely hidden away + automatic if you wish.

I would have thought that if you have a built in tank, you should have a shutoff valve easily accessible forward of the driver's seat (so you can close it as you move away from the engine). Built in to the console for instance.

Richard
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Old 09 January 2009, 08:05   #53
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I would have thought that if you have a built in tank, you should have a shutoff valve easily accessible
My Ribcraft has one of these accessible from inside the console
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Old 09 January 2009, 11:20   #54
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You need to remove either the oxygen or the fuel. (and I mean anything that will burn, not just the petrol!) Removing ignition source will stop it restarting. The wet blanket works by preventing (or reducing sufficiently) further oxgen form getting to the fuel. Water works on wood & paper type fires becasue the wood / paper absorbs it & it cools down. Petrol & oil, however, float on water, so throwing water at a petrol or oil fire will just disperse it. You guys that managed your car / bike fire with water were lucky.
Most ships have fire pumps - using plain sea water!!!

Have you ever seen the firebrigade putting out a burning car? We get lots around here!!!

They normally use just plain old water - yes they are trained and they have lots of water but there is quite a bit around a boat as well.

Even when a petrol station goes up they use just plain old water. Foam is obviously better but they don't have many foam tenders handy.



A fire in an oil refeinery - again no foam.



And finally a fire boat - I wonder where they get the water from???



Now obviously if you have something like a burning chip pan you don't just chuck a bucket of water over it - but you don't point a CO2 extinguisher at it either - you actually use something called common sense!!!
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Old 09 January 2009, 11:37   #55
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You need to remove either the oxygen or the fuel. (and I mean anything that will burn, not just the petrol!)
The third option is to cool everything down so the fuel (burning material; not necessarily gasoline) is below the combustion temp. CO2 extinguishers partially do this. They also starve the fuel of O2.

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Old 09 January 2009, 11:38   #56
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Have you ever seen the firebrigade putting out a burning car?

Even when a petrol station goes up they use plain water

Fire in an oil refeinery - again no foam.

And finally a fire boat - I wonder where they get the water from???
My interest on this thread relates purely to an outboard motor fire on a RIB that is crewed by amateurs. I don't have access to high pressure, high flow water pumping equipment. I don't have fire fighting PPE and I'm not qualified or trained to tackle gas station fires, oil refinery fires or anything that a fire boat might tackle.

Thank you for contributing to an extremely informative thread but personally I'm favouring the RNLI advice of an extinguisher and a blanket.
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Old 09 January 2009, 12:17   #57
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I am not qualified either but I would still use a bucket of water if I had nothing else to hand!!!
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Old 09 January 2009, 12:35   #58
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So what is the consensus then ? a Co2 extinguisher and wet jacket or blanket and know where you can shut off your fuel line then ? and most scenarios should be a variant treatable by these methods, powder is a no no then ?
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Old 09 January 2009, 12:45   #59
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So what is the consensus then ? a Co2 extinguisher and wet jacket or blanket and know where you can shut off your fuel line then ? and most scenarios should be a variant treatable by these methods, powder is a no no then ?
I don't know.

Trouble is, CO2 extinguishers all seem to be huge in comparison with dry powder (hence what I said earlier about a self-righting bottle-it's a little smaller) The Firetrace quotes a 40 second response time. That seems a long time to me-hopefully I'd spot a problem and extinguish it before the firetrace even discharged. I can't see it being very easy to fit a firetrace where it's needed either (high up in the cowling to allow the heat to trigger it faster at a guess?)

I've got no doubt dry powder will work but it's not very nice to what it's sprayed on.Your chances of getting going again after using it on something minor like a spit back are going to be slim. However, I'd rather that than fry...
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Old 09 January 2009, 12:55   #60
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I don't know how effective CO2 will be - it will put the fire out but if the wiring has lit then it will need to be quenched.

A fire blanket or wet coat would be good but the best thing would be an access point to get into the engine without lifting off the cowl.

http://uk.youtube.com/profile?user=briggsys&view=videos

Here are some videos showing CO2 - dry powder and foam on a fuel fire. The foam is far better.

I carry 2x 2l foam extinguishers similar to these I found on Ebay for 10 each - bargain!!!

http://cgi.ebay.co.uk/2-LITRE-FOAM-T...QQcmdZViewItem

I have also bought 2 small chemical foam units from Tesco - they are made from aluminium and plastic so shouldn't rust. Claimed to be good on electrical and chip pan fires. Only 10 each.

http://www.fireangel.co.uk/Product.aspx?id=200

They look perfect for an outboard fire if you can get the stuff in there!!!
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