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Old 20-05-2016, 10:58   #1
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What's the best dinghy fuel hose specification?

I have to replace my dinghy fuel hose again as it is cracking only 2.5 years since it was last done. Far too soon in my view. Last time I got a reinforced rubber fuel hose made to a specification normally used for vehicle fuel hose.

I suspect the specification is really not the best one. I need a fuel hose capable of withstanding the harsh Caribbean sun. I could cover it up with a fabric sheath I suppose.

Isn't there a good hose specification or make out there? Has anyone got any tips?
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Old 20-05-2016, 11:41   #2
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Re: What's the best dinghy fuel hose specification?

Wire loom, it's that split plastic corrugated tube you see on wires to prevent chafing.
I used it to cover my hydraulic steering hoses on my last boat as UV rotted them in a couple of years and losing steering on plane was no fun.
That and hose meant for fuel injection is a lot stronger and way more expensive, not sure it is more UV resistant though, but wire loom is and it's cheap.
Can be bought at auto parts sores by the foot.
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Old 20-05-2016, 11:53   #3
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Re: What's the best dinghy fuel hose specification?

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Originally Posted by a64pilot View Post
Wire loom, it's that split plastic corrugated tube you see on wires to prevent chafing.
I used it to cover my hydraulic steering hoses on my last boat as UV rotted them in a couple of years and losing steering on plane was no fun.
That and hose meant for fuel injection is a lot stronger and way more expensive, not sure it is more UV resistant though, but wire loom is and it's cheap.
Can be bought at auto parts sores by the foot.
Yes, that could work. I also have spiral wrap I use for tidying up electrical cables . The reason I would prefer not to cover it up is it is easy at a glance to see when it starts to crack. A removal and re-install adds work I'd rather avoid. You've prompted me for another post on hydraulic hoses.
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Old 20-05-2016, 12:24   #4
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Re: What's the best dinghy fuel hose specification?

5/8" double braid cover
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Old 20-05-2016, 15:06   #5
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Re: What's the best dinghy fuel hose specification?

FWIW, the OEM fuel hose that came with my current Yamaha 15 is now 11 years old, has been in constant use in high UV areas and is still flexible and uncracked. Dunno what its spec is, but you could source your replacement via Yamaha.

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Old 21-05-2016, 03:36   #6
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Re: What's the best dinghy fuel hose specification?

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FWIW, the OEM fuel hose that came with my current Yamaha 15 is now 11 years old, has been in constant use in high UV areas and is still flexible and uncracked. Dunno what its spec is, but you could source your replacement via Yamaha.

Jim
That's a useful to know. I'll look further.
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Old 21-05-2016, 03:53   #7
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Re: What's the best dinghy fuel hose specification?

Do not use hydraulic hose for fuel.

Gasoline needs a different rubber compound than is appropriate for hydraulic oil.

Diesel fuel also needs different hose than gasoline or hydraulic fluid.

And different hydraulic fluids can change what hose material is best...

The wrong hose type can potentially fail in HOURS. (or minutes)
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Old 21-05-2016, 06:48   #8
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Re: What's the best dinghy fuel hose specification?

I routinely cover the dinghy fuel tank (and most of the fuel line) with an old towel or rag donated for the purpose. Keeps the sun damage to a minimum.
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Old 21-05-2016, 15:13   #9
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Re: What's the best dinghy fuel hose specification?

Once you get a hose specific for gasoline, just paint it with vinyl paint. Just be sure to get gasoline approved hosing. Synthetic and natural materials react differently to gas then they do to diesel. Diesel will rot a lot of stuff. Gas will cause a lot of stuff to crack.
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