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Old 08 May 2014, 11:05   #1
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Fuel hose - any particular type for outboards?

Daft question I expect...any reason not to use regular automotive fuel hose for outboards? I need to fit some to a flexible tank to mate up to the Mariner connector. They use a grey type with plastic liner but I've found it annoying as when you cut it the plastic liner squashes up inside when you push it over the fuel tank/connector barb.

The hose fitted is 10mm ID, is this overkill for a 15 hp??
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Old 08 May 2014, 11:54   #2
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Don't know about the UK, but hose for use in the US is supposed to be USCG certified. I doubt that everyone holds to this however, and I've never heard of an inspection failing because of uncert'd fuel hose.

That said, I'd go with marine rated hose if at all possible, as it *may* have additional UV stabilizers and such that you won't find in automotive hose, which is designed to live under the hood (or bonnet.)

jky
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Old 08 May 2014, 14:28   #3
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Quote:
Originally Posted by Max... View Post
Daft question I expect...any reason not to use regular automotive fuel hose for outboards? I need to fit some to a flexible tank to mate up to the Mariner connector. They use a grey type with plastic liner but I've found it annoying as when you cut it the plastic liner squashes up inside when you push it over the fuel tank/connector barb.

The hose fitted is 10mm ID, is this overkill for a 15 hp??
Try ebay plenty on there
Fuel Petrol Line ORIGINAL Mercury Mariner Outboard Motor Marine 8mm ID Sold by M | eBay
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Old 08 May 2014, 14:49   #4
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If you have a fixed (inboard tank) fuel system, then:

"ISO 7840:2004 applies to hoses for small craft with permanently installed fuel systems. It does not apply to hoses entirely within the splash well at the stern of the craft connected directly to an outboard engine."

To be honest I use this throughout regardless of the circumstances as it is good quality hose that lasts for years without degrading and isn't really that expensive.
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Old 08 May 2014, 16:58   #5
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Cheers guys, found plenty of ISO 7840 on ebay so I'll use that. As per OP specifically didn't want the plastic liner Mariner type.

fuel hose marine 7840 in Boats Parts & Accessories | eBay
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