Mounting fuel hose

[tronic72]

Hi all,

I'm running new flexiable 1/2 inch fuel line with a 23 mm OD and am unsure the safest way to mount this fuel line to the hull.

Hoping you can help.

Thanks.

[Sailmonkey]

I've been using these (http://www.galco.com/buy/Thomas-and-...FQcvaQodey8ABQ), a small screw, and a zip tie for years.


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[tronic72]

They look a great idea. I'll look into them.


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[a64pilot]

To use the cable tie, you need something to put screw into, I glue small blocks of marine plywood to the hull with 5200. Use masking tape to hold them in place until the 5200 sets


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[SSgtPitt]

Where do you buy a small amount of marine plywood?

[a64pilot]

I swipe it from work, they use it to make forms with and there is always scrap pieces.
But it's my understanding that at least for this kind of thing that exterior grade plywood is just as good, that the difference between the two is there are less voids in marine grade, but to cut up 1" or 2" blocks I don't think it matters, you do want exterior grade if possible though as interior grade uses I believe water soluble glue to hold it together and if it gets wet it may delmainate

[capt jgw]

Right about the plywood. For anything non structural exterior grade is fine. Same glue as marine grade. The big box lumber stores have small pieces for sale pretty cheap. For mounting hose I like the rubber lined wire clips. Won't chafe the hose.

[Sailmonkey]

Originally Posted by capt jgw

Right about the plywood. For anything non structural exterior grade is fine. Same glue as marine grade. The big box lumber stores have small pieces for sale pretty cheap. For mounting hose I like the rubber lined wire clips. Won't chafe the hose.

Neither will the zip ties in the nylon pieces. Chafe needs movement.....no movement, no chafe.


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[a64pilot]

If you mean these, in the airplane world we call them DG clamps
MS21919 DG / WDG CLAMPS from Aircraft Spruce

But I think it would take a long time for a zip tie to chafe a Marine fuel line. But I have see zip ties cut through a steel aircraft engine mount, all it takes is a little sand and oil and the zip tie will cut like a hack saw.

[rwidman]

Originally Posted by Sailmonkey

Neither will the zip ties in the nylon pieces. Chafe needs movement.....no movement, no chafe.


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It's important when using zip ties not to get them too tight. This can damage hose or wire insulation. You want them just tight enough that the hose won't move, no tighter. Same for wires.

[Sailmonkey]

Originally Posted by rwidman

It's important when using zip ties not to get them too tight. This can damage hose or wire insulation. You want them just tight enough that the hose won't move, no tighter. Same for wires.

That's one of those skills that can't be taught.....sort of like needed torque on a bolt. Some people will tighten everything like it's a 1" grade 8 bolt.....


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[a64pilot]

Back to the airplane thing, zip ties are usually verboten on wiring as they will break wires, usually wires are tied with what amounts to string, called lacing I think.

https://www.amazon.com/Waxed-Lacing-.../dp/B005PQRLTC

I use zip ties too on the boat, but do leave them loose enough so that they hopefully won't break wires

[Sandero]

Originally Posted by SSgtPitt

Where do you buy a small amount of marine plywood?

Use a small piece of teak or even oak

[dridas]

Originally Posted by a64pilot

Back to the airplane thing, zip ties are usually verboten on wiring as they will break wires, usually wires are tied with what amounts to string, called lacing I think.

https://www.amazon.com/Waxed-Lacing-.../dp/B005PQRLTC

I use zip ties too on the boat, but do leave them loose enough so that they hopefully won't break wires

Yes. I've been doing aircraft avionics for the past 22 years, and lacing tape, which is string impregnated with wax. There is a specific way of tying it as well.

For boats and cars, zip ties can work, but I would utilize a thick electrical type tape. In aviation we call it build-up tape. It's thick and doesn't stretch like actual electrical tape. It provides a barrier between the zip tie and the wires, to prevent chafing. It's typically used inside the connector backshell to prevent movement, but will work for anti-chaffing where you utilize zip ties.

Zip ties on insulated wire is just asking for trouble. You can also wrap the wire bundle in cloth tape, or first aid tape under the zip ties.

[thinwater]

Glue on studs are a MUCH more professional approach, much simpler, lighter, and stronger than fussing with gluing on plywood and then screwing something to that.These are from Duckworks. You can glass them in if you want even more strength.

Use with WDG clamps.