Fuel hose

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Fuel hose

Post by ard126k » Wed Sep 11, 2019 5:47 pm

I've had two instances recently of fuel hose splitting on the outside of bends. Is this what modern ethanol-laced petrol does or does it just dissolve hoses until they leak? The pipe walls were full thickness either side of the splits
Just curious
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Post by scimjim » Wed Sep 11, 2019 6:00 pm

Yep, splits on the radius are generally the first sign.


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Post by AJL Electronics » Wed Sep 11, 2019 6:31 pm

You might find the thread "Death of a Scimitar" enlightening. It is the reason why I started stocking this: http://ajlelectronics.co.uk/epages/8323 ... s/BIOHOSE8


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Post by DARK STAR » Wed Sep 11, 2019 6:53 pm

Ethanol rots just about anything
The inside of my fuel tank is disintegrating although the outside is fine
And I use only 98 proof petrol which has the minimum 5% ethanol :evil:


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Post by mark rudder » Thu Sep 12, 2019 7:49 am

I'm curious about the ethanol, does all your fuel have some % of ethanol in it?
In Australia, only our "standard" fuel has ethanol (10% for 94 octane ) & we have
91, 95 & 98 octane available. What do you use in stationary motors, lawn mowers etc?


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Post by philhoward » Thu Sep 12, 2019 8:09 am

I think it's currently 5% for standard (95) fuel - going up to 10% at some point, I gather. Not all "Super" has Ethanol - or didn't last time I looked but as you get 97, 98 and 99RON Super Unleaded you can see it's all the same stuff :roll:

If you want non-Ethanol fuel you can still get it at specialist outlets (bit like leaded fuel - it is still available but the price is eye watering) but it's cheaper to either use some sort of stabiliser in the fuel, or drain/refill after a few months of inactivity..


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Post by DARK STAR » Thu Sep 12, 2019 4:14 pm

In France the standard is 95 octane with 10% ethanol, then super 98 with 5% ethanol.
There is no zero ethanol.

Phil, is there an ethanol neutraliser then, you say 'stabiliser' ... ?
I don't think draining and refilling is a viable solution for avoiding rusty petrol tanks :?


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Post by philhoward » Thu Sep 12, 2019 4:44 pm

Yes - Briggs and Stratton even do one for example. I don’t know what brands you can get in France? Maybe look in the fuel additives section in Carrefour?


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Post by ard126k » Thu Sep 12, 2019 7:47 pm

Sounds like a regular pulling and twisting of all hoses is in order.


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Post by Old and Slow » Thu Sep 12, 2019 8:55 pm

AJL's fuel pipe is rated to withstand ethanol, but I guess all flexible fuel hose has a limited life - does anyone know how often the new stuff ought to be changed? Every 5 years?


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Post by ScimmyMike » Thu Sep 12, 2019 9:50 pm

philhoward wrote:
Thu Sep 12, 2019 8:09 am
I think it's currently 5% for standard (95) fuel - going up to 10% at some point, I gather. Not all "Super" has Ethanol - or didn't last time I looked but as you get 97, 98 and 99RON Super Unleaded you can see it's all the same stuff :roll:
Shell V-Power I've noticed now has E5 stickers on the pump handles now sadly, I use Ethomix in my SAAB and Millers VSP in my Scimitars when running


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Post by GavinR » Fri Sep 13, 2019 12:01 am

ScimmyMike wrote:
Thu Sep 12, 2019 9:50 pm
philhoward wrote:
Thu Sep 12, 2019 8:09 am
I think it's currently 5% for standard (95) fuel - going up to 10% at some point, I gather. Not all "Super" has Ethanol - or didn't last time I looked but as you get 97, 98 and 99RON Super Unleaded you can see it's all the same stuff :roll:
Shell V-Power I've noticed now has E5 stickers on the pump handles now sadly, I use Ethomix in my SAAB and Millers VSP in my Scimitars when running
Yes I saw that recently - I always try and use Shell V-Power when I can
Either they have reformulated it or reclassified it, I thought the original Optimax / V-power didn't have any ethanol


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Post by scimjim » Fri Sep 13, 2019 12:15 am

Allegedly, “Up to 7% bio-diesel in diesel is considered not to cause any compatibility issues with car fuel systems and there's no need to mark pumps to tell customers that the fuel may contain biofuel”

However, labels had to be on all pumps by 1 sept 2019.


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Post by AJL Electronics » Fri Sep 13, 2019 7:09 am

Old and Slow wrote:
Thu Sep 12, 2019 8:55 pm
AJL's fuel pipe is rated to withstand ethanol, but I guess all flexible fuel hose has a limited life - does anyone know how often the new stuff ought to be changed? Every 5 years?
If you can show me a piece of Cohline supplied by me that has degraded due to any fuel, I will replace it no matter how old. It is fit and forget.


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Fuel hose

Post by ard126k » Fri Sep 13, 2019 2:20 pm

Ethanolanoia is now setting in. Are there any other rubbery parts of the fuel system I should be looking at? Tank sender gasket? Don't think there's any rubber in the carb that contacts fuel?


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