52 replies to this topic

[mrmeds]

it looks like E10 fuel has eaten the rubber on my braided fuel pipe of my twin 1 1/4 SU carbs, fitted new 18 months ago as part of JCG conversion.

Car is now leaking petrol over the manifold !.

Need to buy replacement, does anyone know what diameter I need ?

It measures 1/2 inch externally- but is the measurement the internal bore ?

 

thanks

Edited by Spider, 01 September 2021 - 07:21 PM.
Language please !

[cal844]

I used 1/4 inch ID on my HS4s (7mm is close but slightly too loose IMO so if the clamp fails or stretches then fuel leaks).

If the fuel hose is tight to go on heat it up in a cup of hot water.

Hope this helps

[mrmeds]

I used 1/4 inch ID on my HS4s (7mm is close but slightly too loose IMO so if the clamp fails or stretches then fuel leaks).

If the fuel hose is tight to go on heat it up in a cup of hot water.

Hope this helps

thanks 

[richmondclassicsnorthwales]

6mm is what I use with 1/4 in fuel hard line and 10 -12 mm fuel clips

 

I use Cupro lines or Copper , and with these I put a slight flare to make the hose "Catch" better

 

Just a personal choice. I also try to keep the rubber lines shorter rather than longer, and avoid bends, so the E10 petrol has less to attack

 

Straighter the rubber, the better.

 

Additionally, rubber is not as good as it used to be, from the day it is made, it starts deteriorating

[sonscar]

I would not recommend braided fuel lines after a similar failure,you cannot see what is happening until it fails,Steve.

[gazza82]

it looks like E10 fuel has eaten the rubber on my braided fuel pipe of my twin 1 1/4 SU carbs

Don't think anywhere has E10 in UK yet ... but the ethanol in E5 was probably a factor

[nicklouse]

it looks like E10 fuel has eaten the rubber on my braided fuel pipe of my twin 1 1/4 SU carbs

Don't think anywhere has E10 in UK yet ... but the ethanol in E5 was probably a factor

It is appearing but E5 ,as you say, will do the same.

[mrmeds]

 

 

it looks like E10 fuel has eaten the rubber on my braided fuel pipe of my twin 1 1/4 SU carbs

Don't think anywhere has E10 in UK yet ... but the ethanol in E5 was probably a factor

It is appearing but E5 ,as you say, will do the same.

 

my bad- E5-  but going to use premium from now on

[gazza82]

it looks like E10 fuel has eaten the rubber on my braided fuel pipe of my twin 1 1/4 SU carbs

Don't think anywhere has E10 in UK yet ... but the ethanol in E5 was probably a factor

It is appearing but E5 ,as you say, will do the same.

my bad- E5-  but going to use premium from now on

Some (most!) have ethanol in that too .. up to E5 (5%)

[Steve220]

All UK pump petrols have ethanol.

Replace hose with R14.

[gazza82]

All UK pump petrols have ethanol.

Replace hose with R14.

Apparently not Esso Supreme99+ .. although is may say 5% on the pump they claim is contains zero ethanol .. the law is UP TO 5% or 10% apparently.

[Deeppockets]

Gates has a range of ethanol-proof fuel hose to SAE 30R14T

 

Carb:

4219BG Barricade™ Carbureted Engines Fuel Hose | Gates Corporation

 

Fuel Injection:

4219BF Barricade® GreenShield® Fuel Hose | Gates Corporation

 

 

Moss list a Gate product line but not fully clear which line it is 

Ethanol Proof Fuel Hose by Gates (moss-europe.co.uk)

Edited by Deeppockets, 01 September 2021 - 11:17 AM.

[humph]

 

All UK pump petrols have ethanol.

Replace hose with R14.

Apparently not Esso Supreme99+ .. although is may say 5% on the pump they claim is contains zero ethanol .. the law is UP TO 5% or 10% apparently.

 

 

Yes and no, Esso Supreme does contain ethanol in certain parts of the country. See the vague and pretty unhelpful answer to their faq below.

 

https://www.esso.co....n-gb/fuels-faqs

 

 

How much ethanol is in Esso's E5 fuel?

Esso Synergy Supreme+ 99 contains zero ethanol, except (for logistics reasons) sites supplied from Scotland, North Wales, North England and Cornwall.

Edited by humph, 01 September 2021 - 12:10 PM.

[mrmeds]

okay- replaced hose today with 1/4 inch braided  from minisport- went on easily - still leaked petrol- so tried a smaller clip at the end- still leaking ( fuel collecting on top of float chamber.   

Am i missing something ?

Edited by Spider, 01 September 2021 - 07:23 PM.
Language please !

[cal844]

Post a picture of how the hose is fitted now