oukippy Posted February 7, 2020 Report Share Posted February 7, 2020 Hello, I have a fuel leak issue. It seems to be between fuel pump and carburator. I want to replace the falty fuel line but I'm wondering what is the correct size for it ? I was told that it's 5/16 inner diameter (8 mm in metric system, I believe). Do you confirm ? Thank you very much ! ouki Quote Link to comment
5t341tH Posted February 7, 2020 Report Share Posted February 7, 2020 i believe that is correct. but you can take off the hose and take it to the parts store to buy a replacement Quote Link to comment
bilzbobaggins Posted February 7, 2020 Report Share Posted February 7, 2020 Unless you get a discount at the parts houses, its sooooooo much cheaper to buy it online FYI. Last time I went to get it locally, they wanted $4.00 a foot. You can get it from amazon much cheaper. 25 foot roll for under 21 bucks. 1 Quote Link to comment
datzenmike Posted February 7, 2020 Report Share Posted February 7, 2020 Only need 6". I measured mine and... 6.6mm with a bead on the end of 7.25mm. 1/4" is 6.35mm. It should easily stretch 1mm to push over the bead. I've had carbs off and forgot to tighten the hose clamp when put back on. Drove for months and no problem. Saw it one day and put the clamp back on. Quote Link to comment
G-Duax Posted February 8, 2020 Report Share Posted February 8, 2020 (edited) That is what I use on mine, every auto supply store has it. Additionally, buy enough to replace all the fuel line (don't worry, it's cheap), because it's probably all the same age, and just as rotten. fresh stainless steel hose clamps probably wouldn't hurt either. Edited February 8, 2020 by G-Duax more info Quote Link to comment
oukippy Posted February 9, 2020 Author Report Share Posted February 9, 2020 Thank you for the help. I thought it had to be close to the OEM size but now I understand it's not very important. I agree that prices are much lower online. Quote Link to comment
datzenmike Posted February 9, 2020 Report Share Posted February 9, 2020 But you don't need 20' of it. Another good source is the wrecking yard. Go look at some Jap cars and get what you need. Usually in good shape and could be just a few years old which is better than 40+. Also pressure rated for EFI pumps. I ask how much? and they usually just roll their eyes. Quote Link to comment
oukippy Posted February 9, 2020 Author Report Share Posted February 9, 2020 On 2/8/2020 at 12:58 AM, datzenmike said: Only need 6". I measured mine and... 6.6mm with a bead on the end of 7.25mm. 1/4" is 6.35mm. It should easily stretch 1mm to push over the bead. I've had carbs off and forgot to tighten the hose clamp when put back on. Drove for months and no problem. Saw it one day and put the clamp back on. I assume that 6.6 mm is the outer diameter ? Quote Link to comment
Stoffregen Motorsports Posted February 9, 2020 Report Share Posted February 9, 2020 Be careful of quality. Many of the choices you find online may not be the best rubber available. Rubber breaks down with exposure to gasoline, and there are good, better and best grades available. Ask your parts store guy for the best grade, but make sure it's not high pressure EFI hose. That EFI hose is very rigid and hard to work with. Quote Link to comment
oukippy Posted February 9, 2020 Author Report Share Posted February 9, 2020 Just now, Stoffregen Motorsports said: Be careful of quality. Many of the choices you find online may not be the best rubber available. Rubber breaks down with exposure to gasoline, and there are good, better and best grades available. Ask your parts store guy for the best grade, but make sure it's not high pressure EFI hose. That EFI hose is very rigid and hard to work with. Last week I went to a local shop. I didn't find what I was interested in, asked the vendor who told me: "I don't have this in the store, go to the website, give me the reference you want and I will order it for you." I finally ordered it by myself in order not to drive 50 km a second time. 1 Quote Link to comment
datzenmike Posted February 9, 2020 Report Share Posted February 9, 2020 I don't think they even use rubber where petrochemicals are concerned. Rubber is dissolved in gas and or absorbs it and swells in the case of oils. Nitrile and Viton are synthetics. Quote Link to comment
Stoffregen Motorsports Posted February 9, 2020 Report Share Posted February 9, 2020 You're right. I used the word rubber as a generic term. Quote Link to comment
oukippy Posted February 9, 2020 Author Report Share Posted February 9, 2020 1 hour ago, oukippy said: I assume that 6.6 mm is the outer diameter ? Just to be sure that Mike saw the question. Quote Link to comment
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