Westy Posted March 19, 2020 Report Share Posted March 19, 2020 The copper fuel pipe on my TR4A is 1/4" OD between the carbs but 5/16" leading up to them. Does anyone know if this is usual? Does it even matter? What size should the pipe be? I am in the process of checking and replacing the fuel lines and pump to surtout an issue with fuel supply. Thanks! Quote Link to post Share on other sites
RogerH Posted March 19, 2020 Report Share Posted March 19, 2020 (edited) That sounds about right. The 1/4" pipe is only feeding one carb. feeding both carbs from the pump. So 5/16" for 2 carbs and 1/4" for the end one from tank to pump Roger Edited March 19, 2020 by RogerH Quote Link to post Share on other sites
Westy Posted March 19, 2020 Author Report Share Posted March 19, 2020 Ah..I see. Makes sense - thanks Roger! P.S. Do you get a gold TR badge when you hit 25,000 posts?! Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 19, 2020 Report Share Posted March 19, 2020 History...according to the parts books, part numbers and originally supplied items I have had through my hands or sold when behind the counter. So do not shoot the messenger. TR2-3-3A-3B & some TR4 used a 5/16" tube pump to carbs. (H type carbs float chamber inlet pipes I guess is the controlling factor where push on connectors are used.) TR4-4A, TR250, TR6 Carb models used 1/4" tube pump to carbs. (Stromberg and HS types carbs float chamber inlet pipes being the controlling factor here - all using 1/4" push on connectors) Cheers Peter W Quote Link to post Share on other sites
RogerH Posted March 19, 2020 Report Share Posted March 19, 2020 22 minutes ago, BlueTR3A-5EKT said: History...according to the parts books, part numbers and originally supplied items I have had through my hands or sold when behind the counter. So do not shoot the messenger. TR2-3-3A-3B & some TR4 used a 5/16" tube pump to carbs. (H type carbs float chamber inlet pipes I guess is the controlling factor where push on connectors are used.) TR4-4A, TR250, TR6 Carb models used 1/4" tube pump to carbs. (Stromberg and HS types carbs float chamber inlet pipes being the controlling factor here - all using 1/4" push on connectors) Cheers Peter W I have just had a quick measure and that is what I have fitted. 1/4" pipe from pump to all carbs 5/16" from tank to pump Sorry for the rubbish above Roger Quote Link to post Share on other sites
Westy Posted March 19, 2020 Author Report Share Posted March 19, 2020 OK, got it. Couldn't quite figure out why I had one piece of 5/16" ID rubber pipe being used to meet 5/16" OD copper pipe from pump at one end and 1/4" OD connector at first carb. So, I'll swap 5/16" pipe from pump to carbs for 1/4". Beginning to feel like the Danny Kaye, pellet with the poison sketch there for a moment! Thanks again. Quote Link to post Share on other sites
Gareth Davies Posted August 6, 2021 Report Share Posted August 6, 2021 Replacing fuel line along chassis- I have a TR4A 1966 where the copper fuel line from the tank (joined to tank fitting by short rubber hose jubilee clipped) runs through the chassis in a rubber hose)just below the diff mount and then out on to the opposite side of the chassis that the brake lines run along. Is this normal, all the posts I have read don't seem to mention this set up. Also I am finding it very difficult to pull the fuel through- have not used brute force yet. I have all the other pipes off. Anybody have any comments on this set up. i can only find a pictorial representation on the Moss website which appears different to mine gareth Quote Link to post Share on other sites
Ralph Whitaker Posted August 7, 2021 Report Share Posted August 7, 2021 On 3/19/2020 at 4:50 PM, BlueTR3A-5EKT said: History...according to the parts books, part numbers and originally supplied items I have had through my hands or sold when behind the counter. So do not shoot the messenger. TR2-3-3A-3B & some TR4 used a 5/16" tube pump to carbs. (H type carbs float chamber inlet pipes I guess is the controlling factor where push on connectors are used.) TR4-4A, TR250, TR6 Carb models used 1/4" tube pump to carbs. (Stromberg and HS types carbs float chamber inlet pipes being the controlling factor here - all using 1/4" push on connectors) Cheers Peter W Peter, Sorry to go back to this but I have 5/16 copper from the pump up to the carbs, but the inlet on the first float chamber is only 1/4, so have to really squeeze the rubber pipe up with a Jubilee clip. When the factory changed to push on rubber connectors did they reduce the diameter of the pipe from the pump, or have I got the wrong lid on the float chamber. Or did they use a stepped (reducing) rubber connector ?. Ralph. Quote Link to post Share on other sites
stuart Posted August 7, 2021 Report Share Posted August 7, 2021 12 hours ago, Gareth Davies said: Replacing fuel line along chassis- I have a TR4A 1966 where the copper fuel line from the tank (joined to tank fitting by short rubber hose jubilee clipped) runs through the chassis in a rubber hose)just below the diff mount and then out on to the opposite side of the chassis that the brake lines run along. Is this normal, all the posts I have read don't seem to mention this set up. Also I am finding it very difficult to pull the fuel through- have not used brute force yet. I have all the other pipes off. Anybody have any comments on this set up. i can only find a pictorial representation on the Moss website which appears different to mine gareth Front to back fuel line should be a short section of solid (steel or copper) pipe from the tank then a short rubber pipe to the main chassis pipe which should be solid up to the engine compartment where there is a short flexible pipe to the pump. Stuart. Quote Link to post Share on other sites
Gareth Davies Posted August 7, 2021 Report Share Posted August 7, 2021 Thanks Stuart- does run through the chassis at the back or over it in some way? Pity I cannot find a photo or a good line diagram to help me- never done this on TR before Also. I want to insert a fuel filter somewhere. The one fitted to mine ( a retro fit I suppose was on the line along the chassis near the front. I will probably try an fit it in the engine bay somewhere many thanks gareth Quote Link to post Share on other sites
stuart Posted August 7, 2021 Report Share Posted August 7, 2021 1 hour ago, Gareth Davies said: Thanks Stuart- does run through the chassis at the back or over it in some way? Pity I cannot find a photo or a good line diagram to help me- never done this on TR before Also. I want to insert a fuel filter somewhere. The one fitted to mine ( a retro fit I suppose was on the line along the chassis near the front. I will probably try an fit it in the engine bay somewhere many thanks gareth The Moss catalogue gives you a good idea of where it goes, If you tank is good and your fuel pump has the gauze in the bowl inlet then there shouldnt be any need for a filter, plastic ones are rubbish anyway and dont last long as well as being a fire risk if not sensibly located. Stuart. Quote Link to post Share on other sites
Gareth Davies Posted August 7, 2021 Report Share Posted August 7, 2021 Thanks, I will use more force to get the pipe out of the chassis and run it somwhere similar to the Moss catalogue once I have a closer look gareth Quote Link to post Share on other sites
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