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    Petrol in the vee

    Thought I would spin my engine a few times without the choke so it wouldn't fire to get a bit of oil around it and finished up with a small amount of petrol in the vee. Is this a sign of a problem or just me flooding it?
    John.

    #2
    Providing your overflow pipes are in place and working, flooding fuel shouldn't end up in the Vee.

    Comment


      #3
      What version of the Stromberg carbs are fitted? The overflow pipes are on the later version with the yellow temperature compensatory fitted.

      The earlier version has no compensatory and no overflow pipes. If they start too flood the fuel ends up in the air filter and in to the Vee. They are a fire risk, get rid and replace with the later versions.

      I am aware of this as I had a very close call in our Stag many years ago. Fuel was pouring out all over the exhaust pipes at the rear of the engine. Only thing that saved us from a fire was the fact the engine hadn't fully warmed up at that stage of the journey. The carbs were promptly dumped and the later versions installed

      Bruce
      1973 GT6 Mk3 Pimento Red
      1974 Stag MOD,3.45 diff,French Blue, Fiat seats, Belt EWP, H/Tank

      Comment


        #4
        Check the petrol pipe connection to the carbs. The carb inlet tubes are parallel sided and small in diameter compared with most filters, t-pieces etc and when the petrol hose ages and becomes brittle those connections are prone to leak. Ethanol in fuel may have made it worse. I just re-fitted my carbs with the old tubing that was replaced about 6 years ago and one of the connections leaked badly. I had to tighten the pipe clamps way more than usual to seal them.

        Comment


          #5
          O-ring in one, or both, of the float bowl plugs?
          Dave
          1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.

          Comment


            #6
            Originally posted by Rubce View Post
            What version of the Stromberg carbs are fitted? The overflow pipes are on the later version with the yellow temperature compensatory fitted.

            The earlier version has no compensatory and no overflow pipes. If they start too flood the fuel ends up in the air filter and in to the Vee. They are a fire risk, get rid and replace with the later versions.

            I am aware of this as I had a very close call in our Stag many years ago. Fuel was pouring out all over the exhaust pipes at the rear of the engine. Only thing that saved us from a fire was the fact the engine hadn't fully warmed up at that stage of the journey. The carbs were promptly dumped and the later versions installed

            Bruce
            Thanks Bruce. The car is a late model, 1977 but I'm not sure about the carb version. Will take off the air filter and see what I can see. John

            Comment


              #7
              Originally posted by MikeParker View Post
              Check the petrol pipe connection to the carbs. The carb inlet tubes are parallel sided and small in diameter compared with most filters, t-pieces etc and when the petrol hose ages and becomes brittle those connections are prone to leak. Ethanol in fuel may have made it worse. I just re-fitted my carbs with the old tubing that was replaced about 6 years ago and one of the connections leaked badly. I had to tighten the pipe clamps way more than usual to seal them.
              The fuel pipes are the push fit types but I fitted fuel pipe hose clips a while back which stopped a slight air leak. Will check those again. Thanks John

              Comment


                #8
                Originally posted by DJT View Post
                O-ring in one, or both, of the float bowl plugs?
                +1. Had that happen also!

                Comment


                  #9
                  Originally posted by Stag About Town View Post

                  Thanks Bruce. The car is a late model, 1977 but I'm not sure about the carb version. Will take off the air filter and see what I can see. John
                  Hi

                  You don't need to remove the air filter box to view which type of carbs are fitted. The yellow temperature compressors if fitted are visible on the side of each carb.

                  Regards

                  Bruce
                  1973 GT6 Mk3 Pimento Red
                  1974 Stag MOD,3.45 diff,French Blue, Fiat seats, Belt EWP, H/Tank

                  Comment


                    #10
                    Originally posted by Rubce View Post

                    Hi

                    You don't need to remove the air filter box to view which type of carbs are fitted. The yellow temperature compressors if fitted are visible on the side of each carb.

                    Regards

                    Bruce
                    Thanks Bruce. I have got the ones you are talking about with the yellow compressors.. Just took the air filter off so I could see all the connections. Tried turning the ignition on to operate the pump and prime the carbs but still can't see where it leaked from. Would have thought that with fuel in the float chambers they would have leaked from the plugs if the O rings were the cause ? John

                    Comment

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