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Carburetor question

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  • Carburetor question

    I have a question about the secondary side of the carb. It is a standard marine Holley 600 with electric choke. The motor is running and idling good, but the back barrels don't seem to be opening up. I have taken the rpm's to 4000 on the trailer but still not opening. Not sure what is going on . Any help appreciated!!

  • #2
    They won't open up unless the engine is under load. You won't be able to get the vacuum low enough without doing some damage to your engine. If you are suspecting that they aren't opening, you will need to do an on the water test with the engine cover open or off to see.
    - Peter
    TANDEM AXLE PACKAGE - $950 DELIVERED WHEEL IMAGE
    5 14X5.5 T06 WHEELS W/5 ST215/75R14 KENDA LOADSTAR RADIALS SS CENTER CAPS, LUGS, MOUNTED, BALANCED & READY TO INSTALL

    PM or email me for tire, wheel or package pricing.
    CARBURETOR REBUILDING - $125 + PARTS
    LED lights, Chrome & Powder Coated Lugs
    2 LED 6" BRAKE LIGHTS DELIVERED $25

    tiresplease@gmail.com

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    • #3
      If the secondary diaphragm is bad, it won't open at all.
      - Peter
      TANDEM AXLE PACKAGE - $950 DELIVERED WHEEL IMAGE
      5 14X5.5 T06 WHEELS W/5 ST215/75R14 KENDA LOADSTAR RADIALS SS CENTER CAPS, LUGS, MOUNTED, BALANCED & READY TO INSTALL

      PM or email me for tire, wheel or package pricing.
      CARBURETOR REBUILDING - $125 + PARTS
      LED lights, Chrome & Powder Coated Lugs
      2 LED 6" BRAKE LIGHTS DELIVERED $25

      tiresplease@gmail.com

      Comment


      • #4
        I was thinking that but wanted to ask for sure. Thanks!

        Comment


        • #5
          Originally posted by Bluccous View Post
          I was thinking that but wanted to ask for sure. Thanks!
          No problem.......that's what this place is all about. Well, that and pictures.
          - Peter
          TANDEM AXLE PACKAGE - $950 DELIVERED WHEEL IMAGE
          5 14X5.5 T06 WHEELS W/5 ST215/75R14 KENDA LOADSTAR RADIALS SS CENTER CAPS, LUGS, MOUNTED, BALANCED & READY TO INSTALL

          PM or email me for tire, wheel or package pricing.
          CARBURETOR REBUILDING - $125 + PARTS
          LED lights, Chrome & Powder Coated Lugs
          2 LED 6" BRAKE LIGHTS DELIVERED $25

          tiresplease@gmail.com

          Comment


          • #6
            You can make them open up manually through the use of compressed air. See this link which is helpful in diagnosing your problem in the driveway.

            http://www.chevyhiperformance.com/te...ary_operation/

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            • #7
              also if your piont distance is off the timing will be off which doesnt give the cycle enough vacume to open the rear barrels, this was just set up von my boat. Mine was a quick fix in the rotar cap

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