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supercub

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Posts posted by supercub

  1. I reset the float and gas still comes out of the accelerator tube when the carb is tilted slightly. I think the flat sealing float valve that came with the kit is a bad idea. The fuel level must be way too high. I will replace it with a regular taper point needle float valve. Do you have any brand recommendations?

  2. I bench tested my carburetor with a small gas tank to feed it. It doesnt leak while sitting flat but if I tilt it up 15 degrees as if the car was going uphill, gas flows out of the throat accelerator tube nozzle. I ultrasonic cleaned all of the parts and assembled with new float valve assembly, pump plunger and gaskets. I set the float height according to the kit instructions. The Delta kit has a flat rubber float valve seal as opposed to a pointed float needle.

    The accelerator pump works. I found info on the older Carter W1 carbs and it stated that the accelerator had an overbleed feature that would allow some extra fuel to flow after acceleration.

    Perhaps I should check the fuel level? Carbking do you know what the level should be? Or have any ideas why the fuel would flow out of the accelerator nozzle at a slight incline? 

  3. The metering rod on my carb is attached to a linkage that has a spring plunger on it that goes into the float bowl. The rod is normally held upward by the spring pressure. The rod should  Be down into the jet at lower speeds, does vacuum pull the plunger down? The pin on the linkage would pull it up if it wasnt held up by the spring. The 2nd picture shows the rod control tab above the linkage pin.

     

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    1D3C838A-BC1B-42F3-A4FF-9231FCD70D87.jpeg

  4. I am rebuilding my frozen heat riser system. The vane blocks off the last three cylinders' exhaust and routes it thru the heat riser block under the carb. How much preload in the cold state should the thermo spring have? I can push with my finger through the manifold on the vane at its closed position, should there be a firm resistance? Just trying to gauge how firm it should be before I reassemble. It opens up with some heat from a heat gun.

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