F-12 fuel level

Fritz Maurer · Mar 18, 2019

The I-T book says, " fuel level to be 23/32 inch below the bottom of the upper body." But it does not give any information on how to arrive at this figure. Would appreciate hearing some ideas. Thanks, Fritz

FBH44 · Mar 18, 2019

That number rings a bell, I think in rebuilding the carb for my H there was a paper gage with 27/32 marked on it, as a gage to set the carb float height. There might be such a gage in the rebuild kit for your carb. BTW, the float for my H was already set at 27/32, so I didn't have to mess with it. To use the gage, as I remember I set the carb body upside down, with the float sitting there, and it was sitting at 27/32 above some other part.... don't remember exactly.

Steve@Advance · Mar 18, 2019

I believe what they are saying is to assemble the float, needle/seat, and gasket to the upper housing.

Turn it upside down with the float resting on the needle valve, measure from the bottom (which is now the top since it's upside down) of the float pontoons to the gasket.

It will probably already be real close unless the float was replaced.

Another clue will be the "water mark" line on an old float. It should be parallel to the gasket surface when resting upside down.

T.R.K. · Mar 18, 2019

I'm going against the grain on this one.

I think you connect a clear hose to the carb. bowl drain with the carburetor assembled on the tractor. Then hold it up beside the carburetor and measure down from the seam between the top and bottom to measure the actual fuel level.

F-12 fuel level

Fritz Maurer

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FBH44

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Steve@Advance

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T.R.K.

Well-known Member

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