howard, on my 42 f30 that fitting under the carby goes to the vacume wipers
If yours had crankcase ventilation fitted there should be a sandwich plate between the carby and the manifold,with a brass fitting coming out at right angles and down the side of the manifold .
The fitting is about two inches long and i suppose you would call this a valve,which has a pipe that runs along to the front of the manifold and tucks in behind the generator mount to fit on a nipple there.
there is a diagram in MBF1 on page c-5 fig 6 on the operation of this,I hope this helps.
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kenney
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