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Richard Lorenz · 11-23-2018, 03:46 PM

Gary: Thanks for the pictures. The first figure is identical to the Moller drawing that I mentioned above. Even though it is from a 1932 Service Bulletin, it is wrong. The comp and main jets are not joined. The full picture has an Index on the left side which states that item "I" is the feed to the main jet, but the drawing shows it feeding the GAV.

The third figure (view from above) shows the location of I correctly. You can barely see "I" at the bottom of the picture. It is an unrestricted opening to the main jet, and is not joined to the GAV / Cap Jet System. Also, the Cap Jet is shown upside-down in the drawing.

I blew some air through some of the openings in one of my B carburetors. This blowing agreed with what I said above, but was not good enough to actually prove everything that I said.

11-23-2018, 03:46 PM	#11
Richard Lorenz Senior Member Join Date: May 2010 Posts: 447	Re: Zenith B Carburetor Diagram Gary: Thanks for the pictures. The first figure is identical to the Moller drawing that I mentioned above. Even though it is from a 1932 Service Bulletin, it is wrong. The comp and main jets are not joined. The full picture has an Index on the left side which states that item "I" is the feed to the main jet, but the drawing shows it feeding the GAV. The third figure (view from above) shows the location of I correctly. You can barely see "I" at the bottom of the picture. It is an unrestricted opening to the main jet, and is not joined to the GAV / Cap Jet System. Also, the Cap Jet is shown upside-down in the drawing. I blew some air through some of the openings in one of my B carburetors. This blowing agreed with what I said above, but was not good enough to actually prove everything that I said.