I am confused.  Are you using the original pressure tank, or has it been converted to single line/fuel pump?   You speak of pumping up the “bulb” which would indicate the single line system, but I see the double line connections.  In any event, there is an issue if you must pump the primer bulb/button continuously.  That manifold pressure line looks oversize and leaking at the connection.  You should not need one of those worm clamps if the line connection is a good fit.  Keep in mind that a poor pressure line connection or leak will also cause the engine to idle lean…

OK, see that picture now, confused by the original two line connector.

David Bartlett wrote:

Cheap fuel pumps will cause all sorts of troubles. Spend the money and get the right one.

Exactly, and use the proper bypass cover also.  That cover is flat on the inside, so does not direct the fuel charge into the ports very well.  Use the proper fuel lines, and seal off that pressure port properly.

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seakaye12