Small Engines (Lawn Mowers, etc.): 15.5H.P. B&S.FUEL PROBLEM, engine model type, carburetor system

Question
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Followup To
Question - ERIC,MODEL 28N707  TYPE 0173-01 CODE 97051620 15.5 H.P. OHV
THERE IS NO FUEL PUMP, THERE IS A SMALL ELECTRICAL PLUNGER ON THE BOTTOM
OF THE BOWL, DONT KNOW IF THAT WOULD BE PROBLEM. SEEMS AFTER WE LET IT SIT TO WARM UP THAN PUT IN GEAR IT WILL JUST DIE.
THANKS CAL
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Followup To
Question - I HAVE A CRAFTSMAN 15.5 H.P. RIDING LAWN MOWER.
MY PROBLEM STARTED WHEN I LEFT GAS IN OVER THE WINTER. I STARTED IT AND FUEL WENT IN MY CRANKCASE
AND SPARKPLUG CYLINDER WAS FULL OF GAS. I CLEAN CARB. CNAHNGE OIL, THAN GOT IT TO RUN FOR A WHILE NOW IT STARTS AND WHEN YOU PUT IN GEAR IT ACTS LIKE NO FUEL IS GETTING IN. THAN I HAVE TO USE CHOKE TO STATRT AGAIN SAME PROBLEM.I PUT A SHUT OFF VALVE ON WHEN NOT IN USE.THE ENGINE WILL REV. UP AND DOWN. HOPE YOU CAN HELP ME.MODEL NO.917-258472 CRAFTSMAN 15.5 42INCH CUT
THANKS CAL
Answer -
I bet the problem is still in the carburetor.  Does the carburetor use a fuel pump and is there a brand name stamped on the carburetor, like Wal-Bro or Minkuni?

Almost all surging is caused by a leaky intake gasket or an obstruction in the carburetor system.
Let me know about the fuel pump and carb.
Eric
question: eric, thanks for reply where would the fuel pump be at do you have a schematic of the carb.?
Answer -
The fuel pump can be located in various places.

Follow the fuel line from the gas tank to the carb.  If the line goes directly to the carburetor, and there are no other fuel lines, then it does not have a fuel pump.

Some pumps are attatched the carb.  In this case you will find a vaccuum connected to the engine, usually the valve breather cover.

What is the engine model, type and code number?

Let me know.
Eric

Answer
Was there in thick, brown looking sludge in the carburetor?

As for the carburetor solenoid, it is used to prevent engine backfires.  When you turn the key off, power if removed from the solenoid and the plunger engages/extends and stops fuel from enter the high speed jet.  It sounds like the solenoid is working correctly.  If it were malfunctioning, then the mower would not start at all.

Do you have an air compressor?
Let me know about any sludge and the air compressor.
Eric