Small Engines (Lawn Mowers, etc.): Husqvarna rider w/B&S engine shuts off, husqvarna rider, briggs stratton

Question
Husqvarna riding mower has a 23 hp Briggs & Stratton Intek V-Twin engine. Runs somewhere between 15 mintues to an hour then abruptly hesitates/sputters and stops. Might be able to restart after a minute or two working the choke.  Then, might run short time (10-15 minutes) or longer (up to around 30-45 minutes) and shut down again.  Or, on the warm engine re-start engine will immediately cycle/hunt a few times then shut down. After engine has cooled, it easily starts and will run for another 30 minutes or so with no problem but then shuts down again.  Is something overheating, causing it to shut down? Thinking there might be a vapor lock, I've loosened/opened the gas cap a few times while mowing, but it will still shut down.  Also, in experimenting, I've set a concrete block on the seat and let it run with the blade on and it runs forever with no problem (I stopped in at 1-1/2 hours).  So, it seems the problem occurs only when the transmission is engaged (hydrostatic trans).  Any thoughts on what the problem could be. Does Husqvarna have a problem with some sort of switch or other component apart from the engine that would shut it down.  It has a new air filter, pre-cleaner, plugs, and fuel filter.  Shop tells me the engine, plugs, ignition coils, etc., check out OK and they can't get it to shut off for them (because they ain't riding it!).

B&S Intek V-Twin Engine Model:  445577,  Type: 0755E1, Code 061205Y-G

Thank you for your time -

Ron


Answer
Ron

Sounds like you have a leak somewhere in the fuel lines or a gasket is letting air in the engine. Check to make sure all gaskets are running When you put a load on this It is starving for fuel and not run correctly Which means no fuel is getting to the carburetor to let the engine run.