Why does my oil come out of my fuel pump on my riding lawnmower?

If oil is coming out of the fuel pump on your riding lawnmower, it could be due to a few reasons. One common cause is a faulty fuel pump, which may have internal damage or wear that allows oil to leak. Another possibility is an overfilled crankcase, causing excess pressure that pushes oil into the fuel system. Lastly, a damaged or worn gasket seal could also lead to oil leaking from the engine into the fuel pump.