Originally Posted by BarelyAWake
Using the fuel petcock to stop fuel flow before shutting down the engine can cause a lean condition and reduce the amount of available lubrication, which can contribute to premature wear and difficulty starting.
Personally, I'd just shut off the fuel after engine shutdown, choke or otherwise.
Please do tell.... how can closing the fuel valve be a detriment to the engine. If you notice, the engine is still running, draining the bowl of some fuel (releasing pressure on needle and seat), then I shut the engine down using the kill switch. Never said it ran out of fuel.
Look at the thousands of dollars spent on outboard engines, shutdown, pull the fuel hose and burn up what fuel is left in the carburetor. Although it's better to remove the drain plug in the carburetors to drain fuel after the engine is stopped..