FAQ SUPPORT

The most common cause for this failure is old/stale untreated fuel or perhaps a sheared flywheel key (ignition timing). If untreated fuel is more than a month old, this fuel will start to break down and engine stalling (in addition to fuel system component gumming) can result. That’s why it’s important to either drain the gas from your outdoor power equipment before it sits idle during the winter, or add a fuel preservative/stabilizer to the fuel.

For a typical example of how an engine may sound when it stalls due to lack of fuel flow, please listen to the following:

If you’ve got stale gas in your equipment, drain the gas from the fuel tank completely and dispose of it properly, following your local municipalities’ regulations. NOTE: In most cases, this older fuel can be added to your car's fuel tank with no harmful effects.

Sometimes removing the old fuel and replacing with fresh, treated fuel may just solve the problem. If not, drain the old fuel and spray the inside of the fuel tank and carburetor with some carburetor cleaner. Finally, remove any sediment from the fuel tank (see our "Servicing the Fuel Tank" FAQ) and add fresh, treated gas.

Another thing to consider is that certain equipment manufacturers place a plastic packing plug between the gas cap and gas tank. In order for there to be proper venting, ensure that this plug is removed.

If stale fuel is not at fault, next look at the ignition system. Did the engine suddenly stop after striking an object? If so, you likely sheared the flywheel key, which upsets the engine's ignition (spark) timing.

For related information regarding poor engine starting/performance, please visit the following FAQs:

• Quattro/Classic/Sprint engine hard starting/running rich

• Engine problem solving tips

• Engine won't start

• Engine does not start/runs poorly after storage

Your best source of information would be to consult your local Briggs & Stratton Authorized Dealer.

NOTE: Please read and abide by any applicable Safety Information (PDF) before performing any engine work. This information is not meant to take the place of work performed by a Briggs & Stratton Authorized Dealer. Terms and Conditions apply to all of our information provided on this website. Always be sure to read and understand your engine Operator's Manual.