This may be a fuel delivery problem. To check, remove the fuel line going to the carburetor of your Briggs and Stratton engine, using a pair of pliers to remove the spring clamp that holds the rubber fuel line hose to the carburetor. Make sure fuel is freely flowing from the fuel line. If not, check to see if something is blocking the line. It could also be a clogged fuel filter, so this would be a good time to replace the filter if itâ€™s an inline type (an inline fuel filter will look like a small cylinder connected somewhere along the fuel line).
Another consideration is how old the gas is. If itâ€™s been sitting in the tank for more than a couple of months, the gas may have degraded. One way to tell this is by smell- old gas will have a â€œsourâ€ or â€œold varnishâ€ smell. Another way to tell is by looking at itâ€”old gas will be noticeably darker. Try comparing a sample of the older gas to a sample of fresh gas in clear glass containers to see if you can detect a color difference. If so, drain the old gas and add fresh gas. Next time your Briggs and Stratton engine will be stored with gas in the tank for more than a month or two, try adding fuel stabilizer to prevent oxidation, the biggest enemy of gasoline. The stabilizer needs to be added to fresh gasâ€”it doesnâ€™t fix old gas, it just slows down the oxidation process.
You can find the model and serial numbers located on your Briggs & Stratton small engine typically in one of these areas: