Briggs stratton model 100000 sart problem ? - Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower

If you are having problems starting your mower you should check 3 things, air, fuel and spark.

Fuel: check to make sure you are full of good quality fuel, try to start the engine several times then take out the spark plug and it should look wet. If its not wet then you aren't getting fuel into the engine.

Air: remove and clean the air filter with clean gasoline if its made of foam. If its made of paper then you should buy a new one from a local auto parts or hardware store.

Spark: disconnect the spark plug wire from the spark plug and hold the wire close to the engine block. Try to start the engine and watch for a spark to jump between the end of the wire and the engine block. If it doesn't then either the wire is bad or the ignition coil is bad.

Reply to this solution when you find the problem and I can tell you how to solve it.