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Why does a Briggs and Stratton 4.5 HP lawn mower engine stop one minute after it starts?

Reason 1: Spark plug problems.

- Spark plug gap too wide or too narrow: Check the spark plug gap and adjust it to the manufacturer's specifications.

- Spark plug wire damaged or loose: Inspect the spark plug wire and make sure it is securely connected to the spark plug and ignition coil.

- Spark plug fouled: Clean or replace the spark plug if it is fouled with carbon deposits.

Reason 2: Fuel issues.

- Clogged fuel filter: Clean or replace the fuel filter if it is clogged or dirty.

- Fuel line kinked or blocked: Inspect the fuel line and make sure it is not kinked or blocked.

Reason 3: Carburetor issues.

- Dirty or clogged carburetor: Clean the carburetor according to the manufacturer's instructions.

Reason 4: Air intake issues.

- Dirty or clogged air filter: Clean or replace the air filter if it is dirty or clogged.

Reason 5: Loss of compression.

- Worn or damaged piston rings: Check the piston rings and replace them if they are worn or damaged.

- Leaking or damaged head gasket: Inspect the head gasket for leaks or damage.

Reason 6: Electrical Issues

- Faulty ignition switch: Test the ignition switch and replace it if it is faulty.

- Loose or corroded electrical connections: Check all electrical connections and make sure they are tight and free of corrosion.

Reason 7: Governor Issues

- Faulty governor: Check the governor for proper operation. Clean the governor linkage and make sure it is properly adjusted.