How Do I Change the Oil in My Quantum 4 Horse Power Briggs & Stratton Lawnmower?

The Briggs and Stratton Quantum engine is a vertical shaft four-stroke lawnmower power supply capable of providing years of service. Maintenance requirements are few, and simple tools and procedures are all that is needed to keep the engine in good condition. Manufacturer recommended repair centers offer this maintenance service, but you can save time and money by performing this simple task on your own.

3/8-inch drive ratchet
6-inch extension for 3/8-inch drive ratchet
Shallow drain pan
Rags or paper towels

Instructions

- 1
  Start the engine and allow it to warm up for a few minutes to aid the draining process. Shut the mower off and clean the area surrounding the oil fill cap, and the cap to avoid introducing debris into the crankcase.
- 2
  Remove the spark plug wire from the spark plug, and secure it to the engine block away from the spark plug. Place the drain pan alongside the mower, near the oil fill hole.
- 3
  Lay the mower on its side opposite the air filter, with the oil fill hole directly above the drain pan. Clean the area surrounding the engine crankcase plug under the mower deck. Remove the plug with a 3/8-inch ratchet and extension.
- 4
  Replace the crankcase drain plug after the oil stops draining. Stand the mower upright, and fill the crankcase with oil. Replace the oil fill cap, and restore the spark plug wire connection.

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