Four-Stroke Engine Lawn Mowers

• 1). Push and walk your new mower, with the engine off, onto firm and level ground. Always fill the gas tank and check the the oil crankcase reservoir while the mower is in this same off-state and level position. Use a designated funnel to prevent spilling of oil or gas onto the mower, yourself or the ground below.
  
  
• 2). Fill the engine oil reservoir on a four-stroke mower with clean, fresh engine oil of an appropriate weight for your make and model of mower, as recommended in your owner's manual. According to Penn State University, most mower engines will require roughly a 1/2 quart of engine oil, though this can vary. Fill to the "Full" mark on the oil gauge and not over or under this measure, for trouble-free operation.
  
  
• 3). Pour pure gasoline through a funnel into the fuel tank of your four-stroke lawn mower engine. Fill until the gauge registers "Full." Remove the funnel carefully and replace the gas tank cap, securing it by twisting or pressing.
  
  
• 4). Walk the mower at least 25 feet from where you filled it with oil and gasoline before starting the engine to prevent ignition of gas and oil vapors in the air or any spillage on the surface below.
  
  

Special Fueling Directions for Two-Stroke Engine Mowers

• 1). Mix the proper engine oil and gasoline in the proportions recommended for your two-stroke lawn mower engine it the owner's manual.
  
  
• 2). Place the recommended ratio of gas to oil in a fresh, clean gas can. Replace the cap securely and swirl the can gently for a minute or so to mix the two substances together. They will not commingle properly if poured directly into the gas tank unmixed, so do not attempt this short-cut.
  
  
• 3). Insert the funnel into the fuel tank opening and fill with the oil and gas mixture until the gauge reaches the designated "Full" mark, but no higher.
  
  
• 4). Secure the gas tank cap on the mower. Secure the gas can cap and label the gas can clearly for use with the two-stroke gas and oil mix to prevent it being mixed up with a gas-only can when used in the future.
  
  
• 5). Walk the mower at least 25 feet from where you filled it with oil and gasoline before starting the engine to prevent ignition of gas and oil vapors in the air or any spillage on the surface below.