How Do I Replace a Briggs & Stratton 15 HP OHV Oil Seal?

Written by mark o'brien
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How Do I Replace a Briggs & Stratton 15 HP OHV Oil Seal?
Replace the oil seal on your 15 HP engine. (Man mowing image by xymm from

When your Briggs & Stratton OHV 15 horsepower engine begins to use excess oil and there is a greasy oil residue forming around the base of the engine block, there is a good chance that the oil seal between the oil pan on the base of the engine and the engine block is damaged and leaking. Replacing the oil seal is a quick job that will save you money on oil and prevent your engine from seizing up if it runs out of oil.

Skill level:

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Things you need

  • Socket ratchet
  • Socket set
  • Oil seal gasket
  • Flathead screwdriver
  • Inch-pound torque wrench

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  1. 1

    Flip the 15 HP Briggs & Stratton engine upside down so the crankshaft is pointing directly upward.

  2. 2

    Fit the correct sized socket on the oil pan bolts on the base of the engine, usually a 9/16 in. socket. Unscrew the eight oil pan bolts.

  3. 3

    Pull the oil pan off the crankshaft. You may need to use a flathead screwdriver to initially pry the oil pan off.

  4. 4

    Peel the old, worn oil seal gasket off of the oil pan.

  5. 5

    Put the new oil seal gasket on the oil pan. Slide the oil pan back on the crankshaft.

  6. 6

    Fit the socket onto the inch-pound torque wrench. Tighten all the oil pan bolts back into place with the wrench at 75 inch-pounds.

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