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.
Flip the 15 HP Briggs & Stratton engine upside down so the crankshaft is pointing directly upward.
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.
Pull the oil pan off the crankshaft. You may need to use a flathead screwdriver to initially pry the oil pan off.
Peel the old, worn oil seal gasket off of the oil pan.
Put the new oil seal gasket on the oil pan. Slide the oil pan back on the crankshaft.
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.