- 1). Remove the oil drain plug on the engine with the crescent wrench, and allow all the oil to flow out into the oil drain pan. The drain plug is either located on the bottom of the oil dipstick or on the base of the oil pan under the engine. Tighten in the drain plug once all the oil has drained out.
- 2). Flip the Briggs & Stratton engine on its top, so that the PTO shaft is pointing up.
- 3). Fit the proper sized socket on each of the 6 to 8 bolts holding the oil pan onto the base of the engine block, and unscrew them all.
- 4). Pull the oil pan off the PTO shaft. Set the oil pan flat on a table the way you pulled it off. Position the flathead screwdriver against the small, circle-shaped PTO seal in the center hole of the oil pan. Hammer against the screwdriver to push the PTO seal out.
- 5). Flip the oil pan over and set the new PTO seal in the center hole of the oil pan. Lightly tap the PTO seal into the oil pan hole with the rubber mallet.
- 6). Pull off the old oil pan gasket and place a new one on the oil pan. Slide the oil pan back onto the PTO shaft.
- 7). Finger-tighten all the bolts back through the oil pan into the engine block. Put the correct socket on the foot-pound torque wrench and tighten each bolt back in at 15 ft-lbs. Tighten the bolts back in in a pattern to properly seal the oil pan on: tighten one bolt to 15 ft-lbs., then tighten the bolt on the opposite side of the oil pan to 15 ft-lbs. Continue in this pattern of "opposite tightening" until each oil pan bolt is tight.
- 8). Flip the engine right side up. Add SAE 30 oil to the oil dipstick hole until the oil reaches the full line on the dipstick.
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