1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 167Get this manual
8Remove and discard O-rings from pumpMark gerotor assembly
9Inspect oil pump components for contamination, excess wear, or damage
10Remove two screws retaining the exhaust tubeRemove tube and gasketDiscard gasket11Remove eight nuts and lock washers retaining sump to powerhead Remove sump and gasket, discard gasket12Inspect oil sump for damage