1997 "EU" Johnson Evinrude 5 thru 15 Four Stroke Service Manual, P/N 507262, Page 201Get this manual
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17Inspect oil pump components for contamination, excess wear, or damage
uru 18Loosen clamp and remove oil pickup tube and filter1201
19Remove four screws retaining the pressure relief valve housingRemove housing20Remove spring and valveDiscard gasket21Inspect valve housing, spring, and valve for excess wear or damage