1997 Johnson/Evinrude EU 25, 35 HP 3-Cylinder outboards Service Manual, Page 81Get this manual
OJ 5Place the oil outlet valve into the oil inlet housing
Secure it with new O-ring seal
6Install new oil inlet valve
7Place new O-ring into the groove in the oil pump cover
BPosition the oil pump cover with the area facing the oil inlet valve Install the cover and secure with two smaller screws Tighten the screws to 5-7 inIbs(0,6-0,B Nm)