Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 272Get this manual
4Remove O-rings from cylinder5Remove filter 1Remove screw, oil pump, O-rings and check valve components from manifold
aO-ringsFilter
POWER TRIM SYSTEM DESIGN II
O-rings Oil Pump Screw Spring Check Ball
AWARNING
Oil pump from design type power trim system cannot be used on design I type power trim system