1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 332Get this manual
16Place the ball of the down relief valve in the manifold17Install the down relief valve guide and spring18Oil and install two new pressure port a-ringsf18l19Install the pump assemblyThe pump assembly must be drawn down evenlyTorque the screws to 25-30 inIbs(3-4 Nm) [!!] 20Install the drive coupler20 121 Install the filter,18888A