1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 329Get this manual
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23Remove five impact relief valve balls24Remove up relief valve
25Remove the valve housing and washer from the rodDiscard the internal O-ring26Remove and discard the quad ring and two backup rings27Slide the end cap off the rodDiscard the scraper
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28Remove the end cap rod backup ring and internal tilt rod end cap seal18959
29Clean the manifold thoroughly in fresh solventBlow excess solvent from the internal passages with compressed airIt is essential that the manifold and all components be kept absolutely clean and dust freeAny dirt in the system could cause scoring of cylinder bores, sticking valves, or damage to pump components