1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 329Get this manual
122122Remove five impact relief valve balls231 23Remove up relief valve241 24Remove the valve housing and washer from Discard the internal O-ring
the rod 18959
1251 25Remove and discard the quad ring and two backup rings261 26Slide the end cap off the rodDiscard the scraper1271 27 Remove the end cap rod backup ring and internal tilt rod
end cap seal28Clean 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