1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 352Get this manual
Remove and discard the seals from the trim pistonsCarefully clean the trim pistons and rods and install new seals
I,;l 53Using OMC Trim Sleeve Remover PI 325065, pry the trim sleeves from the manifoldWhen removing, rock the sleeve back and forth with your fingers while prying with the tool
Inspect the cylinder bore of each of the sleeves for scoring Replace the sleeves if scuffed or groovedCOA2488
55 Remove the seals from both trim sleeves Clean the
sleevesOil and install new seals on the sleeves, as shown
56Remove the manifold from the holding fixture and clean 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 free Any dirt in the system could cause scoring of cylinder bores, sticking of valves, or damage to pump components Assembly