1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 346Get this manual
73 12935
173 52Remove and discard the seals from the trim pistonsCarefully clean the trim pistons and rods and install new seals
174 53Using OMC Trim Sleeve Remover, PIN 325065, pry the
trim sleeves from the manifoldWhen removing, rock the sleeve back and forth with your fingers while prying with the tool
175 54Inspect the cylinder bore of each of the sleeves for
scoringReplace the sleeves if scuffed or grooved
COA2488
176 55Remove the seals from both trim sleevesClean 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 componentsAssembly