1998 Johnson Evinrude "EC" Accessories Service Manual, P/N 520213, Page 178Get this manual
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10Remove nut, two washers, shim (if present), and a-ring11Remove the spool valve12Carefully, pry the spool valve seals off each end13Remove and discard two spool valve housing a-rings
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14Remove three a-rings from the cylinder rod bore of the housing and discard12980
15Clean the cylinder, housing, and components in clean solventBlow dry using compressed air with less than 25 PSI
It is important to keep all components free of dust and dirt during assemblyLightly oil all components and a-rings with OMC Power TrimlTilt and Power Steering Fluid or GM Dexron I fluid16Install three new a-rings in the cylinder rod bore of the housingThe a-rings (0.734 0.103 in are in separate package labeled "913327"17Install two new a-rings in the spool valve bore of the housingThe a-rings (0.734 0.139 in are in the package labeled "912357"The a-rings should be installed in the grooves just inside the seals