1997 Johnson Evinrude "EU" Accessories Service Manual, P/N 507270, Page 147Get this manual
dLubricate a-rings of check valve to be tested and install valve in ave Tester, PIN 390063Torque valve to 50-60 inIbs(5-7 Nm)Use Stevens Pressure Tester NoS-34 to pressurize valve to 30 PSI (207 kPa)If leakage is indicated, submerge tester in water to identify source
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39Using ave Trim Cylinder End Cap Remover, PIN 324958, and breaker bar, remove both of the trim cylinder end caps
40Remove the outside seals from the trim cylinder end capsThere is an a-ring and back-up ringone of two different designsNewer nylon seals will be continuous ring of nylonOlder seals are split
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41Using smooth flat tool, remove the scraper from the trim end capPry the scraper out of the groove in the end capDiscard the scraper42Using the same smooth flat tool, remove the a-ring from the end capsDiscard the a-ringsClean both end caps and scrape all corrosion or loose paint from the threads in the outside O-ring area43There are two different types of seals in the trim end capsThe one pictured on the left is an a-ring The one pictured on the right is quad-ring The quad-ring is used for service