1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 328Get this manual
TroubleshootingGauge Set, PIN 390010 The OMC Pressure Gauge Set, PIN 390010, allows external verification of trimltilt operation and component condition The "A" adapter, PIN 395618, checks operation of the UP circuit and all components listed on Page 9-44 The "B" adapter, PIN 395619, checks operation of the DOWN circuit and all components listed on Page 9-45Tests must be made with the hydraulic unit removed from the engine and mounted in OMC Test Stand, PIN 390008
O-rings on end of adapters can wear out during normal useUse O-ring, PIN 332930, as replacementUse an adhesive such as Loctite Black Max or Dupont Krazy Glue to secure the a-ring to tip1Install hydraulic unit in OMCTest Stand, PIN 390008