1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 191Get this manual
Pressure Leakdown Test Before servicing hydraulic unit, it should be pressure tested to determine the unit's malfunctionThis test must be performed with the hydraulic unit removed from the engine and mounted in vise or holding fixture
OIVIC Power TrimlTilt Service Kit, PI 434524, allows external verification of trimltilt operation and component condition The "A" adapterPI 336658, checks operation of the UP circuit The "B" adapterPI 336659, checks operation of the DOWN circuit'1_
This kit does not include gauge and collar assemblyGauge and collar assembly shipped with OIVIC Power TrimlTilt Service Kit, PI 390010, will workA Gauge and Collar Assembly, PIN 983975, is availableBe sure to use fully charged battery
1Screw the manual release valve until it is seated
in the hydraulic unit
2Operate the unit to the full up positionthen jog the unit down to reduce pressureLoosen the reservoir cap one full turn Loosen the manual release valve three turnsSome fluid will bypass the reservoir capThese steps will relieve the pressure in the unit