1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 348Get this manual
Outboard Hydraulic TiltTrim Shock Absorption System and Persons Safety What's Important? Shock Absorption system must always be ready to Absorb some Blows to the lower parts of the motorMotor must not Trim "In"
too far Suddenly
What Can Happen? Without Shock protection, Blow like this and Motor could break or Transom cou Id break away Motor may be lost overboard, and Boat may .S
At high boat speeds, Sudden trimming "in" too far and boat may dive under water or spin around
Make sure Manual Release Valve is closed tight(45-55 inIbs left Open motor has No shock protection