1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 344Get 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 "I nil too far Suddenly
What Can Happen? Without Shock protection, Blow like this and Motor could break or Transom could 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 aroundHow Can Possible Conditions Be Minimized? Read, Understand, and Follow manufacturers InstructionsFollow warnings marked"