1976 Evinrude 200 HP Outboards Service Manual, PN 5199, Page 177Get this manual
TROUBLESHOOTING THE HYDRAULIC SYSTEM (CONT
Trimstilts down too slowly
Check reservoir oil level
Determine (by listening) if motor is operating at or near normal speed
Motor running at normal speed
Motor not running at normal speed
Install pressure gages at locations 1,3; run in down direction and read
Follow Chart D
No pressure reading on gage3
Pressure readings at location #1#3 Pressure locationlower than at #1