Suzuki outboard motors 1988 2003 repair manual., Page 334Get this manual
9-8 TRIM AND TILT fuse to prevent large current draws from damaging the systemIf this fuse is blown, the system will cease to functionThis is good indicator that you may have problems elsewhere in the electric systemFuses don't blow without causeAfter inspecting the electrical side of the system, check the hydraulic fluid level and top it off as necessaryRemember to position the motor properly (full tilt up or down) to get an accurate measurement of fluid levelA slight decrease in the level of hydraulic fluid may cause the system to act sporadicallyFinally, make sure the manual release valve is in the proper positionA slightly open manual release valve may prevent the system from working properly and mimic other more serious problemsJust remember to check the simple things firstIf these simple tests do not diagnose the cause of the problem, then it is time to investigate more deeplyPerform the hydraulic pressure tests in this section to determine if the pump is making adequate pressureInspect the entire power trimltilt electrical harness with multimeter, checking for excessive resistance and proper voltageTESTING
External Pump
ISee Figuresand 3
Early tiltltrim system tests used pressure gauge connected directly to the pumpWhile this method was adequate, later tests use more system oriented approach and connect pressure gauge inline between the pump and the cylinders 05009G10
Fig1 Pressure gauge connection points-DT115 1993 and later DT75 and DT85
and DT140 and