Suzuki DF 25 Service Manual page 223

9-18 POWER TRIM AND TILT
MANUAL RELEASE CIRCUIT (MANUAL VALVE)
Operation:Turn manual valve maximum three (3) full turns counterclockwise.
When the manual valve is loosened, oil will flow unimpeded (without resistance) through the internal pump
tubes, thereby facilitating manual tilting or lowering of the outboard. To hold the engine in a selected position,
the manual valve must be closed again.
: Tilt up
: Tilt down
Manual release valve
Tilt rod
Piston
"UP" pressure main check valve
Upper cylinder chamber
Lower
cylinder
chamber