Suzuki DF25/DF30 Four Stroke Service Manual, Page 208Get this manual
POWER TRIM AND TILT
SERVICE PROCEDURE
OIL LEVEL
To 12345check the oil levelRaised the engine to full-tilt positionLower the manual tilt lock lever 1Remove the oil filler plug and oil level plug 3If oil can be seen at level plug hole level, the unit is fullIf oil level is low, refill with the recommended oil
Recommended oilDexron automatic transmission fluid or equivalent