2001 Mercury Mariner 50-60HP Factory Service Manual, Page 26Get this manual
MAINTENANCE
Checking Power Trim Fluid
1Tilt outboard to the full up position and engage the tilt support lock
aTilt Support Lock 2Remove fill cap and check fluid levelThe fluid level should be even with the bottom of the fill holeAdd Quicksilver Power TrimSteering FluidIf not available, use automotive (ATF) automatic transmission fluid
aFill Cap
Fuel System