Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 455Get this manual
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POWER TRIMDESIGN II
6 Reinstall fill plug7 Run trim "UP"8 Disengage tilt lock lever9 Open valve (f) and close valve (g)10 Run trim "DOWN"Minimum pressure should be 600 P.S.I(42 kgcm2)11 Tilt out