2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 227Get this manual
Bracket unit NOTE: To install the power tilt motor assembly and gear pump assembly, see "Assembling the gear pump" (7-39)10Fill the tilt cylinder with the recommended fluid to about 60Recommended power tilt fluid: ATF Dexron II
5Install new O-ring and the backup ring onto the tilt piston6Install the balls A, absorber valve pins B, and springs as shown7Install the plate D, washer E, and bolt to the tilt piston 6, and then tighten the bolt to the specified torqueT30
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11Install the backup ring and new Oring to the free piston L, and then install the free piston into the tilt cylinder IJ K