Yamaha F100B F100C Outboards Factory Service Manual, Page 275Get this manual
Clamp brackets (F100C) 4Inject grease into both grease nipples until grease comes out from the bushings a5Fully tilt the outboard motor up, and then support it with the tilt stop lever
WARNING
After tilting up the outboard motor, be sure to support it with the tilt stop leverOtherwise, the outboard motor could suddenly lower if the power trim and tilt unit should lose fluid pressure6Measure the trim sensor resistanceCheck the trim sensor if out of specificationTrim sensor resistance: Pink (P) Black (B) 238.8378.8 at 20 (68 F)