2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 36Get this manual

2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 36

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Power unitControl system Water temperature 5862 (136144 F) above 70 (158 F) Valve lift 0.05 mm (0.0020 in) (valve begins to lift) more than 4.3 mm (0.17 in)

Digital tachometer: YU-39951-B