2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 101Get this manual
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Power unit
S6D85520
Cylinder head cover bolt: 1st: Nm (0.8 kgfm, 5.9 ftlb) 2nd: Nm (0.8 kgfm, 5.9 ftlb)
9 Install the sprockets and timing beltS6D85510