2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 100Get this manual
Cylinder head NOTE: Apply engine oil to the valve shims and valve lifters before installation Install the valve shims and valve lifters in their original positions4Install the camshaft (intake) and camshaft (exhaust) with the new oil seals 3 S1280B
E S6D85480 M
CAUTION:
Do not reuse the cylinder head gasket, always replace it with new oneNOTE: Apply engine oil to the cylinder head bolts before installation Tighten the M10 bolts to the specified torques in two stages first, and then tighten the M8 bolts to 14 Nm (1.4 kgfm, 10.3 ftlb) Make mark on the M10 bolts and the cylinder head, and then tighten the bolts 90 from the mark Tighten the M8 bolts to 28 Nm (2.8 kgfm, 20.7 ftlb)Cylinder head bolt (M10): 1st: 15 Nm (1.5 kgfm, 11.1 ftlb) 2nd: 30 Nm (3.0 kgfm, 22.1 ftlb) 3rd: 90 Cylinder head bolt (M8): 1st: 14 Nm (1.4 kgfm, 10.3 ftlb) 2nd: 28 Nm (2.8 kgfm, 20.7 ftlb)