2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 120Get this manual

2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 120

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Timing belt and sprocket
S6AG5H80

S6AG5A50

S6AG5B25

CAUTION:
Do not turn the crankshaft counterclockwise more than 90 Otherwise the piston and valves