1985 long shaft
Usually the serial number is on a tag mounted on the bracket that holds the outboard engine to the boat.
According to the Yamaha guide, the outbound serial number is located on the label in the clamp bracket. The serial number is helpful when replacing your motor.
I HAVE A OUTBOARD C150ztXRU
235386
216793
40tlru is the model number for a 1996 2-stroke, oil-injected, 40hp Yamaha outboard boat motor, not a serial number and not for a motorcycle.
1979/1980
1981
2005
you can't
It is a 2003 4-stroke outboard
Yamaha 8B starting in 677 is a 1979 model. That makes it 30 years old in 2009. Regards Steve