need help identifying motor

randyray41

Petty Officer 2nd Class
Joined
May 31, 2011
Messages
123
I recently purchased an Yamaha 175 hp motor. I was told it's a 1987 model. The model and serial number are missing from side of motor. Is the serial number located on the motor in another place? How can I be for sure this is a 1987 model? The plugs, NGK BR8hs-10, are in the motor now and that plug crosses to several different motors as well as the 1987 175hp, 2.6L motor.

Thanks for any help.
 
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