F_R said:Those numbers don't help. Look for a nickle-size unpainted freeze plug on the powerhead with numbers stamped on it. Some have model and serial and some only have serial #
If both the model plate and plug are missing, the motor is probably stolen. Crooks know to remove both.
You can go to "www.old-omc.de" without the quotation marks) for pictures of original sales brochurs and compare style and trim/decals till you find yours.