With your help something shows up using a N in place of the B too like you found using an E though no other letter suggests a engine model that's close like this.The model or serial number gives the year. In your model number, that B is a strange character. Normally it is an "E" for electric starting. So a J175EXETR would be a 1993 25" shaft motor.
The Crowleymarine site did not find your serial number either.