i bought a 1986 larson senza it is powered by a 1986 johnson 140 horsepower . the transom bracket says J140TLCDC .i took the engine cover off and it looks like a new power head on it . it is stamped CJ120TLCOS and under that it is stamped G7025226 . spark plugs are QL77JC4 . no oil injection anymore . wide open throttle it only turns up 4200RPM . the prop is a 21 pitch . can someone out there tell me what this motor might be ? .thankyou .