Need to replace the shaft and brass gear, part # 56159ma
Your motor is a 1955 model.
The FD 16 A is a 1962 model 18 Hp motor.
That particular model was made in 1975. Put the model number in on google and you will find all the info you need on that motor
your Johnson is a 1985 year model
2004
After the motor is burnt you can !
6420800
Airstream motor home models first launched in 1974. Skydeck model was first model to feature interior stairs featuring to the motor home.
Johnson outboards use the model number to determine the year model of their engines.
The year model of an Evinrude outboard cannot be determined from the serial number, but rather from the model number.
You need to specify a model and model year, and also keep in mind that there was probably more than one motor option for that model year.
A 15804b is a 1978 motor.