Listed below are 90 horsepower Johnson boat motors and parts.
Here are specs from the 2000 V-4 Johnson Motor:
Engine: 4 cylinders, V-4
Displacement:  105 cu. in.
Bore/Stroke:  3.60" x 2.59"
Fuel Induction:  Carburetor
RPM:  4500-5500 (wide open)
Weight:  319 lbs.
Gear Ratio:  2.0:1
Shaft: 20 inches