That is the model number not the serial number.
How old is a Johnson 60 HP outboard motor serial G7050973
Johnson outboard motor Serial Number J2575938 Question What Year is this Motor and is it possible to get the Model Number
That is a 1956, 30HP Johnson motor.
The year model for a Johnson outboard is determined from the engine model number, rather than the serial number.
The year model for a Johnson outboard is determined by the "model" number, rather than the serial number.
The year model of a Johnson outboard engine is determined by "model number" rather than the serial number.
1070310
1986
Johnson outboards use the model number to determine the year model of their engines.
Johnson and Evinrude outboards use the model number, rather than the serial number, to identify the year model.
Check serial number on the left side of the motor where it bolts to the transom. Mine has a metal tag with model and serial number.