OMC Model Year Chart
Embedded in the model number is the Make, horsepower and year of the
engine. For example: (using the chart below)
If your model number is J200TLCOS
your engine is a 1985 200hpJohnson
The first Letter corresponds to the first letter of the
make of your engine.
The next numbers are the engine horse power.
The second to last two letters correspond to the
year listed in the chart below.