To perform a Johnson Evinrude serial number lookup, you can use the following resources:

Occasionally, manufacturers change a part mid-year. In these "mid-year breaks," the serial number is the only way to know which version of a water pump or carburetor kit you need. Digital Lookup Tools

Download a vintage “OMC Model Number Reference” (available as PDFs online). Match your model number prefix to the year.

Remove the cowling (latches or screws). Step 2: Check the transom bracket first. Write down EVERY number and letter. Step 3: If no tag, look for the freeze plug (a dime-sized circle) on the cylinder block. Step 4: Write the number in a notebook. Take a photo with your phone. Step 5: Distinguish the Serial number (usually says "S/N" or "Ser No") from the Model number (usually says "Model"). Step 6: Use the Model number and the Letter-to-Year chart above to guess the year first. Step 7: Go to MarineEngine.com and punch in the Serial number. Step 8: Compare the database result to your manual guess. They should match.

Several free and paid websites maintain Johnson/Evinrude databases:

Model E150STLCEM – the "LC" means 1991? No – "L" is 1991, "C" is 1988 – that doesn’t work. Correction: The year is the last two letters before the final suffix. In E150STLCEM , the year code is LC ? That is impossible. Let’s simplify: The most reliable method is to use online decoders, but generally, after 1980, the two digits or letters immediately preceding the final suffix indicate year. When in doubt, skip manual decoding.

Once you have your model number, you can use these official and reputable resources to find diagrams and replacement parts: Evinrude Johnson outboard model number location

Johnson was phased out completely by 2003. If you have a "Johnson" after 2003, it is either a rebadged Evinrude or a counterfeit.

If the identification tag is completely missing or destroyed: Physical Features