Ever stumbled across an old Evinrude outboard motor and wondered just how old it really is? Determining the year of manufacture can be crucial for finding the right parts, understanding its value, and even just satisfying your curiosity. The good news is that Evinrude, like many manufacturers, used a serial number system to encode this information. Decoding that serial number is the key to unlocking the motor's history.
Why Knowing Your Evinrude's Year Matters
Knowing the year of your Evinrude isn't just about bragging rights at the lake. It's practical for a number of reasons:
- Finding the Right Parts: Outboard motors evolve over time. Parts that fit a 1970 Evinrude likely won't work on a 1985 model. Knowing the exact year ensures you order the correct components for repairs and maintenance. This is especially important for older motors where parts availability can be limited.
- Accurate Maintenance: Service manuals are specific to certain year ranges. Using the wrong manual can lead to incorrect maintenance procedures, potentially damaging your engine. The correct year helps you find the service manual tailored to your motor's specific design and features.
- Determining Value: The age of an outboard motor is a significant factor in determining its value. A newer motor, even in similar condition to an older one, will generally be worth more. Knowing the year helps you accurately assess the motor's market value if you're buying or selling.
- Historical Significance: For some, the appeal is purely historical. Evinrude motors have a rich history, and knowing the year connects you to a specific era of boating and engine technology. It can be fascinating to learn about the innovations and features that were unique to that time.
Where to Find That Elusive Serial Number
The serial number is your key to unlocking your Evinrude's age. But where exactly is it located? Here's what to look for:
- The Mounting Bracket: This is the most common location. Carefully inspect the mounting bracket that attaches the motor to the boat's transom. The serial number is often stamped or printed on a metal plate riveted to the bracket.
- The Cylinder Block: On some older models, particularly those from the 1950s and 60s, the serial number might be stamped directly into the cylinder block itself. This can be harder to spot, so use a flashlight and look closely.
- Inside the Cowling: Remove the engine cowling (the outer cover) and check the inside surfaces. Sometimes, a sticker or plate with the serial number is affixed to the inner wall of the cowling.
- Original Paperwork: If you're lucky, you might have the original owner's manual or registration documents. These often contain the serial number, confirming the motor's identity.
Important Tip: Before you start searching, clean the area around the potential serial number locations. Years of grime and corrosion can obscure the numbers and letters. A wire brush or solvent can help reveal the hidden code.
Decoding the Mystery: How Evinrude Serial Numbers Work
Now that you've found the serial number, the real detective work begins. Unfortunately, Evinrude didn't use a consistent system throughout its history. The decoding method varies depending on the year the motor was manufactured. Here’s a breakdown of the most common systems:
1922 - 1968: Simple Sequential Numbering
During this era, Evinrude primarily used a sequential numbering system. This means that the serial numbers were simply assigned in order as the motors were produced. There's no direct code within the serial number itself to indicate the year. To determine the year, you'll need to consult a serial number chart. These charts list the range of serial numbers produced in each year. You can find these charts online through various outboard motor enthusiast websites or by searching for "Evinrude serial number chart" along with the year range.
Important Note: Because these charts are based on production records, there can be some overlap between years. A motor with a serial number near the end of one year's range might have actually been manufactured in the following year.
1969 - 1979: Model Number and Suffix Code
This period introduced a more complex system. The serial number typically consists of a model number followed by a suffix code. The suffix code is the key to unlocking the year.
- Model Number: This identifies the specific model of the outboard motor. It provides information about the horsepower, engine type, and other features.
- Suffix Code: This is a letter or combination of letters that indicates the year of manufacture. For example, the letter "C" might indicate 1970, while "D" could indicate 1971.
Again, you'll need to consult a suffix code chart to decode the year. These charts are readily available online. Search for "Evinrude Johnson suffix code chart" (Johnson used the same system) to find a comprehensive list.
1980 - 2001: Introduction of the "INTRODUCES" Code
Evinrude and Johnson used a clever mnemonic device to encode the year in the serial number. The word "INTRODUCES" represents the digits 1 through 0. Each letter corresponds to a number:
- I = 1
- N = 2
- T = 3
- R = 4
- O = 5
- D = 6
- U = 7
- C = 8
- E = 9
- S = 0
The serial number in this period is usually a combination of numbers and letters. Look for two letters from the word "INTRODUCES" within the serial number. These two letters will represent the last two digits of the year.
Example: If the serial number contains the letters "RO," this translates to 45. Therefore, the motor was likely manufactured in 1985 (assuming it falls within the 1980-2001 range).
2002 - 2006: BRP's System
After Bombardier Recreational Products (BRP) acquired Evinrude and Johnson, they implemented a new serial number system. This system is more complex and requires access to BRP's internal database or a dealer. However, the model number often contains clues about the year of manufacture.
Key takeaway: For this period, it's best to consult with a BRP dealer or a qualified outboard mechanic to accurately determine the year.
Important Considerations:
- Johnson vs. Evinrude: Johnson and Evinrude were sister brands under Outboard Marine Corporation (OMC) for many years. They often used the same serial number systems and charts. Therefore, the same decoding methods generally apply to both brands.
- Canadian-Made Motors: Motors manufactured in Canada may have slightly different serial number formats or coding systems. Be sure to look for resources specific to Canadian-made Evinrude motors if you suspect yours was produced there.
- Transitional Years: Serial number systems sometimes changed mid-year. If you're unsure based on the charts, consider the features of the motor. Comparing your motor to pictures of models from different years can help narrow down the possibilities.
Resources for Decoding Your Evinrude Serial Number
Fortunately, you don't have to decipher these codes alone. Several resources are available to help you:
- Online Forums and Communities: Websites dedicated to outboard motor enthusiasts often have sections where you can post your serial number and get help from experienced members.
- Evinrude/Johnson Parts Websites: Many online parts retailers have serial number lookup tools that can identify the year of manufacture.
- Service Manuals: Original or aftermarket service manuals often include serial number charts and decoding information.
- BRP Dealers: Your local BRP dealer can access BRP's database to determine the year of manufacture, especially for newer models.
Common Mistakes to Avoid
- Transposing Numbers: Double-check the serial number to ensure you've transcribed it correctly. A single transposed digit can lead to an incorrect year.
- Assuming Consistency: Don't assume that the serial number system is consistent across all years. Always consult the appropriate chart or resource for the specific year range.
- Ignoring Suffix Codes: If your serial number includes a suffix code, don't ignore it! This code is crucial for determining the year.
- Relying on Memory: Don't rely on your memory when transcribing the serial number. Write it down or take a picture to avoid errors.
Frequently Asked Questions
- Where is the serial number located on my Evinrude? Look on the mounting bracket, cylinder block, or inside the cowling.
- Why is knowing the year of my Evinrude important? It helps you find the right parts, service manuals, and determine its value.
- How do I decode the serial number? Consult a serial number chart specific to the year range or use the "INTRODUCES" code for 1980-2001 models.
- What if I can't find the serial number? Thoroughly clean the potential locations and use a flashlight. If still missing, consult an outboard mechanic.
- Are Johnson and Evinrude serial numbers the same? Yes, they often used the same systems under OMC.
Conclusion
Decoding your Evinrude's serial number is a rewarding process that unlocks a wealth of information about your motor. By understanding the different serial number systems and utilizing available resources, you can accurately determine the year of manufacture and ensure you're using the right parts and maintenance procedures. Now, grab your flashlight and get ready to uncover your Evinrude's history!