Mercury Outboard Serial Number Lookup
Mercury Outboard Serial Number Lookup

How to Find Your Mercury Boat Engine Serial Number

Where is the serial number on a Mercury outboard?

For most Mercury outboard engines 8hp and higher, the serial number is located halfway down the transom bracket on the right (starboard) side, just below the powerhead. On 6hp and smaller engines, it's found on top of the swivel bracket.

Many boaters take a quick photo of their serial number with their phone—this simple habit can save hours of troubleshooting when ordering parts.

We highly recommend you take a picture of your ESN tag and keep the photo on your mobile phone in case the tag becomes unreadable or if you need this information when you’re not near your boat.

**Are you looking for Mercury Outboard parts and products for your specific engine? Check out PartsVu's Mercury Maintenance Parts Library. Common maintenance parts and products are presented by engine model allowing you to easily find the parts you need.**

What About a Mercruiser Serial Number?

On a Mercruiser sterndrive or inboard engine, typically, the tag is on the block near the starter. But, sometimes, it's down by the starter on the engine block, near the flywheel, or on the flame arrestor.

All too often, the ESN tag on a Mercruiser is not the easiest to find, so definitely take a picture and save it on your cell phone.

**Are you looking for Mercruiser parts and products for your specific engine? Check out PartsVu's Mercruiser category page. We've worked to make it as easy as possible to find the parts and products you need.**


Why Do You Need to Know Your Mercury Serial Number?


mercury outboard serial number lookup - righthand side of engine shaft
The placement of the Mercury serial number label varies a bit from engine to engine. However, it is typically located on the righthand side of the engine.

Simply put, your Mercury serial number will allow you to identify and order the right parts for your engine model and year.

Mercury manufactures many, many different models and often variations of each model. While one thermostat might be the proper selection for some variations of a given engine model, there’s no guarantee that it will be compatible will all variations of that engine—knowing your Mercury serial number is the key.

As if matters weren’t confusing enough, sometimes Mercury will change an engine model design midway thru a given engine model year.

Therefore, Mercury Marine parts are often segmented by serial number ranges. Knowing your serial number will allow you to make sure that you are ordering the right parts, whether you are utilizing a Mercury engine schematic/Mercury outboard parts diagrams, the Mercury parts library, the complete list of Mercruiser parts library, or other resources.

Mercury Maintenance Parts Selection Tool

How do I find out what year my Mercury outboard is by serial number?

To determine the year of your Mercury outboard, use the serial number on the engine and reference a Mercury Marine serial number-to-year chart. You can also enter the serial number into the Mercury Marine or PartsVu lookup tool to identify the exact year and model.

What is the serial number location on a Mercury 9.9 outboard?

The serial number for a 9.9hp Mercury engines is usually located on the top of the swivel bracket, which may require tilting the motor to see clearly.

Where is the serial number on a Mercruiser engine?

It’s typically found near the starter or flywheel, or on the flame arrestor. Always take a photo of it for safekeeping.

How can I identify my Mercury outboard by serial number?

Use the serial number lookup on the PartsVu Mercury Maintenance Library or the Mercury Marine parts catalog to determine the engine model and year.

What year is my Mercury outboard motor?

Once you locate the serial number, compare it against Mercury’s official serial number/year chart, or enter it online in a lookup tool.

Need parts for your Mercury engine? Shop all Mercury outboards at PartsVu.

344 comments

Hello I have a 50hp 2 stroke Mercury outboard. The serial number is OG370080
I am trying to get the year and model to find the right parts. I also have a question about losing power after a few hours of running the engine on the water. It will run fine but after a bit it will big down if you will when running wide open.

Thank you
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PartsVu replied:
Hi Tony, Thanks for reaching out. Based on the serial number 0G370080, your Mercury 50 HP 2-stroke outboard is a 1995 model. As for the issue you’re experiencing—where the engine runs fine at first but then starts to bog down at wide-open throttle after a while—this is often related to a fuel delivery problem or possible overheating. Here are a few things to check:

1. Fuel Vent & Fuel Lines: Make sure the fuel tank vent is open and not clogged. Also, inspect the fuel lines, primer bulb, and fittings for blockages, leaks, or air leaks. 2. Fuel Pump: A weak fuel pump can cause the engine to starve for fuel after running for a while. 3. Carburetor & Filters: Dirty carburetors or clogged fuel filters can also cause this issue. Cleaning or rebuilding the carbs and replacing filters might help. 4. Overheating: If the motor is overheating, it may go into a protective mode and lose power. Make sure the water pump is working properly and the cooling system is clear. If you continue to have issues, I recommend having a Mercury-certified technician take a closer look. Feel free to reach out if you’d like help finding the correct parts or troubleshooting further!

Best Regards Markine

Tony Malo,

Year of my 15 ho Mercury serial number 1R205747
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PartsVu replied:
Hi Brent, Thanks for reaching out. Based on the serial number 1R205747, your Mercury 15 HP outboard is a 2022 model. If you have any additional questions or need further assistance, please feel free to reach out! Markine

Brent,

Want to know year of 9.9 mercury outboard, serial number 0R499679
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PartsVu replied:
Hi Michael, Thanks for reaching out. Based on the serial number 0R499679, your Mercury 9.9 outboard is a 2012 model. If you have any other questions or need assistance with parts or maintenance info, feel free to reach out! Best Regards Markine

Michael Campbell,

I’m trying to figure out the year and spec if my Mercury 40
Serial number: 6578146
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PartsVu replied:
Hi Arthur, Thank you for reaching out. Based on the serial number 6578146, your Mercury 40 HP outboard is from 1984. If you have any other questions or need help with parts or specs, please feel free to reach out!

Best Regards Markine

Arthur Santos,

I’m trying to figure out the year of my 9.9 merc, serial number: oD156589
Trying to find a fuel pump diaphragm
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PartsVu replied:
Hi Hunter, thanks for reaching out!

Based on the serial number 0D156589, your 9.9 HP Mercury outboard is a 1992 model. Regarding the fuel pump diaphragm, the original part number for the fuel pump you’re looking for is unfortunately no longer available through Mercury.

Best Regards Markine

Hunter,

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