Mercury Outboard Serial Number Lookup

Where can I find my Mercury outboard serial number is a question we’re asked all of the time because it is an essential piece of information when ordering parts for your outboard.

For Mercury outboard engines 8hp and higher, your engine serial number (ESN) tag can be found halfway down the transom assembly on the right (starboard) side, just below the engine’s powerhead.

For engines 6hp and lower, you can find your Mercury outboard serial number on the top of the swivel bracket. You may need to tilt the engine up and trim it to the left to see the ESN tag clearly.

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

Mercury Outboard Resources

208 comments

I have mercury 25 Hp serial number #0D028383, can you please help me determine the year?
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PartsVu replied:
Hi John Christopher, Thank you for reading ;Your Mercury 25 HP motor with serial number #0D028383 was manufactured in 1990. If you have any additional questions or concerns, feel free to reach out! Markine D.

Good day.
Could you help me clarify a doubt, I work as an insurance expert, I inspected a boat with a Mercury 400 CXL (Racing) engine or model 14000106A with serial number 3B538984, in the CE part now it does not say year, with that data how do I know the true year or where is there a search engine to find out the year, I know it is 2024 from the invoice, but if I didn’t have it how would I check the year?
Thank you for your attention and I look forward to your response.
Best regards
Jose
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PartsVu replied:
Hi Jose, Thank you for your inquiry! Based on the information provided, the Mercury 400 CXL (Racing) engine with serial number 3B538984 is indeed a 2024 model. If you have any further questions or concerns, please don’t hesitate to reach out. Best regards! Markine D

Hello I have the same question as the others: could you tell me what year my motor is by serialnumber? It is:OP232002
Thank you very much!
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PartsVu replied:
Hi Quint, Thanks for your question! Unfortunately, I couldn’t find any results for the serial number OP232002 in the Mercury directory. Could you please confirm that the serial number was located on the mounting bracket of the engine or on the top cowling? It’s usually found on a small plate there. If you have a chance, you might also send a picture of that plate to partsvu@partsvu.com. We can take a look and help determine the correct serial number. Markine D.

Hello Parts Vu,

I just purchased a boat which has a 60 HP Mercury 4 Stroke motor. The serial number is OT347550. Can you help me glean any information I can to help me be able to service this motor? Thank you for the help.

Steve Kuziej
October 30, 2024
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PartsVu replied:
Hi Steve, Thank you for reaching out and for your interest in Parts Vu! Based on the serial number you provided, your 60 HP Mercury 4 Stroke motor is indeed a 2001 model. If you have any further questions or need assistance with servicing or parts, please don’t hesitate to reach out. We’re here to help! Best regards, Markine D. Assistant Manager

I have a Mercury 8 HP with serial number 0A756572. Would you have any idea how I can find out the year
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PartsVu replied:
Hi Daniel, Thanks for your question! Based on the serial number 0A756572, your Mercury 8 HP outboard is indeed from 1989. If you have any additional questions or concerns about your motor, feel free to reach out. I’m here to help! Best, Markine D. Assistant Manager