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Mercury Outboard Serial Number Lookup
Mercury Outboard Serial Number Lookup

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


Sorry the Year not yar


Hello Paul,

Thank you for contacting us.

Based on the serial number you provided, this is the information I was able to gather:

ENG: 0R630337 1F21201EL MERCURY 20 MH
Manufacture Date: 09/01/2014
Comments: ME 20 MH 4S


Mario Alvarez,

Hi Guys,
I am trying to confirm the yar of this Mercury 20HP short shaft outboard engine
Model Number is 1F21201EL Serial number is 0R630337


Hello..we are looking for the year of manufacture for a Mercury 110 motor as we would like to order a manual. (We are not sure if the cover is correct so it may not be the right one for this motor) We are in Canada and found the serial number in two places. The number is, 7057202. Any help would be appreciated. Thank you.

Mary Ann Yewen,

Hello Mary Ann,

Thank you for contacting us.

Unfortunately, we could not find any information on the serial number you provided. This could be because your outboard is an older model. I would suggest you contact Mercury directly for additional help. Mercury can be contacted at 920.929.5040


Mario Alvarez,

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