I recently purchased a used boat with a Yamaha 9.9 4-stroke outboard motor.

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I’ve tried looking for the model number so that I can buy replacement parts (someone told me I should have a replacement shear pin on hand).

But I haven’t found the model number yet. Where can I find it on the motor?

The previous owner can’t recall what the model number is or where on the motor it’s written.

2 Answers 2


The silver tag on the transom mount, visible in the photo, is likely a stamped metal tag with your serial number. The tag should either mention the model, or the model will be encoded into the serial.

If that tag isn't it then there should be one, very similar in size, location, and appearance.


According to the manual, the ID plate with model number, model name and serial number is located here:


The model number is in the upper left corner of this plate, the corner that looks like it's covered in gray paint on your motor.


The manual is available online via your favorite search engine.

  • 2
    You sure you've got the right thing circled? Looking at the image, there's nothing there. You sure you weren't aiming for the tag to the 4 o'clock of the circle? Jun 23, 2023 at 13:42
  • @Pᴀᴜʟsᴛᴇʀ2 Yep, if you magnify it till it's pixelated, you'll see a light colored rectangle with the left half of it covered in gray paint. This is the location illustrated in the manual's diagram. The gray paint covers the data that the OP was looking for, which is why the OP didn't see it.
    – MTA
    Jun 23, 2023 at 14:35
  • @Pᴀᴜʟsᴛᴇʀ2 Added enlarged image.
    – MTA
    Jun 23, 2023 at 14:45
  • Okay, I'll admit there is something there, but I still don't think it's what you are saying it is. Blow up the second image. It shows that area plainly. Jun 23, 2023 at 17:41
  • 1
    I would lay money the serial number is on the other tag down the side (the obvious tag, lol). Jun 23, 2023 at 18:26

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