Yamaha – Case Cap | Plug & Cap | F1W-U591C-01-00
Yamaha – Case Cap | Plug & Cap | F1W-U591C-01-00
Yamaha – Case Cap | Plug & Cap | F1W-U591C-01-00 is backordered and will ship as soon as it is back in stock.
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Description
Description
Yamaha F1W-U591C-01-00 Case Cap is a genuine Yamaha plug or cap. It is designed for the factory opening, port, or connection point on compatible models. It is listed for 12 Yamaha model and model-year applications spanning model years 2008–2018.
Key Features
- Purpose: Replaces a damaged, worn, loose, or missing original cap or plug.
- Design: Size and installation location are specific to the listed models.
- Fitment: Specified for 12 Yamaha model and model-year applications, listed in the compatibility section below.
- Part Number: Sold as genuine Yamaha part number F1W-U591C-01-00.
Engine & Boat Compatibility
- FA1800 WaveRunner FX SHO (2013-2015)
- FA1800A WaveRunner FX Cruiser SHO (2013-2016)
- FB1800 WaveRunner FX HO (2012-2018)
- FB1800A WaveRunner FX Cruiser HO (2012-2018)
- FC1800 WaveRunner FX Cruiser SVHO (2016)
- FC1800 WaveRunner FX SVHO (2014-2018)
- FC1800A WaveRunner FX Cruiser SVHO (2014-2015, 2017-2018)
- FC1800B WaveRunner FX Limited SVHO (2017-2018)
- FX1800 WaveRunner FX Cruiser SHO (2008-2012)
- FX1800 WaveRunner FX SHO (2008-2012)
- FY1800 WaveRunner FX HO (2009-2011)
- FY1800A WaveRunner FX Cruiser HO (2009-2011)
Performance & Real-World Benefits
A missing or loose cap leaves an opening or port exposed. Replacing it restores the original closure at that point.
Why Choose Yamaha OEM
The Yamaha part number confirms the correct size and installation location for the listed models.
FAQ
Q1: Is F1W-U591C-01-00 a genuine Yamaha OEM part?
Yes. This listing is for genuine Yamaha part number F1W-U591C-01-00, intended for the applications listed in the compatibility section.
Q2: How do I confirm this case cap fits my Yamaha?
Match your exact model and model year to the Engine & Boat Compatibility list above, then verify part number F1W-U591C-01-00 against the applicable Yamaha parts diagram.
Q3: Should a seal or O-ring be replaced with this cap or plug?
Check the Yamaha parts diagram for any separate seal, gasket, or O-ring used with the component and replace worn sealing parts as required.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

