WSM Starter 21163-3721, 21163-3720 for Kawasaki Ultra LX, Ultra 310, STX-15F, STX 160, SX-R 2003-2026
$115.61 USD
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WSM Starter 21163-3721, 21163-3720 for Kawasaki Ultra LX, Ultra 310, STX-15F, STX 160, SX-R 2003-2026
$115.61 USD
This is an aftermarket replacement starter for Kawasaki jet skis, made by WSM and matching OEM numbers 21163-3721 and 21163-3720. It fits a wide range of Kawasaki PWC, including the Ultra LX, Ultra 310LX, STX-15F, STX 160 and SX-R. Replace it when your ski cranks slowly, clicks without turning over, or won't crank at all and you've already ruled out the battery and cables.
| Part number | PH100-KW04 |
| Replaces OEM # | 21163-3721, 21163-3720 |
| Brand | WSM |
| Condition | New |
Fits
- Kawasaki STX-12F (2003-2007)
- Kawasaki STX-15F (2004-2008; 2011-2019)
- Kawasaki STX 15-F (2009-2010)
- Kawasaki STX 160 (2020-2023; 2025-2026)
- Kawasaki STX 160LX (2020-2026)
- Kawasaki STX 160X (2020-2023; 2026)
- Kawasaki SX-R (2017-2024)
- Kawasaki Ultra 250X (2007-2008)
- Kawasaki Ultra 260LX / 260X (2009-2010)
- Kawasaki Ultra 300LX / 300X (2011-2013)
- Kawasaki Ultra 310LX (2014-2026)
- Kawasaki Ultra 310LX-S (2022-2026)
- Kawasaki Ultra 310R (2014-2021)
- Kawasaki Ultra 310X (2014-2025)
- Kawasaki Ultra 310X SE (2014-2019)
- Kawasaki Ultra 160LX / 160LX-S (2023-2026)
- Kawasaki Ultra LX (2007-2022)
Replaces OEM part numbers
21163-3721 · 21163-3720
Not sure it fits your ski? Call or text 954-914-6465 with your hull ID (HIN) and we'll confirm before you order.