Fits STX-12F, STX-15F & Ultra Series (1200cc/1500cc)
Get back on the water fast with this premium quality replacement **Starter Motor**. Designed specifically for **Kawasaki 4-Stroke Jet Skis**, this high-torque starter is built to handle the compression of the 1200cc and 1500cc marine engines found in the popular **STX and Ultra** series watercraft.
This unit is a direct replacement for the original Mitsubishi starter. It features a **double-sealed housing** to protect internal components from saltwater corrosion and moisture, ensuring reliable starting season after season.
MARINE READY: Engineered to meet or exceed OEM specifications for Kawasaki PWC applications, replacing part numbers 21163-3720 and 21163-3721.
Key Features
✔Direct Fit: No modifications required.
✔Marine Sealed: Protected against corrosion.
✔High Torque: Cranks 4-stroke engines easily.
✔Specs: 12 Volt, 9-Tooth Spline.
Technical Specs
Voltage:
12 Volts
Rotation:
CCW (Counter Clockwise)
Teeth Count:
9 Teeth
Starter Type:
PMDD
SKU Reference:
410-54138
Vehicle Fitment Guide
Model Name
Model Code
Year Range
STX-12F
JT1200
2003 - 2007
STX-15F / STX-160
JT1500
2004 - 2020+
Ultra 250X / 260X / LX
JT1500
2007 - 2010
Ultra 300X / 300LX
JT1500
2011 - 2013
Ultra 310X / 310LX / 310R
JT1500
2014 - 2020+
OEM Part Number Cross Reference
Kawasaki
21163-3720, 21163-3721
Mitsubishi
M0T60481
Arrowhead / WAI
SMU0322, 410-54138
Lester
18432
Frequently Asked Questions
Will this fit my 2005 STX-15F?
Yes, this starter is a direct fit for the 2005 Kawasaki STX-15F and all other years of this model.
Is this starter sealed for marine use?
Yes, this unit features double seals to prevent water ingress, which is critical for the longevity of PWC electrical components.
How many teeth does it have?
This starter motor has a **9-tooth** pinion gear, matching the Kawasaki 1200cc and 1500cc 4-stroke engine specifications.
Note: Please verify your Jet Ski model and year before purchasing. Fast shipping available across the UK and Europe.
