Parts Player Starter Motor for Polaris Scrambler 500 4x4 — 12V High-Torque, 9-Spline CW Replacement

High-torque 12V starter motor engineered to replace worn starters on Polaris Scrambler 500 4x4 and a wide range of Polaris ATV/UTV models — 9-spline, clockwise rotation, brand-new unit.

If your Polaris won’t crank reliably, this Parts Player starter is a direct-fit aftermarket replacement built to restore dependable starting performance. Designed to match common OEM specifications (9-tooth, 9-spline shaft; clockwise rotation; 12 volts), it fits many Polaris Sportsman, Ranger, Scrambler, Trail Boss and Trail Blazer models across multiple years. The unit ships as a single new starter motor without mounting hardware and is manufactured in China to fit popular part numbers listed by Polaris and aftermarket catalogs.

Which Polaris models does this starter fit?

This starter covers a wide set of ATVs and UTVs where the original starter uses a 12V, CW rotation and a 9-spline shaft. Cross-reference your OEM part number against the replacement list to confirm fitment before ordering.

• Scrambler 500 4x4 (2007–2012), Ranger 4x4 400/500 (various years), Sportsman 400/500 series
• Trail Blazer 330, Trail Boss 330, Magnum 325/330/425/500 compatibility
• Common OEM cross numbers included: 18645, 3090188, 3084981 and many others

How do I confirm this starter is the correct replacement?

Verify your old starter’s electrical and mechanical features: voltage, rotation, tooth and spline counts. Matching these specifications ensures proper engagement with the flywheel and correct electrical operation.

• Voltage: 12V — must match vehicle battery system
• Rotation: clockwise (CW) — check marking or test orientation
• Tooth & spline count: 9 teeth and 9 splines — measure and confirm visually
• Compare OEM numbers: SMU0061, RS41196, ME3299-NA, 18645, 3090188, etc.

What should I expect during installation and maintenance?

Installation is similar to most ATV/UTV starters but may require basic hand tools and safe battery disconnection. This replacement arrives as the motor only; reuse your original mounting hardware or source OE bolts if needed. Routine checks of battery health and wiring will help prevent premature starter issues.

• Disconnect battery negative before removal to avoid shorts
• Inspect wiring, terminals, and solenoid connections for corrosion
• Test starter engagement before full reassembly
• Professional installation recommended if you lack mechanical experience

What are the product specifics and part cross references?

This starter is sold as a single unit, newly manufactured, with specifications tuned to replace common Polaris starter part numbers. It does not include bolts or mounting hardware and is produced in CN.

• Condition: New; Voltage: 12V; Rotation: CW
• Tooth count: 9; Spline count: 9; Pieces: 1
• Mounting hardware: not included — reuse OEM hardware or order separately
• Replacement part references: SMU0061, RS41196, ME3299-NA, 18645, 3090188, 3084981, 410-54020, and many aliases

Who this is for: Riders, fleet managers, and DIY mechanics who need a cost-effective replacement starter for older Polaris ATVs and UTVs. Ideal if your vehicle uses a 12V system with a clockwise starter and a 9-spline shaft, and you want a new aftermarket unit to restore reliable starting without buying a full OEM assembly. If you need a plug-and-play swap, confirm bolt pattern and wiring before purchase or consult a technician for fitment help.