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Powerful Engines Designed to Fit Every Rider

A wide range of powerful, proven engine options for confident control wherever you ride. Visit the model page to learn which engine options are available for this model.
550 engine

The Polaris Liberty 550 snowmobile engine provides reliable performance at a great value.

600 engine

This liquid-cooled 600 Cleanfire engine with semi-direct injection (SDI) delivers strong acceleration, starts easily and reliably, and delivers impressive fuel economy in real-world riding situations.


Developed in conjunction with the AXYS platform, the proven 800 Cleanfire H.O. Engine delivers proven performance and durability, along with class-leading acceleration. The integrated mounting position optimizes the balance of the chassis.

850 engine

The Polaris 850 Patriot is the most powerful snowmobile engine ever built by Polaris,  built with pride in the USA. The 850 Patriotbuilds on the legendary 25-year heritage of Polaris Liberty engines and creates an all-new benchmark for durability, acceleration, and response.

650 engine

Built from the proven Polaris 850 Patriot architecture, the 650 Patriot is designed for class-leading durability, unrivaled efficiency and exceptional performance. It offers a new level of fuel economy and instant throttle response. It’s pure, smooth acceleration and power from first pull to open throttle.

Patriot Boost engine

The industry-leading Patriot Boost engine delivers turbocharged performance with proven durability, seamless control, and more power everywhere.

Patriot 9R engine

The newest member of the factory mod family, the 900cc engine delivers race mode repsonse and performance from a factory big bore engine. 

ProStar S4 engine

Based on the proven Polaris ProStar architecture, the new 4-stroke ProStar S4 delivers reliability, easy ownership, and spirited Polaris performance.

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Polaris Inc.   2100 Hwy 55, Medina MN 55340