Polaris Sportsman XP 550 & XP 550 EPS UTV 2009 Service Manual (P/N 9921973)

The 2009 Polaris Sportsman XP 550 and XP 550 EPS demand precise factory-authorized procedures for accurate diagnostics and maintenance. Official Polaris publication P/N 9921973 documents the specific EFI diagnostic routines for the ES550PLE engine system, giving technicians the exact reference material required for complex troubleshooting.

• Covers 2009 Polaris Sportsman XP 550 and XP 550 EPS models (variants A09ZN55AL, AQ, AS, AT, AX, FX and A09ZX55AC, AL, AQ, AS, AX)
• Official Polaris publication P/N 9921973
• Includes 12 wiring schematics and 15 torque-specification tables for engine, drivetrain, and chassis components
• 373-page digital PDF manual
• Details complete ATV repair coverage for the Polaris Variable Transmission (PVT), Active Descent Control (ADC), Electronic Power Steering (EPS), and Centralized Hilliard front gearcase
• Outlines step-by-step tasks like CV joint boot replacement, AWD armature plate inspection, and hydraulic brake bleeding

Engine, Drivetrain, and Electrical Systems

This workshop manual outlines the strict technical requirements for the Fuji 549cc single-cylinder engine. It moves logically from scheduled maintenance charts to full engine disassembly, detailing crucial steps like valve clearance adjustments and cylinder head torque sequences. You get direct access to the numbers that matter in the bay. To help avoid expensive trips to the dealership, the document provides detailed instructions for complex procedures such as PVT clutch spider removal, ADC system fluid bleeding, Throttle Position Sensor (TPS) calibration, and water pump mechanical seal replacement. Electrical sections break down the EFI control unit, T-MAP sensor testing procedures, and ignition coil resistance thresholds. Having these exact factory pinout values and electrical break-out diagrams directly reduces bench time and prevents costly comebacks during intricate electrical work on the XP platform. To further support daily operations, the content features transmission exploded views, oil flow diagrams, and gearcase exploded views.

When servicing these specific ATV models, mechanics face a few critical assembly traps. For example, the EPS 8-way wire harness connector lacks a channeled lock on both sides, allowing it to be inadvertently installed 180 degrees backward, which will completely disable the power steering unit. Additionally, the transmission drive coupler utilizes a special splined washer designed for one-time use; reusing this washer will cause the hub to loosen under heavy loads.

Specification Highlights and Reference Data

Accurate bench work relies on exact OEM figures. The documentation covers cooling system capacities, internal engine fastener torque values, and suspension alignment guidelines for the dual A-arm configuration. Cylinder compression is rated at 70–90 psi, while fuel system pressure requires a steady 43 psi. The spark plug gap must be set at 0.035 in. (0.90 mm). You will also find reference values for the ECU operating voltage, which requires a minimum of 7.0 volts. Working on high-pressure fuel and electrical systems carries inherent risks. The specifications provided here give an overview of the manual's depth; always rely on the complete OEM procedures and proper workshop safety protocols before beginning any diagnostic or tear-down work.