591139 / 593959 Recoil Pull Starter

Key Features

• High-Impact Structural Housing: Manufactured from a durable, UV-resistant composite designed to withstand the high-torque stress of repeated starting cycles in demanding outdoor environments.
• Precision-Wound Spring Mechanism: Features a high-tensile steel recoil spring that provides smooth, consistent retraction and ensures the handle returns securely to the housing after every pull.
• Abrasion-Resistant Starter Rope: Equipped with a heavy-duty, multi-strand nylon pull cord designed to resist fraying and snapping, even after years of exposure to heat and vibration.
• Ergonomic Pull Handle: Includes a large, easy-grip handle designed for maximum leverage and comfort, allowing for reliable starts even while wearing heavy work gloves.
• Direct OEM Specification: A precision-engineered replacement that aligns perfectly with factory mounting points and flywheel pawls, restoring the "first-pull" starting capability of your engine.

Replaces / Cross-Reference Part Numbers

• 591139
• 593959
• 595355
• 590588
• 593961

Compatibility & Fitment

This recoil assembly is the primary starter for Briggs & Stratton's E-Series small vertical engines. Key compatible models include:

• Briggs & Stratton Engines: 08P502, 093J02, 09P602, 09P702.
• Engine Series: 450E, 500E, 550E, 550EX (125cc and 140cc displacements).
• Popular Mower Brands: Fits a wide variety of walk-behind mowers from Troy-Bilt, Craftsman, Murray, Husqvarna, and Yard Machines utilizing these specific B&S engines.
• Note: Verify the mounting hole pattern on your original shroud, as some similar-looking engines may use a different bolt configuration.

When to Replace

• Frayed or Snapped Rope: The pull cord has broken or is showing significant wear, making it impossible to rotate the engine.
• Failed Retraction: The rope stays extended after a pull and does not reel back in, indicating a broken or fatigued internal recoil spring.
• Slipped Engagement: You pull the handle but feel no resistance, or hear a "grinding" noise, meaning the internal plastic pawls or the flywheel cup are worn out.
• Cracked Housing: The plastic shroud has developed stress fractures or has broken mounting tabs due to impact or excessive vibration.
• Seized Mechanism: Dirt, rust, or debris has entered the assembly, causing the pulley to stick and preventing a smooth starting motion.

Installation Tips

• Match the Pawls: Before bolting the new starter down, pull the handle slightly to ensure the internal pawls extend and catch correctly on your engine's flywheel.
• Hand-Tighten Bolts: Start the mounting bolts by hand to avoid cross-threading the plastic engine shroud. Tighten firmly but do not over-torque, as this can crack the new housing.
• Check the Flywheel Cup: Inspect the metal cup on top of your engine's flywheel. If the edges are rounded or rusted, it may prevent the new starter pawls from engaging properly.
• Clear Debris: Use a brush or compressed air to remove grass clippings and dirt from the top of the engine before installation to prevent them from entering the new recoil mechanism.
• Route the Rope: If your mower has a handle-mounted pull start, ensure you route the rope through the guide on the mower handle carefully to prevent it from rubbing against the sharp edges of the engine cover.