The Gravely / Ariens extension spring (part number 08300505) is a genuine OEM component used in PTO deck idler systems across a range of zero turn and walk-behind mower models. This spring helps maintain proper belt tension, ensuring consistent blade engagement and smooth deck performance.

Made from high-strength steel, the spring measures approximately 12″ in total length with a 0.50″ inner diameter. It is commonly used in Gravely Pro-Walk, Rapid XZ, Pro-QXT, and other commercial-grade mower platforms. The spring connects to the idler arm and deck frame, absorbing vibration and reducing wear on belts and pulleys.

Replacing worn or stretched springs is essential for maintaining cutting performance and preventing premature belt failure. This part is suitable for both residential and commercial applications where durability and reliability are critical.

Fits:

• Gravely Pro-Walk 61HE
• Gravely Rapid XZ 52 / 60
• Gravely Pro-QXT 36 / 48 Finish Mower Attachments
• Gravely XDZ PM 320
• Ariens equivalent models with compatible deck assemblies

Technical Specifications:
OEM Part Number: 08300505
Length: Approx. 12 inches
Inner Diameter: 0.50 inch
Material: Steel
Function: PTO Deck Idler Spring