691483 – Key-Drive Pulley (Briggs & Stratton Replacement Key)

✅ Compatible With

• Designed for a wide range of Briggs & Stratton engines and lawn tractors.

• Direct replacement for OEM part numbers 691483 and 91540.

• Commonly used in drive systems where the crankshaft and pulley must rotate together.

🔧 Specifications & Design

• Part Number: 691483

• Type: Key-Drive Pulley Key (Crankshaft Key)

• Function: Locks the pulley to the crankshaft via the keyway, ensuring both components rotate in unison.

• Precision-machined to OEM tolerances for accurate fit and long service life.

🔍 Product Purpose

This key is essential for correct power transfer within the mower’s drivetrain. A damaged or missing key can cause pulley slippage, loss of drive, poor cutting performance, or complete disengagement of the deck or transmission.

⭐ Features & Benefits

• ✅ OEM-Spec Replacement – Perfect fit for engines requiring 691483 or 91540

• ✅ Prevents Pulley Slippage – Ensures proper alignment and drive engagement

• ✅ Durable Steel Construction – Designed to withstand torque, vibration, and repeated loading

• ✅ Cost-Effective Repair – Small part that prevents major mechanical issues

• ✅ Easy Installation – Drops into the crankshaft keyway with no modification required

⚠️ Installation Tips

• Remove pulley and inspect crankshaft keyway for wear

• Seat the new key fully in the slot before reinstalling the pulley

• Tighten pulley bolts/nut to manufacturer torque specs

• After installation, run engine briefly and check for smooth, vibration-free operation

📦 What’s Included

• 1 × Key-Drive Pulley Key (Part No. 691483)