S.A. Gear S797 Engine Timing Crankshaft Sprocket 18-Tooth

The S.A. Gear S797 is a replacement engine timing crankshaft sprocket designed to restore precise valve timing and reliable engine operation. As a critical component of the engine's timing system, the crankshaft sprocket works in conjunction with the timing chain, camshaft sprocket, tensioners, and guides to synchronize crankshaft and camshaft rotation.

Key Features:

• 18-tooth design engineered for accurate timing chain engagement
• Precision-machined bore (1.250" inside diameter) for true, secure crankshaft fit
• 2.830" outside diameter with 0.410" tooth width for proper chain alignment
• 0.520" thickness with a single keyway notch for positive, non-slip installation
• Durable metal construction built to withstand the demands of continuous engine operation
• Compatible with OEM part number 10128346
• Available for individual purchase, making it ideal for targeted replacement during engine rebuilds or timing service

When servicing the timing system, it is recommended to also inspect and replace the timing chain, tensioners, and guides as a complete system to ensure long-term reliability and accurate engine timing.