Fel-Pro 17740 is a rear main seal gasket for GM Chevy big block V8 marine engines using a 2-piece rear main seal and right-hand reverse rotation. It helps control oil leakage at the rear of the crankshaft, with repair-focused construction intended for real-world sealing surfaces.

Fel-Pro 17740 Compatibility Notes:

• Fits 1968-1992 GM Chevy big block V8 marine engines with reverse RH rotation and a 2-piece rear main seal.
• Application coverage includes 7.4 L 454 ci and 8.2 L 502 ci marine engines built for right-hand rotation use.
• Rubber seal material is engineered for crankshaft sealing in marine repair applications.
• Application-specific design is validated for fit, form, and function and meets or exceeds OE specifications.
• For marine reverse-rotation applications only; verify crankshaft rotation and rear main seal style before installation.

Includes:

• One 2-piece rear main seal

Use this seal when servicing oil leakage at the rear of the crankshaft on compatible marine engines. It is not intended for standard automotive rotation applications.

Replaces Mercruiser part numbers 26-75980 and 26-75980T for the specified GM Chevy marine reverse-rotation big block applications.