Sierra 118-0334 Mounting Plate to Driveshaft Housing Gasket

The Sierra 18-0334 is a precision-engineered mounting plate to driveshaft housing gasket designed for Mercury/Mariner outboard engines. This critical sealing component creates a watertight barrier between the mounting plate and driveshaft housing assembly, preventing water intrusion and gear oil leakage that can compromise engine performance and reliability.

Key Features:

• Direct replacement for Mercury Marine OEM part number 27-39402
• Manufactured to meet or exceed original equipment specifications
• Precision-cut construction ensures proper fit and reliable sealing
• Marine-grade materials resist saltwater corrosion and degradation
• Essential for proper driveshaft housing maintenance and rebuild procedures

Sierra Marine is a trusted leader in aftermarket marine engine parts, offering comprehensive coverage for all major marine engine brands. Each Sierra gasket undergoes rigorous quality control to ensure optimal performance and durability in demanding marine environments. This gasket is a critical component during lower unit service, driveshaft housing repairs, or complete outboard rebuilds.