Sierra 18-2534 Spaghetti Seal 40" Lower Unit Gearcase Seal

The Sierra 18-2534 is a 40-inch spaghetti seal designed for outboard motor lower unit gearcase applications. This critical sealing component helps prevent gear oil leakage and keeps water from intruding into the gearcase, protecting the internal components of Johnson, Evinrude, and OMC outboard motors.

Key Features:

• 40-inch length universal spaghetti seal
• Manufactured with OEM-equivalent materials for reliable sealing performance
• Replaces OEM part numbers: OMC 309044, Chrysler/Force F184122-1, and Mallory 9-78007
• Designed for split-case lower unit assemblies
• Fits in gearcase housing grooves to create a water-tight seal between upper and lower unit halves

This replacement seal meets or exceeds original equipment specifications and is a critical component during lower unit rebuilds and gearcase maintenance. Proper installation with marine-grade sealant ensures optimal protection against oil loss and water contamination in the gearcase.