Oil Seal for Mercury Marine 8/9.9/15 HP only (323 cc) 4Stroke 26-413651 18-0581

Oil Seal for Mercury Marine

This oil seal for Mercury Marine 8/9.9/15 HP 4-stroke outboards (323 cc) prevents oil leaks and keeps contaminants out, with OEM cross-reference numbers 26-413651 and 18-0581.

Overview

The oil seal is a critical component in Mercury Marine 8/9.9/15 HP outboards, ensuring the crankshaft stays lubricated without leaking. This oil seal is built to match the dimensions and tolerances required for the 323 cc 4-stroke engine. It is an ideal replacement for worn or damaged seals, restoring proper engine performance.

Built For Performance

• Precision-molded rubber compound for oil resistance
• Reinforced steel casing for structural integrity
• Designed to handle high temperatures
• Positive sealing lip for a tight fit
• Compatible with 323 cc Mercury Marine engines
• Easy to install with basic tools

Fits These Machines

• for Mercury Marine 8 HP 4-stroke
• for Mercury Marine 9.9 HP 4-stroke
• for Mercury Marine 15 HP 4-stroke

On-The-Job Use

• Replacing a leaking crankshaft seal during routine maintenance
• Restoring oil pressure in a 4-stroke outboard
• Preventing water contamination in the lower unit
• Supporting long-term reliability in saltwater or freshwater

Specs At A Glance

Good To Know

Q: How do I know if I need a new oil seal? A: Check for oil leaks around the crankshaft or a noticeable drop in oil pressure; a damaged seal will show signs of wear.

Q: Can I install this myself? A: Yes, with basic hand tools and a seal driver, but ensure the sealing surface is clean and free of burrs before installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.