Sierra 118-9391-1 Yamaha Outboard 4-Stroke Oil Change Kit 10W-30

The Sierra 18-9391-1 Oil Change Kit is a complete, all-in-one maintenance solution engineered specifically for Yamaha 4-stroke outboard engines. Designed to meet or exceed OEM specifications, this kit supplies everything needed to perform a thorough oil service in one convenient package — eliminating the guesswork of sourcing individual components.

Kit Includes:

• 5 Quarts Sierra 18-9420-2 10W-30 FC-W 4-Stroke Outboard Oil (Premium Blend, Catalyst Compatible)
• Oil Filter — Sierra 18-7911-1
• Oil Pan Drain Gasket — Sierra 18-0755
• Shop Towel

Key Features:

• Directly replaces Yamaha OEM kit LUB-MRNMD-KT-10 and LUB-MRNMD-KT-11
• FC-W certified 10W-30 oil formulated for four-stroke marine engines
• Catalyst-compatible premium blend formula
• Includes oil filter and crankcase drain gasket — no separate parts needed
• Each Sierra component meets or exceeds the original equipment part it replaces

Sierra has been a trusted name in marine aftermarket parts for over 58 years, supplying OEM engine manufacturers and boat builders worldwide. This oil change kit is the smart, cost-effective way to keep your Yamaha outboard running at peak performance.