Sierra 18-7420 O-Ring Replaces 25-21836

Sierra 18-7420 O-Ring 

This item has been discontinued by the manufacturer and is repalced by 18-7420-9

Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser Stern Drives and Mercury Marine engines.

• I.D.: 0.796"
• Width: 0.139"

Interchangeable with:

• GLM
• 82110
• Mallory
• 9-76565
• Mercruiser Stern Drive
• 25-21836
• Mercury Marine
• 25-21836
• Mercury Race Outboard
• 25-21836
• Mercury Race Sterndrive
• 25-21836
• Mercury Sport Jet
• 25-21836

California Residents: WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov