SIERRA Marine O-Ring, 3.5 x 0.21 in – 18-7157

Description

SIERRA Marine O-Ring, 3.5 x 0.21 in – 18-7157 is a replacement sealing O-ring for select Mercury/MerCruiser applications. Its published dimensions are 3.500 in inside diameter by 0.210 in cross-section, making size verification straightforward before installation.

Use the OEM interchange and measured seal dimensions together to confirm fitment. Clean the groove and mating surfaces before assembly, and lubricate only with a fluid compatible with the system and seal material.

Key Features

• 3.500 in inside diameter
• 0.210 in cross-section width
• single configuration
• For select Mercury/MerCruiser applications
• OEM interchange provided below for fitment verification

Specifications

• Sierra part number: 18-7157
• Product type: Marine O-ring
• Inside diameter: 3.500 in (88.9 mm)
• Cross-section width: 0.210 in (5.3 mm)
• Package quantity: 1

Interchange

• GLM: 83410
• Mallory: 9-76542
• MerCruiser: 25-29976
• Mercury Marine: 25-29976