SIERRA Mercury / MerCruiser Brass Castle Washer – 18-3714

Description

SIERRA Mercury / MerCruiser Brass Castle Washer – 18-3714

Sierra 18-3714 is a Propeller castle washer engineered for the specified marine application. Mercury/Mariner 135-275 HP V6 two-cycle outboards and MerCruiser Alpha / Bravo I applications using conventional rubber-hub propellers rather than Flo-Torq II.

• Brass castle/locking washer for traditional rubber-hub Mercury/MerCruiser propeller installations.
• Cataloged for Mercury/Mariner 135-275 HP V6 two-cycle outboards plus Alpha and Bravo I drives when not using Flo-Torq II.
• Cross-references Mercury/MerCruiser 12-31211-family washer references.
• Works with the prop-nut locking arrangement to retain the propeller on the shaft.
• Do not use this washer solely by horsepower; confirm the propeller hub system and prop-shaft hardware configuration.

Fitment for marine engine and drive service parts can vary by model, serial number, gearcase, cooling configuration and prior component supersessions. Compare the original OEM number and physical configuration before installation, and renew related seals, locking hardware or adjacent wear items when their condition requires it.

Specifications

• Manufacturer: Sierra
• Part Number: 18-3714
• Part Type: Propeller castle washer
• Application: Mercury/Mariner 135-275 HP V6 two-cycle outboards and MerCruiser Alpha / Bravo I applications using conventional rubber-hub propellers rather than Flo-Torq II.
• Material: Brass
• Hub Compatibility: Conventional rubber hub; non-Flo-Torq II

Interchange / OEM References

• Mercury Marine: 12-31211, 12-31211A2, 12-31211A3, 12-31211Q03