SIERRA MerCruiser MC-I / R Water Pump Base, 1970-1984 – 18-3417

Description

SIERRA MerCruiser MC-I / R Water Pump Base, 1970-1984 – 18-3417

Sierra 18-3417 is a Water pump base assembly engineered for the specified marine application. MerCruiser MC-I / #1 and R drives without the flush screw in the water-pump housing, approximately 1970-1984, using OEM base 46-57234A1.

• Replacement water-pump base for early MerCruiser MC-I/#1 and R stern drives.
• Application is the housing style without the flush screw, cataloged for 1970-1984 drives.
• Replaces MerCruiser/Mercury 46-57234A1.
• Supports the lower-unit pump cup/impeller assembly and provides the specified sealing interfaces.
• Compare the original base, flush-screw provision and drive serial/model before ordering.

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: 18-3417
• Part Type: Water pump base assembly
• Application: MerCruiser MC-I / #1 and R drives without the flush screw in the water-pump housing, approximately 1970-1984, using OEM base 46-57234A1.
• Drive Families: MC-I / #1 / R
• Model Years: 1970-1984
• OEM Reference: 46-57234A1

Interchange / OEM References

• Mercruiser Stern Drive: 46-57234A1