SIERRA MerCruiser GM 250 Inline-6 Intake Manifold Gasket Set – 18-4389

Description

SIERRA MerCruiser GM 250 Inline-6 Intake Manifold Gasket Set – 18-4389

Sierra 18-4389 is a intake manifold gasket set for MerCruiser GM 250 CID inline-six / 165 HP engines, including cataloged applications from serial 270032 and later.

• Intake-manifold gasket set for the GM 250 CID inline-six MerCruiser 165 HP engine family.
• Replaces MerCruiser 27-47453A1; cross-references GLM 39660 and Mallory 9-61212.
• Confirm the engine serial and manifold/head arrangement before disassembly because earlier inline-six applications can use different sealing sets.
• Designed as a direct marine-service replacement where the listed Sierra/OEM reference is specified.
• Compare the original part number, dimensions and assembly configuration before installation.

Fitment for marine engine and drive service parts can vary by model, serial number, drive/gearcase, cooling configuration and prior OEM supersessions. Compare the original OEM number and physical configuration before installation, and follow the applicable manufacturer service procedure and torque specifications.

Specifications

• Manufacturer: Sierra
• Part Number: 18-4389
• Part Type: Intake manifold gasket set
• Application: MerCruiser GM 250 CID inline-six / 165 HP engines, including cataloged applications from serial 270032 and later.
• Engine: GM 250 CID inline-6
• Horsepower: 165 HP
• Serial Range: 270032 and later cataloged applications

Interchange / OEM References

• MerCruiser: 27-47453A1
• GLM: 39660
• Mallory: 9-61212