SIERRA MerCruiser 2.5L / 3.0L One-Piece Exhaust Manifold – 18-1956-3

Description

SIERRA MerCruiser 2.5L / 3.0L One-Piece Exhaust Manifold – 18-1956-3

One-piece replacement exhaust manifold for MerCruiser 2.5L and 3.0L four-cylinder engines. It supersedes earlier Sierra manifold versions and is designed to pair with the corresponding 18-1975-1 exhaust elbow/riser assembly.

• One-piece cast exhaust manifold
• For MerCruiser 2.5L and 3.0L four-cylinder engines
• Use with Sierra 18-1975-1 exhaust elbow/riser
• Uses Sierra 18-1204-1 mounting gasket
• Supersedes Sierra 18-1956-1 and 18-1956-2

For marine engine and drive parts, fitment can vary by serial number, gear ratio, casting, or prior service history. Compare the original part number and physical configuration before installation; replace related gaskets, seals, races or hardware when their condition requires it.

Specifications

• Manufacturer: Sierra
• Part Number: 18-1956-3
• Application: Selected MerCruiser 2.5L and 3.0L four-cylinder engines, including many 1980s-era installations; verify OEM manifold number.

Interchange / OEM References

• MerCruiser 860235A04
• MerCruiser 99798A16
• MerCruiser 99798A3
• MerCruiser 99798A9
• Barr MC1-99798
• GLM 51210
• Marine Power 600333
• Osco 9798