Sierra Exhaust Manifold w/Hardware

Sierra 18-1956-3 MerCruiser 2.5L/3.0L Exhaust Manifold Replaces 860235A04

This sierra exhaust manifold features a one piece design and is for use with MerCruiser 2.5L/3.0L engines.

Used With:

Riser with Exhaust Tube 18-1975-1

Exhaust Manifold Mounting Gasket 18-1204-1

Interchangeable With:

Barr

MC 1 99798

GLM

51210

Marine Power

600333

MerCruiser Stern Drive

860235A04

99798A16

99798A3

99798A9

Osco

9798

Supersedes 18-1956-1 & 18-1956-2

Frequently Asked Questions

• What is the Sierra 18-1956-3 MerCruiser 2.5L/3.0L Exhaust Manifold used for? The Sierra 18-1956-3 is a one-piece exhaust manifold designed for use with MerCruiser 2.5L and 3.0L engines. It is a replacement for specified MerCruiser exhaust manifold part numbers and is designed for the listed marine engine applications.
• What MerCruiser engines does the Sierra 18-1956-3 exhaust manifold fit? The Sierra 18-1956-3 is specified for MerCruiser 2.5L and 3.0L engines. The supplied product description does not provide specific model years or serial-number ranges, so verify your engine application before purchasing or installing this manifold.
• What components are used with the Sierra 18-1956-3 exhaust manifold? The Sierra 18-1956-3 is used with the Sierra 18-1975-1 riser with exhaust tube and the 18-1204-1 exhaust manifold mounting gasket. Verify the applicable components for your specific MerCruiser exhaust system before installation.
• What MerCruiser part does the Sierra 18-1956-3 exhaust manifold replace? The Sierra 18-1956-3 replaces MerCruiser 860235A04 and is also interchangeable with 99798A16, 99798A3, and 99798A9. It is additionally listed as interchangeable with Barr MC 1 99798, GLM 51210, Marine Power 600333, and Osco 9798.
• Does the Sierra 18-1956-3 supersede other Sierra exhaust manifolds? Yes. The Sierra 18-1956-3 supersedes the Sierra 18-1956-1 and Sierra 18-1956-2 exhaust manifolds. Verify the application information and existing part number before selecting the replacement.
• What type of design does the Sierra 18-1956-3 MerCruiser exhaust manifold have? The Sierra 18-1956-3 features a one-piece exhaust manifold design. It is intended for the listed MerCruiser 2.5L and 3.0L engine applications and should be matched to the applicable exhaust system components.