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Add to CartThis sierra exhaust manifold features a one piece design and is for use with MerCruiser 2.5L/3.0L engines.
Used With:
Interchangeable With:
Supersedes 18-1956-1 & 18-1956-2
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.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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