4 Cylinder Exhaust Manifold to Head Gasket | Sierra 18-2912-1
4 Cylinder Exhaust Manifold to Head Gasket | Sierra 18-2912-1
Sierra
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4 Cylinder Exhaust Manifold to Head Gasket | Sierra 18-2912-1
Combination intake & exhaust manifold gasket fits various early model GM 3.0L 4 cylinder marine engines.
- Exhaust manifold gasket
- For Mercruiser and OMC GM 3.0L 181 cu. in. marine engines
- Fits Mercruiser 140 model engines
- Will not work with all 3.0L engines - refer to engine model and serial for correct gasket
- Intake ports have two square ports and two ports with the corners blocked
- Exhaust ports are all square
- Replaces Mercury 27-53354
- Replaces OMC 908079
- Replaces Mallory 9-61417
- Replaces Sierra 18-1203, 18-2912
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.