Exhaust Manifold Gasket – Fits MerCruiser 140 HP 3.0L (Replaces 27-53354, 18-2912, 31570, 9-61417) QuickMarine Service intervals should be shorter

Service intervals should be shorter if you operate frequently in saltwater or sandy/silty conditions

It provides essential corrosion protection and aids in hydrodynamic trimming

1x Thermostat (Replaces 346-01030)

and the motor's weight should be resting on it without any looseness or gaps

Access the transom assembly

Exhaust Manifold Gasket – Fits MerCruiser 140 HP 3.0L (Replaces 27-53354, 18-2912, 31570, 9-61417) QuickMarine Service intervals should be shorterProduct Details This is a direct replacement Exhaust Manifold Gasket for MerCruiser 140 HP 3. 0L (181 CID) 4 cylinder engines (GM based stern drive applications) from years 19681982. It ensures a proper seal for the wet joint between the exhaust manifold and the cylinder head, preventing water and exhaust leaks. It serves as a direct cross reference for Mercury MerCruiser 27 53354, Sierra 18 2912, GLM 31570, and Mallory 9 61417. Installation Type: Wet