Mercruiser 4 cylinder exhaust manifold . Replaces part #s 99798A3, 99798A9, 99798A16, 99798A18 , & Sierra 18-1956-1.
Application includes 1983 through 1989 3.0L 140 R & MR Alpha 1 models using a MerCarb Carburetor w/electric choke
Carburetor bolt pattern dimension : 3-11/16" x 2"
Includes mounting gaskets and bolts
Mercruiser Manifold 18-1956-2 Replaces Mercruiser 99798A3, Mercruiser 99798A9, Mercruiser 99798A16, Mercruiser 99798A18, Mercruiser 806867A8, Marine Power 600333
Fits 2.5 & 3.0L (1983-89)