These OSCO Manifolds are designed to fit most 4 cylinder 110 and 120 engines. They will accept the original Mercruiser two barrel carburetor and linkage. They can be used with original Mercruiser risers #55538, 39920, etc. Each manifold includes mounting bolts, carburetor mounting plate with gasket and bolts, and drain plug. For models where the two barrels of the carburetor mount side by side as shown.
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