MerCruiser 816329A3 816978C One Piece Exhaust Manifold 4cyl 140hp 3.0L 1990-1994 Distributor Ignition Parts Cylinder Head to Crankcase Block

Cylinder Head to Crankcase Block

Thumb Screw: 22477A1

This would have been found on some various smaller Mercury / Mariner outboards from the 70's (I believe in 1980 they changed to a different thrust washer) 650 (65hp 4cyl)

The Part Number of the Bolt is 302592

Check with your parts manual or contact me if you have any questions of compatibility

MerCruiser 816329A3 816978C One Piece Exhaust Manifold 4cyl 140hp 3.0L 1990-1994 Distributor Ignition Parts Cylinder Head to Crankcase BlockPart Number(s) Included 816329A3 Intake Exhaust Manifold Assembly One Piece Construction (No End Caps on this) Stamped 816978C ***Make sure to use a 27 96429 Mounting Gasket with this manifold*** General Application Compatibility This seems to only have been found on MerCruiser 3. 0L Models 1990 1994 It appears the 3. 0LX models used a different Exhaust manifold. You should check the casting number on your manifold to make sure it matches Other