MerCruiser 816329A3 816978C One Piece Exhaust Manifold 4cyl 140hp 3.0L 1990-1994 Distributor Ignition Parts 0L Outboards 1998ish-2006

0L Outboards 1998ish-2006

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)

Thumb Screw: 22477A1

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

The internal surfaces all look good & ready to accept your internals

MerCruiser 816329A3 816978C One Piece Exhaust Manifold 4cyl 140hp 3.0L 1990-1994 Distributor Ignition Parts 0L Outboards 1998ish-2006Part 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