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Mercruiser 4-Cylinder 181 C.I.D. 140 H.P.

Model 140 engine: Log style direct replacement

Mercruiser 4-Cylinder 181 C.I.D. 140+ H.P.
Part Number Description
MC-1-52390 Direct replacement water cooled exhaust manifold. Replaces MerCruiser part number B-52390A1. For serial number 3332138 and up.
MC-20-60426 Direct replacement exhaust elbow riser (utilizes a stainless steel sleeve at the water/air mixing area). Replaces MerCruiser part number B-60426A1.
MC-20-76351 Direct replacement exhaust elbow riser. Replaces MerCruiser part number B-76351A1. Not pictured.
1-54870 Direct replacement exhaust manifold rear end cap. Serial number 4481625 and below.
1-54870P Rear end cap mounting package.
1-60252 Direct replacement exhaust manifold end cap / connector. Replaces MerCruiser part number B-60252.
1-60252P Front end plate mounting package.
1-73813 Direct replacement exhaust manifold rear end cap. Serial number 4481625 and up.
MC-1-52390P Exhaust manifold mounting package.
MC-20-55730 Stainless steel fresh water cooling block off plate for use with MerCruiser riser numbers 60426, 76351 and 76771. Requires two (2) gaskets—part number MC47-27-52076.
MC-20-60207 Stainless steel block off plate (with vent hole) for use with MerCruiser riser numbers 60426, 76351 and 76771. Requires two (2) gaskets—part number MC47-27-52076. Used in pre-heating plumbing systems.
MC-20-60426P Exhaust riser elbow mounting package. For use with both MC-20-60426 and MC-20-76351 risers.
MC-20-61851A3 Manifold to riser 3" spacer (single block). Includes all mounting hardware, gaskets and drain plug.
MC-29-47587 Lower thermostat housing.
MC-29-60372 Upper thermostat housing.
MC47-475KIT Thermostat kit (includes gasket and thermostat).
MC47-27-48043 Direct replacement exhaust manifold end cap / connector gasket (will fit both ends).
MC47-27-52076 Direct replacement exhaust elbow to exhaust manifold gasket.
MC47-27-53354 Direct replacement exhaust manifold to cylinder head gasket.
MC47-27-53354A1 Exhaust manifold gasket set.
MC47-27-73814 Direct replacement exhaust manifold end cap gasket. Utilized with 1-73813 rear end cap.
Note
Manifold includes all plugs, gaskets and mounting hardware to head. Risers include plugs, gasket and mounting hardware to mount to manifold.