MerCruiser 4 Cylinder 181 Model 140 Exhaust Kit with Elbow Riser MC-20-76351 and 3 Inch Spacer 

Complete Barr Marine exhaust kit for the MerCruiser 4 Cylinder 181 Model 140. Everything listed below is included in this kit, so the complete exhaust setup can be ordered under one part number.

Kit includes:

• (1) MC-1-52390 MerCruiser 4 Cylinder 181 Exhaust Manifold S/N 3332138 and Up. Direct replacement water cooled exhaust manifold. For serial # 3332138 and up. Includes all plugs, gaskets and mounting hardware to the cylinder head. Replaces MerCruiser 52390A1, HGE 2390 and Sierra 18-1961.
• (1) MC-20-76351 MerCruiser 4, 6 Cylinder, V8 Log Elbow Riser. Direct replacement exhaust elbow riser. Not pictured. Includes plugs, gasket and mounting hardware to mount to the manifold. Replaces MerCruiser 76351A2, Osco 6351, Mallory 9-40558, HGE 6351, Sierra 18-1971 and GLM 51120.
• (1) MC-20-61851A3 MerCruiser 4 and 6 Cylinder Riser Spacer Block 3 Inch. Manifold to riser 3" spacer (single block). Includes all mounting hardware, gaskets and drain plug. Each spacer block kit includes the spacer block(s) and the corresponding package to mount. Replaces MerCruiser 61851A3.

Fits MerCruiser 4 cylinder 181 C.I.D. 140 H.P., Model 140 engine (log style direct replacement).

Barr Marine castings have a thicker interior wall, are painted to match original manufacturer colors and are packed in foam for added protection during shipping and storage. Barr manifolds and exhaust connectors are designed to minimize back pressure, and in many cases more r.p.m.''s are achieved after replacing an OEM manifold with Barr replacement parts.

• 3 year limited warranty on Barr exhaust manifolds, risers and exhaust connectors (1 year when used for commercial purposes).

Compatible parts:

• MC-20-60426 direct replacement exhaust elbow riser (utilizes a stainless steel sleeve at the water/air mixing area).
• 1-54870 direct replacement exhaust manifold rear end cap. Serial # 4481625 and below.
• 1-54870P rear end cap mounting package.
• 1-60252 direct replacement exhaust manifold end cap/connector.
• 1-60252P front end plate mounting package.
• MC-1-52390P exhaust manifold mounting package.
• MC-20-55730 stainless steel fresh water cooling block off plate for use with MerCruiser riser #''s 60426, 76351 and 76771. Requires (2) gaskets part # MC47-27-52076.
• MC-20-60207 stainless steel block off plate (with vent hole) for use with MerCruiser riser #''s 60426, 76351 and 76771. Requires (2) gaskets part # MC47-2752076.
• MC-20-60426P exhaust riser elbow mounting package. For use with both MC-2060426 and MC-20-76351 risers.
• MC-29-47587 direct replacement lower thermostat housing.
• MC-29-60372 direct replacement upper thermostat housing.
• 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.
• MC-1-58759 direct replacement water cooled manifold to fit the 6 cyl. GM (Model 165) engine.
• MC-1-65603 direct replacement water cooled exhaust manifold (starboard side).
• MC-1-65604 direct replacement water cooled exhaust manifold (port side).
• MC-1-77234 direct replacement water cooled exhaust manifold (port side).
• MC-1-77235 direct replacement water cooled exhaust manifold (starboard side).
• MC-20-76771 direct replacement exhaust elbow riser.
• MC-20-61851A2 manifold to riser 3" spacers (sold in pairs). Includes all mounting hardware, gaskets and drain plugs.
• MC-1-58759P exhaust manifold mounting package.
• MC-1-58764P manifold to carburetor adaptor mounting package.
• MC-1-6560P manifold mounting package.
• MC-1-77234P manifold mounting package.
• MC-27-48104 alternator mounting bracket.
• MC-29-47441 upper thermostat housing.
• MC-29-62898 upper thermostat housing.
• MC-29-63588 lower thermostat housing.
• MC-29-78984 lower thermostat housing.
• MC47-27-33395 direct replacement exhaust manifold to head gasket.
• MC47-27-33395A2 exhaust manifold gasket set.
• MC47-27-46401 direct replacement manifold to head gasket.
• MC47-27-73866 direct replacement exhaust manifold to head gasket.
• MC47-27-99777-3 direct replacement exhaust elbow to manifold gasket.
• MC47-488 KIT thermostat kit (includes gasket and thermostat).
• MC-1-95862 direct replacement water cooled manifold (Rochester (3 1/4" X 1 7/8") bolt pattern). 6 bolt mounting.
• MC-1-96705 direct replacement water cooled manifold (Rochester (3 1/4" X 1 7/8") bolt pattern). 6 bolt mounting.
• MC-1-99798 direct replacement water cooled manifold (MerCarb (3 11/16" X 2") bolt pattern). 6 bolt mounting.
• MC-20-12076 direct replacement exhaust riser.
• MC-20-76325 direct replacement exhaust riser.
• MC-1-99798P exhaust manifold to cylinder head mounting package.
• MC47-27-96429 direct replacement exhaust manifold to cylinder head gasket.

Composite kit picture Shown is for reference only. See list of included parts above in the description.

Composite kit picture shown is for reference only. See list of included parts above in the description.