MerCruiser Exhaust Manifold Rear End Cap 

Direct replacement exhaust manifold rear end cap.

Replaces MerCruiser 73813A1, Osco 54870, Mallory 9-40542 and HGE 4870.

Fits these applications:

• MerCruiser 4 cylinder 181 C.I.D. 140 H.P., Model 140 engine (log style direct replacement).
• MerCruiser straight 6 cylinder Model 165 (log style direct replacement).

• Serial # 4481625 and below.

Compatible parts:

• MC-1-52390 direct replacement water cooled exhaust manifold. For serial # 3332138 and up.
• MC-1-58759 direct replacement water cooled manifold to fit the 6 cyl. GM (Model 165) engine.
• MC-20-60426 direct replacement exhaust elbow riser (utilizes a stainless steel sleeve at the water/air mixing area).
• MC-20-76351 direct replacement exhaust elbow riser.
• MC-20-61851A3 manifold to riser 3" spacer (single block). Includes all mounting hardware, gaskets and drain plug.

Manufactured by Barr Marine. Part number 1-54870.