Osco Marine Manifolds
Since 1932
OSCO Motors Co. has been in the business of providing boaters with a high quality, reasonable cost alternative to original manufacturer's equipment.
All manifolds come with a 3 year warranty and DO NOT include gaskets. Order gaskets and bolts separately. We stock all OSCO manifolds and ship the same day.
Click on Picture or Part Number to Check Price

<previous catalog page

next catalog page>

1. 5604 Manifold, port. Log style manifold fits 302 - 351 cu.in. Ford small block V8 engines. Replaces Mercruiser #’s 54100 and 65604. Use mounting kit 560-MK.

1. 5603 Manifold, starboard. Log style manifold fits 302 and 351 cu.in. Ford small block V8 engines. Replaces Mercruiser #’s 54099 and 65603. Use mounting kit 560-MK.

2. 560-MK Mounting Kit, manifold. Fits 5603 and 5604 manifolds. Includes FL-GH gasket and mounting hardware.

3. FLGH Gasket, manifold to cylinder head. Included in 560-MK mounting kit. Replaces Mercruiser # 27-73866.

4. 6351 Riser, 3" exhaust outlet, 90º down angle. For use in most inboard/outboard applications. Replaces Mercruiser #’s 76351, 60426 and 49964. Use mounting kit 6371-MK.

5. 6771 Riser, 3" exhaust outlet, 0º down angle. For use in most inboard applications. Replaces Mercruiser #’s 76771 and 60427. Use mounting kit 6371-MK.

6. 6371-MK Mounting Kit, riser. Fits 6351 and 6771 risers. Includes 52076 gasket and mounting hardware.

7.6371-MK-SP Mounting Kit, riser. Fits 6351 and 6771 risers. Includes 60207 stainless plate with weep hole, (2) 52076 gaskets and mounting hardware. Not for fresh water/closed cooling systems.

8. 52076 Gasket, riser. Fits 6351 and 6771 risers and 1851 spacer. Included in 6371-MK, 6371-MK-SP and 1851-MK mounting kits. Replaces Mercruiser # 27-52076.

9. 60207 Stainless Plate, with weep hole to remove air trapped in the manifold. Fits 6351 and 6771 risers. Not forfresh water/closed cooling systems. Replaces Mercruiser # 60207. Requires (2) 52076 gaskets, or order 6371-MK-SP.

10. 60252 End Plate, with water fitting. Replaces Mercruiser # 60252. Use mounting kit 60252-MK
.
11. 54870 Rear Plate, without water fitting. Replaces Mercruiser # 54870. Use mounting kit 60252-MK.

12.60252-MK Mounting Kit, end plate. Fits 60252 and 54870 end plates. Includes 48043 gasket and mounting hardware.

13. 48043 Gasket, end plate. Fits 60252 and 54870 end plates. Included in 60252-MK mounting kit. Replaces Mercruiser # 27-48043.

14.1851 Spacer, 3" rear riser. Fits 5603 and 5604 manifolds with 6351 or 6771 risers. Replaces Mercruiser # 61851. Use mounting kit 1851-MK.

15.1851-MK Mounting Kit, spacer. Attaches 6351 or 6771 riser and 1851 spacer to 5603/5604 manifolds. Includes (2) 52076 gaskets and mounting hardware.




.




 

<previous catalog page

next catalog page>