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.
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1. 8759 Manifold. Fits 250 and 292 cu.in. GM in-line six cylinder engines. Replaces Mercruiser # 58759. Use mounting kit 8759-MK.2.

2. 8759-MK Mounting Kit, manifold. Fits 8759 manifold. Includes CY6-GH gasket and mounting hardware.

3.CY6-GH Gasket, manifold to engine cylinder head. Replaces Mercruiser # 27-46401.

4. 58764 Gasket, carburetor adapter to manifold. Replaces Mercruiser # 27-58764.

5. 60252 Front Plate, with water fitting. Replaces Mercruiser # 60252. Use mounting kit 60252-MK.

6. 54870 Rear Plate, without water fitting. Replaces Mercruiser # 54870. Use mounting kit 60252-MK.

7. 60252-MK Mounting Kit, end plate. Fits 60252 and 54870 end plates. Includes 48043 gasket and mounting hardware.

8. 48043 Gasket, end plate. Fits 60252 and 54870 end plates. Included in 60252-MK mounting kit. Replaces Mercruiser # 27-48043.

9. 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.

10. 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.

11. 6371-MK Mounting Kit, riser. Fits 6351 and 6771 risers. Includes 52076 gasket and mounting hardware.

12. 52076 Gasket, riser. Included in 6371-MK and 6325-MK mounting kits.
 

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Please Remember we stock parts and accessories for all makes and models of marine engines and boats. These catalog pages represent just a few of the parts we stock. Use the search field on the right to search by part the Part Number with the abbreviation at the bottom of each page. If you do not find what you are looking for please fill out the info form and we will find the parts you need and respond with a quote.