Product Description

New Barr Marine MC-20-98504 exhaust riser for MerCruiser marine gas engines. This is the less-common 3″ outside diameter outlet riser (accepts 3 inch exhaust hose) with down-angle. Compare part numbers below for accurate fitment. This riser comes with new gasket and hardware. Accepts all original factory accessories and fittings. Each purchase is for one riser.

Riser mating bolt dimensions are 3-7/16″ (87.3mm) by 3-1/16″ (77.8mm) bolt center-to-center.

Cross-referencePart Number
Mercury/MerCruiser98503A2, 98504A3
Barr MarineMC-20-98504
Sierra Marine18-1970, 18-1970-1, 18-1970-2
GLM51110
Osco8503A

About Barr Marine
Barr Marine exhaust manifolds and risers have been proudly made in the USA since 1933. They meet or exceed all OEM quality standards and carry a 3-year manufacturer warranty.

Warning: Cancer and Reproductive Harm – p65warnings.ca.gov
When working with marine exhaust, always wear gloves and eye protection. Solvents, oils, coatings, and debris encountered during installation and maintenance of exhaust parts can cause skin irritation and be harmful to your health.

Shipping and Tracking

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Warranty, Defects, Damage, and Other Problems

  • This item has a 3 Year warranty covering any manufacturer defects.
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Contact

Please read the information above thoroughly before asking a question. Questions are generally answered Monday through Friday, 8am to 4pm PST. All correspondence must be via Email or eBay Message.