Sierra 18-1974-1 Marine Exhaust Riser Elbow for MerCruiser Sterndrives. Replaces Mercury Marine 98502A2. Has 3″ outside diameter outlet (accepts 3 inch exhaust hose) and 0 degree down-angle (no down-angle). Riser mating bolt dimensions are 3-7/16″ (87.3mm) by 3-1/16″ (77.8mm) bolt center-to-center.
About Sierra
Sierra provides premium-quality aftermarket replacements for over 6,000 marine parts, tools, and components. Sierra products are engineered to meet or exceed OEM standards, and stand up in harsh marine environments. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of the product against any defects in workmanship and materials.
