Mercruiser 98562A6 Riser Reservoir for Mercruiser 3.7-Liter with Aluminum Manifold. Later Production. Fits Mercruiser 3.7-Liter (224 cu.in.) engines with Aluminum Exhaust Manifold number 93174A4, 816219A1 and 816219A5. Note: mounting bolts go thru body of riser and are 4" long. Additional helpful information: the elbow/reservoir is cast iron but the manifold is aluminum. Original equipment made by Mercruiser. 1-year limited warranty. Replaces Sierra 18-1937 and OSCO 8561.