1997-2001 – Seakamp SK4825 is designed for Mercruiser Chevy based V6/V8 engines 262-350 C.I.D. stern drives. Works on engines with serpentine belt. Especially designed to take advantage of the low capacity raw water stern drive engines. Heat exchanger has high efficiency four pass design. Extend the life of your engine while protecting it from corrosion with this easy to install, quality built, and uniquely designed heat exchanger cooling system.