GM Vortec 8100 V8 Gas Marine Engine

General Motors Marine Engines

Vortec is the trademarked name for a line of General Motors engines. The Vortec trademark first appeared back in 1988 on a 4.3-Liter, V-6 gas engine that created a vortex of swirling air and fuel in its combustion chambers promoting a better mix of air/fuel. The crate engines are sold to Volvo Penta, MerCruiser, Indmar, and PleasureCraft Marine, who marinize long blocks by adding intake and exhaust manifolds, either a carburetor or fuel injection and marine grade starter and alternator. The Vortec 8100 displaces 8.1 liters, or 496 cubic inches. This engine is no longer manufactured, having been replaced by an 8.2-Liter V-8. See that engine's profile at: MerCruiser 8.2L