This is a brand new Authentic General Motors marine base engine. This 5.7L Marine engine is built strictly for marine use on GM production lines. The price includes the flywheel and intake manifold gaskets. The 5.7L L31 is the premier industrial workhorse, providing the power needed to get the job done without sacrificing fuel efficiency or durability. Includes: Vortec Engine with High Flow Cylinder Heads, Circulating Water Pump, 14" Flywheel, Harmonic Balancer, Oil Pan, Valve Covers, Spark Plugs, and Intake Manifold Gasket Kit. Replaces MerCruiser: 8M0088397, 866138A03, 807449R5, 807449R50, 863661R5, 8M0124238, 866138R03, 8M0124033, and Volvo Penta 3801527.

This is a brand new 5.7L General Motors marine base engine. This 5.7L right hand rotation marine engine is built strictly for marine use on GM production lines.

This is a brand new 6.2L LS3 GM Marine Long Block Engine.

Re-manufactured 2007-2011 Chevy V6 4.3L Marine Crate Engine. ATK Marine Engines offers premium-quality rebuilt long block engines specifically for boating applications. These engines are designed to deliver maximum performance and long-term durability for your boat.