
Remanufactured Crate Engine for Marine Applications with 1987-1995 Small Block Chevy 350ci/5.7L
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
- Remanufactured Marine Crate Engine
- 1987-1995 Small Block Chevy V8 350ci/5.7L
- 1 Piece Rear Main Seal
- Reverse Rotation
- 260hp Rating
- With Tinware
ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.Please CLICK HERE for ATK Core Return Process
Notes:
- Tinware includes oil pan, front cover, and valve covers
- Block Cast #: 548, 526, 148,638
- Reverse rotation
- Flat tappet cam
- 2 bolt main
- Center-bolt valve covers
- Steel front cover
- 12 bolt intake
- 1 piece rear main seal
Engine Break-In Procedure
Use or break-in oil or conventional (non-synthetic) multi-viscosity oil with zinc additive for the first 30 hours of operation. Avoid hard acceleration for sustained periods. Periodically change the engine speed to help seat the rings. While the engine is running, be sure to check oil pressure and coolant temperature, and check for fluid leaks, such as oil, fuel, and coolant/antifreeze. Also listen for any unusual sounds. Should you hear an unusual sound, shut the engine off, check for the source, and correct it.
Engines with flat tappet cams only - Start the engine and bring it to 2,000 RPM. Get the engine running smoothly. Then vary the engine speed from 1,800-2,200 RPM in a slow acceleration/deceleration cycle for 30 minutes. This is necessary to provide adequate oil splash and lifter rotation to properly mate each lifter to its lobe.
After 30 hours of operation change the engine oil and filter. For flat tappet cam engines, continued use of oil with zinc or a zinc additive for the life of your engine is recommended.
Wide Range of Chevrolet, Chrysler, and Ford Crate Engines for Marine Applications
ATK builds remanufactured crate engines with higher quality than new and this attention to detail and quality will save you time and money by keeping your boat out of the shop and on the water.
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Keep your time on the water smooth and reliable with ATK Remanufactured Crate Engines for Marine—a trusted solution for replacing worn-out powerplants in your boat without compromising on quality or performance. Designed specifically for marine applications, these engines are built to handle the unique demands of watercraft use, including high torque loads, continuous operation, and exposure to moisture.
Each ATK engine is professionally remanufactured using a rigorous process that includes precision machining, replacement of critical internal components, and thorough quality testing. Whether you're upgrading a fishing boat, ski boat, or cruiser, these remanufactured marine engines deliver reliable power and smooth operation where it matters most.
ATK's marine crate engines are built with corrosion-resistant components and marine-specific gaskets and seals, ensuring long-lasting durability in freshwater and saltwater environments alike. They're also designed to match factory specs for popular makes and models, making installation straightforward and hassle-free.
If you're searching for high-quality boat crate motors, ATK offers a reliable, drop-in-ready option backed by a strong warranty and decades of engine-building expertise. These engines are built in the USA and trusted by marine mechanics and DIYers alike.
From weekend adventures to serious offshore cruising, ATK's boat crate motors give you the confidence to hit the water knowing your engine is built to perform. Dependable, affordable, and made for marine life—choose ATK to power your next voyage.

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