Remanufactured GM 5.7L Marine Engine Replacement for MerCruiser, Volvo Penta, OMC & Crusader

If you're searching for a dependable replacement for your GM 5.7L marine engine, you've come to the right place. The GM 5.7L (350 CID) small block is one of the most popular inboard marine engines ever produced and has powered thousands of boats for decades.

At Eagle Engine Sales, we supply professionally remanufactured GM 5.7L marine engines built to meet or exceed OEM specifications. Whether your boat is powered by a MerCruiser, Volvo Penta, OMC Cobra, Crusader, Marine Power, or another GM-based platform, we can help you get back on the water with confidence.

Why the GM 5.7L Marine Engine Is So Popular

The 5.7L GM small block became the industry standard because it offers an excellent balance of horsepower, durability, fuel economy, and low maintenance costs.

Many boats built from the mid-1990s through today rely on this proven engine platform.

Typical specifications include:

• 350 CID displacement

• 310 HP

• 380 lb-ft of torque

• Cast iron block

• Cast iron cylinder heads

• Hydraulic roller camshaft

• 8-bolt intake manifold

• One-piece rear main seal

• Compatible with multiple marine fuel systems

Whether you use your boat for fishing, cruising, watersports, or commercial work, the 5.7L delivers dependable performance year after year.

Compatible Marine Applications

Our remanufactured GM 5.7L marine engines are available for many popular manufacturers including:

• MerCruiser

• Volvo Penta

• OMC Cobra

• Crusader

• Marine Power

• Indmar

• PCM

• Pleasurecraft Marine

• Malibu

• Correct Craft

• Four Winns

• Sea Ray

• Chaparral

• Larson

• Regal

• Cobalt

• Bayliner

• Rinker

• Monterey

• Crownline

• Many additional GM-based inboard applications

If you're unsure which engine you need, simply provide your engine serial number or boat information and we'll help identify the correct replacement.

What's Included

Our GM 5.7L marine engines include:

• Valve covers

• Composite timing cover

• Oil pan

• Water pump

• Harmonic balancer

• Crankshaft position sensor

Depending on your application, additional components may already be installed or available separately.

Built to Meet or Exceed OEM Standards

Every remanufactured engine undergoes a comprehensive rebuilding process that includes:

• Complete teardown and inspection

• Precision machining

• Cylinder boring and honing

• Deck resurfacing

• Line honing when required

• Crankshaft reconditioning

• Connecting rod reconditioning

• New pistons

• New piston rings

• New rod bearings

• New main bearings

• New cam bearings

• New freeze plugs

• New timing components

• New gaskets and seals

• Upgraded components where applicable

• Final quality inspections

Every engine is built for long-term durability and dependable marine performance.

Common Signs Your 5.7L Marine Engine Needs Replacement

If your engine is experiencing any of these symptoms, it may be time for a replacement:

• Low oil pressure

• Knocking noises

• Excessive oil consumption

• Overheating

• Water intrusion

• Cracked engine block

• Low compression

• Blown head gasket

• Excessive smoke

• Loss of horsepower

Many owners find replacing the engine is more cost-effective than attempting multiple repairs.

Why Buy a Remanufactured Marine Engine?

A professionally remanufactured engine offers significant advantages over a used engine.

Benefits include:

• Like-new reliability

• Lower cost than many new engines

• Updated internal components

• Thorough inspection and machining

• Nationwide availability

• Warranty protection

• Proven durability

Unlike used engines with unknown histories, remanufactured engines are built back to strict specifications.

Why Buy From Eagle Engine Sales?

For decades, Eagle Engine Sales has supplied replacement marine engines to:

• Boat owners

• Marinas

• Repair facilities

• Boat dealerships

• Government agencies

• Commercial fleets

When you order from us, you'll receive:

• Nationwide shipping

• Fast availability

• Experienced sales staff

• Expert application assistance

• Competitive pricing

• Industry-leading customer service

If you aren't sure exactly which engine your boat requires, we'll help identify the correct replacement before you order.

Frequently Asked Questions

How much horsepower does the GM 5.7L marine engine produce?

Most applications produce approximately 310 horsepower and 380 lb-ft of torque, although ratings vary by manufacturer.

Which boats use the GM 5.7L?

Thousands of boats equipped with MerCruiser, Volvo Penta, Crusader, OMC Cobra, Marine Power, PCM, and Indmar powerplants use the GM 5.7L platform.

Can I replace my MerCruiser 5.7 with this engine?

Yes. We supply replacement engines for numerous MerCruiser 5.7 applications. Contact us with your serial number to verify compatibility.

Do you ship nationwide?

Yes. We ship marine engines throughout the United States.

How do I know which engine fits my boat?

Simply provide your engine serial number, engine model, or boat information, and our team will identify the correct replacement.

Conclusion

The GM 5.7L (350 CID) remains one of the most dependable marine engines ever built. Whether your current engine has suffered catastrophic damage or simply reached the end of its service life, a professionally remanufactured replacement offers excellent value, dependable performance, and years of reliable boating.

At Eagle Engine Sales, we're committed to helping you find the correct replacement engine for your boat quickly and confidently.

Call today or request a quote online, and let our marine engine specialists help get you back on the water.

(800) 811-9328