ATK Marine Rebuilt Long Block Engines DMK2

$2,400.00

✔ Specifically Engineered for Marine Applications – Built to withstand harsh marine conditions
✔ High-Performance 7.4L (454 C.I.D.) Big Block – Delivers superior torque and power
✔ Remanufactured for Like-New Performance – Completely rebuilt with new components
✔ Heavy-Duty Marine Components – Designed to handle high humidity and extended use
✔ Perfect Replacement for 7.4L Marine Engines – Direct fit for standard rotation engines

💡 Ideal for repowering boats, yachts, and marine vessels!

18 in stock

⚓ ATK Marine Rebuilt 7.4L 454 Big Block Long Block Engine (DMK2) – High-Performance Marine Power!

Name: ATK Marine Rebuilt Long Block Engines DMK2
SKU: 26695
Availability: InStock

🚤 Power up your boat with the ATK Marine Rebuilt 7.4L 454 Big Block Engine!

The ATK Marine Rebuilt 7.4L (454 C.I.D.) Chevy Big Block Long Block Engine (DMK2) is precision remanufactured to meet OEM standards for marine performance and reliability. With marine-specific components such as a heavy-duty camshaft, pistons, rings, and bearings, this engine ensures smooth operation and longevity in marine environments.

⚠️ Designed for standard rotation marine applications. Not for automotive use.

🔹 What’s Included in the ATK Marine 7.4L Long Block Engine?

✅ 7.4L (454 C.I.D.) Remanufactured Marine Long Block – Fully assembled & tested
✅ Heavy-Duty Marine Camshaft – Optimized for marine power & torque
✅ Special Marine Pistons & Rings – Designed for high-performance durability
✅ New Intake & Exhaust Valves – Ensures efficient airflow & combustion
✅ New Main, Rod & Cam Bearings – Long-lasting wear resistance
✅ New Valve Lifters, Rocker Nuts & Swivels – Improves valve train efficiency
✅ Heavy-Duty Double Roller Timing Chain – Ensures timing accuracy & longevity
✅ Cam Sprocket & Crank Gear – Critical for proper function
✅ Freeze Plugs – Built to withstand marine conditions
✅ Oil Pump & Gasket – For efficient lubrication and sealing

⚠️ EXCLUDES intake manifold, water pump, distributor, carburetor, flywheel, flexplate, and spark plugs.

🔹 Technical Specifications

Feature	Details
Brand	ATK Marine Engine
Manufacturer’s Part #	DMK2
Product Type	Rebuilt Long Block Crate Engine
Summit Racing Part #	HME-DMK2
Crate Engine Family	Chevy Big Block
Actual Displacement	7.4L / 454 C.I.D.
Compression Ratio	Standard marine spec
Assembled?	✅ Yes
Camshaft Type	Hydraulic Roller, OE Roller
Cylinder Heads Included?	✅ Yes (Cast Iron)
Fuel System	❌ Not Included (Requires carburetor or EFI setup)
Distributor Included?	❌ No
Valve Covers Included?	❌ No
Timing Cover Included?	❌ No
Oil Pan Included?	❌ No
Harmonic Balancer Included?	❌ No
Water Pump Included?	❌ No
Flywheel Included?	❌ No
Flexplate Included?	❌ No
Air Cleaner Included?	❌ No
Spark Plugs Included?	❌ No
Spark Plug Wires Included?	❌ No
Computer Included?	❌ No
Wiring Harness Included?	❌ No
Supercharger Included?	❌ No
Remanufactured?	✅ Yes
Quantity	Sold Individually

💪 A powerful marine-ready solution for heavy-duty performance!

🔹 Fitment & Compatibility

✔ Direct replacement for 7.4L (454 C.I.D.) marine engines
✔ Ideal for boats, yachts, and marine vessels with a standard rotation engine
✔ Compatible with both carbureted and EFI setups

💡 Confirm compatibility with your boat before purchasing!

🔹 Installation Notes & Recommendations

🔧 Professional Installation Recommended – Ensures proper break-in and long-term reliability
⚙️ Carbureted or EFI Setup Required – Compatible with various marine fuel systems
🔩 Break-In Procedure Required – Ensures optimal performance & longevity

⚠️ Additional components may be required for complete installation.

❓ Frequently Asked Questions (FAQ)

🔹 Is this engine compatible with all 7.4L marine applications?

Yes, it fits standard rotation 7.4L marine engine setups. Verify compatibility before purchase.

🔹 Does this engine come with a fuel system?

No, you need to add a carburetor or EFI setup separately.

🔹 Is a computer required for this engine?

No, this engine does not require a computer or wiring harness.

🔹 What tuning is required?

Proper ignition timing and fuel adjustments are needed for optimal performance.

🔥 Order Your ATK Marine 7.4L (454 C.I.D.) Long Block Engine Today!

🏆 Upgrade your boat with the ATK Marine 7.4L Big Block Long Block Engine!

✔ Remanufactured to OEM Specs for Maximum Reliability
✔ Heavy-Duty Marine Components for Extended Durability
✔ Perfect for Standard Rotation 7.4L (454 C.I.D.) Marine Applications

🛒 ORDER NOW & GET YOUR BOAT BACK ON THE WATER! 🚤💨

ATK Marine rebuilt engines include:

* Special marine pistons and rings
* Special marine camshaft
* Marine gaskets
* New intake and exhaust valves
* New main, rod, and cam bearings
* New valve lifters, rocker nuts, and swivels
* Heavy-duty double roller timing chains
* Cam sprocket
* Crank gear
* Freeze plugs

Overview

Brand:

ATK Marine Engine

Manufacturer’s Part Number:

DMK2

Part Type:

Crate Engines

Product Line:

ATK Marine Rebuilt Long Block Engines

Summit Racing Part Number:

HME-DMK2

UPC:

00653517086786

Crate Engine Family:

Chevy Big Block

Actual Engine Displacement:

7.4L/454

Crate Engine Cylinder Head Material:

Cast iron

Engine Block Material:

Cast iron

Assembled:

Yes

Engine Balance:

External

Cam Style:

Hydraulic roller, OE roller

Rear Main Seal Style:

1-piece

Intake Manifold Included:

Cylinder Heads Included:

Yes

Carburetor Included:

Throttle Body Included:

Distributor Included:

Oil Pan Included:

Valve Covers Included:

Timing Cover Included:

Water Pump Included:

Harmonic Balancer Included:

Flexplate Included:

Flywheel Included:

Air Cleaner Included:

Spark Plugs Included:

Spark Plug Wires Included:

Computer Included:

Wiring Harness Included:

Supercharger Included:

Remanufactured:

Yes

Quantity:

Sold individually.

Notes:

Engine includes oil pump and gasket. Fits standard rotation engines with a four bolt main and oval intake ports