ATK DMA1 Marine Rebuilt Long Block — Ford 351W V8 (5.8L) Marine Engine, 1988–1994
285 horsepower of Windsor torque, rebuilt for the water. The ATK DMA1 is a professionally rebuilt Ford 351W marine engine — the 5.8L / 351 cubic inch small-block Windsor V8 that powered Volvo Penta, OMC and Mercruiser sterndrive packages through the late ’80s and early ’90s. Rated at 285 horsepower with a hydraulic flat-tappet cam, cast iron block and heads, this long block arrives with oil pump and gasket installed — ready to receive your marine intake, carburetor or throttle body, exhaust manifolds and accessories. Crated and shipped fast across Europe from NH Race Engine.
Why Choose the ATK DMA1 Marine Engine?
Ford’s 351W earned its reputation in trucks and Mustangs — but in marine trim it became the backbone of countless sterndrive boats, prized for its stump-pulling torque and simple, durable architecture. A marine engine lives a harder life than its automotive cousin: constant high-RPM cruising, heavy loads, salt or freshwater exposure and long idle periods in humid bilges. That’s why a used marine pull with unknown hours is a gamble — and why rebuilding the one you have makes sense only if the block and heads are sound.
The DMA1 skips all that risk. ATK starts with a sound Ford 351W core from the correct 1988–1994 marine family, then rebuilds it to factory marine specification: 285 horsepower, hydraulic flat-tappet camshaft, cast iron block and heads. Oil pump and gasket are included, and every engine is tested before crating. This is the smart alternative to a used marine pull with unknown hours and salt-water history — or a new complete engine at three times the price.
Key Features & Benefits
- Ford 351W Marine Platform: The torque-rich Windsor small block in correct marine specification — the engine your Volvo Penta, OMC or Mercruiser 5.8 package was built around.
- 285 Horsepower: Factory-rated output matching the original 1988–1994 5.8L marine V8 — your boat performs exactly as designed.
- Hydraulic Flat-Tappet Cam: Correct period-spec cam for dependable marine service with conventional break-in oil.
- Cast Iron Block & Heads: Durable, corrosion-tolerant marine architecture built to handle sustained cruise RPM.
- Marine-Specific Build: Engineered for boating applications — correct sealing and configuration for sterndrive and inboard duty, not a converted automotive block.
- Oil Pump & Gasket Included: Ready for priming at installation — one less marine-grade part to source.
- Rebuilt & Tested: Professionally rebuilt by ATK with pre-dispatch testing and crating for safe transport.
Boat & Drive Fitment — DMA1 Applications
The ATK DMA1 Ford 351W marine engine long block is the correct replacement for 1988–1994 sterndrive and inboard packages running the Ford 5.8L / 351 Windsor:
- Volvo Penta 5.8 installations: AQ-series standard-rotation sterndrive packages
- OMC installations: Cobra and King Cobra drive packages running the Ford 351W
- Mercruiser 5.8 Ford installations: Sterndrive packages originally equipped with the Ford-powered 5.8
- Repower Projects: Ski boats, bowriders, cuddy cabins and runabouts originally equipped with the Ford 5.8 V8
Verify before ordering: Ford marine applications came in multiple rotations and eras, and the 351W family spans decades of running changes. The DMA1 covers 1988–1994 Ford 5.8 / 351W applications. Send us your engine serial number, drive model or casting numbers and our technical team will confirm the DMA1 is the exact match — or identify the correct ATK code if it isn’t.
Technical Specifications
| Part Type: | Marine Engine — Long Block (Rebuilt) |
| Product Line: | ATK Marine Rebuilt Long Block Engines |
| MPN: | DMA1 |
| JEGS Part No.: | 059-DMA1 |
| Engine Family: | Ford 351W / 5.8L small-block Windsor |
| Horsepower: | 285 HP |
| Configuration: | V8, OHV, cast iron block & heads |
| Camshaft: | Hydraulic flat tappet |
| Model Years: | 1988–1994 |
| Oil Pump & Gasket: | Included |
| Air Cleaner / Carburetor: | Not included — transfer from original |
| Assembled: | Yes — sold individually |
| Warranty: | 18 months (per supplier terms) |
What’s Included vs. What You Transfer
| Component | Included | Transfer from Original Engine |
|---|---|---|
| Engine block (rebuilt) | ✅ | — |
| Crankshaft, pistons, rods, bearings | ✅ | — |
| Cast iron cylinder heads & valvetrain | ✅ | — |
| Camshaft & timing components | ✅ | — |
| Oil pump & gasket | ✅ | — |
| Marine intake manifold | — | ✅ |
| Carburetor / throttle body | — | ✅ |
| Marine exhaust manifolds & risers | — | ✅ |
| Ignition distributor & coil | — | ✅ |
| Oil pan (marine) | — | ✅ |
| Valve covers & timing cover | — | ✅ |
| Sea water pump & circulation pump | — | ✅ |
| Harmonic balancer | — | ✅ |
| Flexplate / flywheel | — | ✅ |
| Engine mounts & coupler | — | ✅ |
DMA1 vs. DMA1GTP — Which Ford 351 Marine Engine?
| Feature | DMA1 (This Engine) | DMA1GTP (Performance) |
|---|---|---|
| Horsepower | 285 HP (factory spec) | 285 HP with GT40 heads |
| Cylinder heads | Cast iron OE-spec | GT40 performance heads |
| Compression | Factory | 9.0:1 |
| Fuel requirement | Standard marine fuel | 92 octane minimum |
| Best for | Factory-correct repower & restoration | Performance upgrade & ski/wake use |
Contact us for DMA1GTP availability and pricing if your build calls for GT40 power.
Frequently Asked Questions
Is the ATK DMA1 a drop-in replacement for my Volvo Penta or OMC Ford 5.8?
Yes — for 1988–1994 Ford 351W-powered marine packages. Transfer your marine intake, carburetor or throttle body, exhaust manifolds and risers, ignition, sea water pump, oil pan, balancer, flexplate and coupler from the original engine. Verify your exact application with our team before ordering.
Is my boat’s 5.8 a Ford or a Chevy?
This matters: marine 5.8L engines exist in both Ford (351W) and GM (350) families, and they’re not interchangeable. Check your engine serial number, valve cover shape (Windsor covers are taller and narrower) or send us photos — we’ll identify your engine in minutes.
Does the DMA1 include the carburetor, exhaust manifolds and sea water pump?
No — this is a long block. It includes the assembled block, cast iron heads, valvetrain, oil pump and gasket. Marine intake, carburetor, exhaust manifolds and risers, ignition, oil pan, valve covers, sea water pump, balancer and flexplate transfer from your original engine.
Is a rebuilt Ford 351 marine engine worth it versus a new engine?
For a sound hull with tired power, absolutely — a rebuilt long block typically costs a fraction of a new complete marine engine, and the 351W has decades of proven marine service with parts available everywhere. The savings usually leave budget for the marine installation parts that matter: new manifolds, risers, pumps and gaskets.
Can you help me identify my marine engine?
Yes — send us your engine serial number, drive model (e.g., Volvo Penta AQ, OMC Cobra), or photos of the casting numbers and ID tag. Our technical team identifies marine applications daily.
Recommended Companion Products
- Complete marine installation gasket set
- Marine break-in oil & assembly lubricant
- Sea water pump & circulation pump
- Marine exhaust manifolds & risers
- Marine distributor, coil & plugs
- Marine engine mounts & hardware
- ATK DM29 — Chevy 4.3 V6 marine engine
- All remanufactured & rebuilt engines
What Does It Fit?
Condition & Pre-Delivery Inspection
-
Rebuild process: cleaned, crack-tested, machined to spec, marine-spec internals, dyno-verified
-
Our inspection on arrival in Kessel: crate integrity, rotation confirmation, sealing caps intact, casting numbers checked
-
Your installer should: renew the seawater circulation pump and thermostat housing, use marine-grade oil and a quality gasket set on transfer parts, prime before first start, and follow our installation guides
-
Register your warranty on our warranty registration page
Recommended Companion Products
-
Chevy-powered boat? [ATK DM29 Marine 4.3L V6] [LINK WHEN LIVE]
-
Browse the Marine Engines range [VERIFY slug]
-
Marine engine service [VERIFY slug]
-
Core exchange — ask about returning your old block to reduce the price
Reviews
There are no reviews yet.