ATK Marine DMA1 Ford 351W 5.8L Rebuilt Long Block Engine

Description

Relentless open-water navigation requires the ATK Marine DMA1 Ford 351W 5.8L Rebuilt Long Block Engine and its robust Windsor block casting. Maintain consistent cruising speeds during heavy recreational boating applications. This build utilizes a seasoned 5.8L cast iron architecture to deliver reliable marine propulsion safely.

Key Features of ATK Marine DMA1

• Seasoned 351 CID Cast Iron Block (1-Piece Seal): Establishes a highly rigid foundation to prevent structural flexing under constant hull resistance.
• Corrosion-Resistant Brass Freeze Plugs: Eliminates rust-through risks in raw-water cooled systems to protect the internal water jackets.
• Cast Iron Windsor Cylinder Heads: Dissipates extreme combustion temperatures safely during sustained high-load marine cruising.
• Marine-Calibrated Flat Tappet Camshaft: Engineered specifically to deliver a broad and predictable marine torque curve for steady hull planing.
• Externally Balanced Rotating Assembly: Minimizes harmonic vibrations to protect the crankshaft main bearings from premature wear during extended operation.

Component Breakdown: Marine Rebuilt Long Block

This assembled marine base long block provides a formidable Ford foundation for classic boat repowers.

• A precision machined cast iron block houses a marine calibrated camshaft designed to deliver massive low end torque.
• Heavy duty cast iron cylinder heads improve overall thermal efficiency while thick internal bearings maintain steady oil pressure under constant load.

Vehicle Fitment & Compatibility Matrix

Engineered to replace classic marine engines this 5.8L block aligns perfectly with standard Ford marine motor mounts. Sourcing one of our reliable Ford marine replacement blocks modernizes the propulsion of your vessel instantly.

• Fits classic inboard marine propulsion systems utilizing standard-rotation Ford small block architecture.
• Fits classic stern-drive marine propulsion systems requiring a 351 CID engine replacement.
• Fits vintage runabouts and ski boats looking for an authentic 5.8L marine power upgrade.

Fuel & Ignition System Requirements

Feeding this classic marine engine demands proper fuel tuning and reliable USCG-approved ignition components.

• A marine-approved mechanical fuel pump is required to supply your carburetor while utilizing standard marine-grade fuel prevents pre-ignition under load.
• Heavy duty spark plug wires must be utilized alongside an approved marine distributor to maintain a powerful spark and comply with safety regulations.

Installation, Break-In Oil & Priming Instructions

Proper initial startup procedures are absolutely critical to ensure the survival of the hydraulic flat tappet camshaft and lifters.

• Transfer your existing marine intake manifold using fresh gaskets before manually priming the oil system with a dedicated Windsor priming tool.
• Fill the crankcase with a high zinc break in oil and hold the engine steady at 2000 RPM for 20 minutes to properly seat the flat tappet lifters.

USA Warranty, Emissions & Logistics

Investing in this ATK Marine rebuilt engine secures peace of mind through comprehensive manufacturer backing.

• Backed by a strict 1-Year manufacturer warranty this engine provides excellent protection against internal manufacturing defects when installed properly.
• This assembly requires a valid core exchange of your original marine block and ships securely via LTL freight to commercial addresses.