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Detroit Diesel 2-71 Engine Parts Catalog

Premium Aftermarket Parts for Detroit Diesel 2-71 Engines

The Detroit Diesel 2-71 is a compact, inline 2-cylinder, two-stroke engine from the legendary 71 Series. Known for its mechanical simplicity, rugged design, and long service life, it remains a trusted engine in marine, industrial, and generator applications around the world.

Diesel Pro Power offers a complete selection of aftermarket replacement parts for the 2-71 engine. All parts are engineered to meet or exceed OEM specifications, and we offer worldwide shipping within 24 hours.

Detroit Diesel 2-71 Engine Specifications

Engine Type: Inline 2-Cylinder
Displacement: 142 cubic inches (2.3L)
Cycle: Two-Stroke Diesel
Bore x Stroke: 4.25" x 5"
Aspiration: Naturally Aspirated
Cooling System: Water-Cooled
Applications: Marine auxiliaries, light industrial equipment, generators, compressors

Full Parts Catalog for Detroit Diesel 2-71

Cylinder Kit – Detroit Diesel 2-71

Aftermarket cylinder kits including piston, rings, and liner
Wrist pins, retainers, and seals included
Designed for long service life and proper compression

Gauges – Detroit Diesel 2-71

Oil pressure, water temperature, RPM, and voltage gauges
Available in mechanical or electrical formats
Marine-grade and panel-mount configurations

Engine Water Pump – Detroit Diesel 2-71

Circulation water pumps for engine cooling
Includes gasket and pulley if applicable
Durable cast housing and impeller

Marine Water Pump – Detroit Diesel 2-71

Raw water pumps for marine cooling circuits
Bronze impeller designs for corrosion resistance
Available as complete units or rebuild kits

Cylinder Head – Detroit Diesel 2-71

Remanufactured and aftermarket head assemblies
Includes valves, guides, seats, and springs
Direct bolt-on replacement

Fuel Pump – Detroit Diesel 2-71

Mechanical fuel transfer pumps
Mounting gaskets and flanges included
Aftermarket units built to match OEM fuel flow and pressure

Injector – Detroit Diesel 2-71

Factory-calibrated unit injectors
Includes O-rings, clamps, and fuel return fittings
Fully compatible with stock timing and fuel pressure

Blower – Detroit Diesel 2-71

Roots-style scavenging blower
Remanufactured or new aftermarket assemblies
Includes rotors, shafts, bearings, and seals
Critical for correct air-fuel scavenging in 2-stroke operation

Oil Pump – Detroit Diesel 2-71

Gear-driven oil pumps
Delivers consistent oil pressure across RPM range
Includes relief valve and gasket

Crankshaft – Detroit Diesel 2-71

Remanufactured crankshafts
Precision balanced and magnaflux-tested
Includes thrust washers, keyways, and seal surfaces

Connecting Rod – Detroit Diesel 2-71

Aftermarket forged connecting rods
Bushings and rod bolts available
Sized for direct compatibility with factory crank and piston

Camshaft – Detroit Diesel 2-71

OEM-profile aftermarket camshafts
Designed to match factory valve timing and injector lift
Includes followers, bushings, and thrust plates

Exhaust – Detroit Diesel 2-71

Manifolds for dry and wet exhaust systems
Elbows, outlet adapters, and flange kits
High-heat gaskets and clamps available

Gasket – Detroit Diesel 2-71

Full engine gasket kits (upper and lower)
Head gaskets, intake, oil pan, valve cover, blower, and manifold seals
Heat- and oil-resistant materials

Switch & Solenoid – Detroit Diesel 2-71

Starter solenoids, ignition switches, oil pressure switches
Waterproof and marine-grade options available

Manuals & Tools – Detroit Diesel 2-71

Service manuals, parts manuals, and troubleshooting guides
Specialty tools for injector timing, blower removal, and valve adjustment

Starter & Alternator – Detroit Diesel 2-71

12V and 24V starters
Marine alternators with external or internal regulation
Mounting brackets and wiring accessories

Hose, Clamp – Detroit Diesel 2-71

Coolant, fuel, and oil hoses
Stainless steel marine clamps
High-temp silicone and reinforced rubber options

Fuel Filter – Detroit Diesel 2-71

Spin-on and cartridge-style filters
Filter bases and mounting brackets
Replacement elements with OEM filtration performance

Oil Filter – Detroit Diesel 2-71

Spin-on oil filter kits
Filter heads, bases, and adapters
High-capacity elements for extended service intervals

33C Marine Cable (3/16") – Detroit Diesel 2-71

Marine-grade control cable for throttle and shift
Stainless steel core for corrosion resistance
Compatible with standard lever systems

43C Marine Cable (1/4") – Detroit Diesel 2-71

Heavy-duty marine control cables
Designed for rugged throttle or clutch actuation
Low-friction jacket for smooth travel

Industrial Cable – Detroit Diesel 2-71

Control cables for generator sets, compressors, and stationary engines
Multiple lengths and connection types available

Paint & Sealant – Detroit Diesel 2-71

OEM-color engine enamel paint
Heat-resistant gasket and thread sealants
Spray and brush-on options

Power Take-Off (PTO) – Detroit Diesel 2-71

PTO clutches and drive adapters
Hydraulic pump mounts and accessory plates
Shafts, seals, and housings

Why Choose Diesel Pro Power?

40,000+ satisfied customers worldwide
All parts are aftermarket, engineered to OEM specs
Fast global shipping within 24 hours
Expert support to help you find the right part the first time
User-friendly catalog to quickly navigate to the part you need

Engine Specifications & Applications of the Detroit Diesel 2-71 Engine

Overview: Detroit Diesel 2-71

The Detroit Diesel 2-71 is a compact, two-cylinder, two-stroke diesel engine from the iconic 71 Series—named for its 71 cubic inches of displacement per cylinder. With a total displacement of 142 cubic inches (2.33 liters), this engine was designed to deliver steady, reliable performance in tight quarters and lightweight applications where simplicity, durability, and ease of service are essential.

Unlike the larger multi-cylinder models in the series, the 2-71 excels in low-to-mid power industrial and marine support applications, providing dependable operation in challenging environments. Its simplicity, combined with the global availability of parts from suppliers like Diesel Pro Power, keeps these legacy engines running strong even decades after their original release.

Detroit Diesel 2-71 Engine Specifications

Specification	Value
Engine Configuration	Inline 2-cylinder, two-stroke diesel
Total Displacement	142 cu in (2.33 liters)
Bore x Stroke	4.25 in x 5.00 in
Aspiration	Naturally Aspirated (Roots-style blower)
Horsepower Output	40–60 HP @ 2,100–2,300 RPM (varies by config)
Torque Output	~120–140 lb-ft
Compression Ratio	~17:1
Fuel System	Mechanical unit injectors
Cooling System	Water-cooled
Oil Capacity	~6–8 quarts
Dry Weight	~800–900 lbs
Blower Type	Roots-type (positive displacement)

The 2-71 uses a mechanical Roots blower to scavenge intake air—consistent with all 71 Series two-stroke models—ensuring proper air charge and efficient operation even at low engine speeds.

Key Benefits of the 2-71 Engine

Compact Design: Easily installed in confined spaces where larger engines won’t fit.
All-Mechanical Reliability: No electronics, ECMs, or diagnostics required.
Fuel Efficient at Low Load: Designed to run continuously without excessive consumption.
Easy Maintenance: Parts are field-replaceable with basic tools and service knowledge.
Long Operational Life: Proven to run for thousands of hours with routine service.