Free - Detroit 2-71 Troubleshooting Guide

Parts for Detroit Diesel 271

-
Select Parts Category

Free - Detroit 2-71 Troubleshooting Guide

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.