Our 50 TLDI® are leading the way of new technology! The Tohatsu 50 TLDI® is one of the smallest outboards in the market with air-assisted, direct fuel injection. This outboard provides exceptionally smooth operation and outstanding performance simultaneously providing brilliant fuel and oil efficiency.

This outboard is every boater’s dream. It is notable that Tohatsu even won the Motorboating magazine’s “Editor’s Choice Award” with this new outboard! We are definitely confident to state that “the 50 TLDI® is the outboard to buy for the 21st century!”.

We have added this new low-pressure air/fuel delivery system to our proven engine block to provide an outboard that is cleaner for the environment while also providing the exceptional performance you expect from a Tohatsu. This compact yet powerful outboard engine provides lower oil and fuel consumption. Our 50 TLDI® weighs up to 15% less than competitor’s 4-stroke outboards and meets all 2006 EPA emission regulations.


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  • Air assisted direct fuel injection system that provides excellent fuel economy
  • Extremely quiet operation
  • Excellent horsepower-to-weight ratio
  • Standard feature of convenient built-in fresh water flush system simplifies routine engine flushing (75C2 model)
  • Lightweight and compact
  • Ultra-low emission, EPA/CARB and EU emission approved

High performance and easy operation

  • Inductive ignition system for reliable starting
  • Outstanding acceleration
  • Oil reservoir located on the top of the motor for quicker and easier refill onboard
  • Multi-point oil injection system to lubricate vital engine components more completely
  • Power Trim & Tilt

Fundamentals for user convenience and reliability

  • Through-the-prop exhaust for a quieter ride
  • Thermostatically controlled cooling system for consistent engine temperature
  • Stainless steel water pump housing for outstanding durability
  • High grade marine aluminum alloy provides the ultimate protection against corrosion
  • Zinc coating on internal water passages for superior corrosion resistance
  • User adjustable idle and trolling speeds

Warning and protection

  • Low oil level warning (visual and audible)
  • Overheat warning (visual and audible)
  • Battery voltage warning (visual only)
  • Start-in-gear protection for safer engine starting
  • Safety lanyard (an essential protection feature equipped on all Tohatsu outboards)
  • Over-rev. limiter
  • High-altitude reinforcement kits available (Option)


How TLDI WorksThe 32-bit ECU (Engine Control Unit) uses its multiple sensors to give precise fuel injection instructions in accordance to the operating conditions it detects. This allows the motor to operate at maximum efficiency, giving boaters a great ride while providing exceptional fuel economy.
*TLDI meets all current regulations stipulated by the EPA (Environmental Protection Agency).


Individual sensors
Individual sensors

6 individual sensors provide constant vital engine information to the ECU for maximum efficiency.
Idle noise reduction system
Idle noise reduction system

The exhaust gases and the sound are routed through the labyrinth exhaust.This process reduces the noise level to a minimum when exiting above the water line through idle port.
Engine Control Unit
Engine control unit (ECU)

The 32 bit engine control unit controls the fuel injection and ignition timing for TLDI® outboards.
Air compressor
Air compressor

One of TLDI®’s essential engine components that is the driving force in achieving stabilized fuel injection.
Direct fuel injection into cylinders
Direct fuel injection into cylinders

Due to the design of the cylinder head chamber and piston dome, the finely atomized fuel mist created by the fuel injector is injected near the spark plugto achieve ideal combustion.

How direct injection system Works
Multifunctional tachometer
Multifunctional tachometer

The tachometer informs the operator of potential problems through the meter indicator and warning lamp. 
Pistons dedicated to TLDI® outboards

Teflon® coated pistons(Equipped on MD 70/90/115) with a concave shape to the head were specifically designed for TLDI® and significantly increase fuel combustion efficiency.
Three step trolling speed control
Three step trolling speed control

The idling speed can be set to any of the three rpm ranges, 700, 800 or 900, by adjusting it on your key switch. This feature allows you to select the ideal trolling speed for maneuvering during a variety of current and wind conditions. 
Freshwater flushing port
Freshwater flushing port

A convenient built-in freshwater flush system on the side of the engine that simplifies routine engine flushing.
High output alternator
High output alternator

Equipped with a high output alternator that produces 37amps of power even at 1,000rpm and a whopping 40amps at wide-open throttle.
Easy maintenance

The TLDI® outboard motors are designed to be simple and have fewer components that need maintenance or service. TLDI®’s does not require oil filter replacements or valve adjustments as compared with four-stroke outboards.


Model / MD50
Type TLDI(Two-Stroke Low-Pressure Direct Fuel Injection)
Maximum output HP (kw) 50 (36.8)
Maximum operating range rpm 5150-5850
Fuel consumption at W.O.T L/Hr (gal/Hr) 16.5 (4.3)
Number of cylinder 3
Bore x Stroke mm (in) 68 x 64 (2.68 x 2.52)
Displacement cc (Cu in) 697 (42.53)
Engine lubrication system Auto Mixing (Mechanical oil pump)
Starting system Electric starter
Spark plug NGK IZFR6J
Ignition timing degree Electroniccally advanced
Alternator output 12V 280W 23A
Engine oil Premium TCW-3 2-Stroke oil
Volume of engine oil L (gal) 2 (0.53)
Fuel tank capacity L (gal) Option 25 (6.6)
Speed control Twist grip type or Remote control
Gear reduction ratio 1.85:1 (13:24)
Emission Compliance EPA & CARB 3-Star
Specifications and descriptions are subject to change without notice.


Standard & Optional Equipments
Type EFTOS / L / UL EPTOS / L / UL
Electric Starter
Engine Stop Switch Lanyard ●*
Power Trim & Tilt
Oil Auto Mixing
Transam 15 / 20 / 25 15 / 20 / 25
Analog Tachometer
Analog Trim Meter
Remote Control Box
25L Plastic Fuel Tank
Tool Kit
Spare Spark Plugs
Owners Manual
● Standard   ○ Optional   * Equip with the remote control box




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