The Tohatsu 90 TLDI® is one of the premier members of our new generation of direct injection outboards. We developed our TLDI® lineup to offer the best possible choice of environmentally aware yet powerful outboards to consumers.

The 90 TLDI® provides significant increases in fuel and oil economy while providing a decrease in hydrocarbon emissions through the exhaust. This in turn gives you clean and quiet boat ride at a minimized operating cost.

The Tohatsu 90 TLDI® gives every boater a truly reliable outboard while providing advanced technology!


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Tohatsu TLDI benefits

  • Air assisted direct fuel injection system 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 (90C2 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 opening 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 / MD90
Type TLDI(Two-Stroke Low-Pressure Direct Fuel Injection)
Maximum output HP (kw) 90 (66.2)
Maximum operating range rpm 5150-5850
Fuel consumption at W.O.T L/Hr (gal/Hr) 27 (7.1)
Number of cylinder 3
Bore x Stroke mm (in) 86 x 72.7 (3.39 x 2.86)
Displacement cc (Cu in) 1267 (77.3)
Engine lubrication system Auto Mixing (Electrical oil pump)
Starting system Electric starter
Spark plug NGK IZFR5J
Ignition timing degree Electroniccally advanced
Alternator output 12V 490W 40A
Engine oil Premium TCW-3 2-Stroke oil
Volume of engine oil L (gal) 4 (1.06)
Fuel tank capacity L (gal) Option 25 (6.6)
Speed control Remote control
Gear reduction ratio 2.33 (12:28)
Emission Compliance EPA & CARB 3-Star




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