Tohatsu 115 HP Outboard Motor MFS115A ETL

Tohatsu MFS115A ETL 4-stroke outboard engine

This engine has a displacement of no less than 1995 cc, giving this newly developed engine very high torque.

Test boote-magazin.de:
Significantly more thrust: by changing the exhaust manifold in the new model series, Tohatsu has managed to generate significantly more torque in the lower RPM range.

In the outboard motor market, it's difficult to differentiate your product too much from the competition. Of course, in the major BOOTE comparison tests, we always point out strengths and weaknesses in terms of consumption, noise level, and acceleration. The latter is measured by the time it takes to reach a certain speed, and the results can differ by a few seconds. But outboard motors with the same performance otherwise look very similar. None are remarkably stronger than the others, none particularly weaker.

During the development of the new engine series between 75 and 115 hp, the Japanese manufacturer Tohatsu set itself the main goal of distinguishing itself from the market. But how? Should the new engines be even more economical or even quieter than those of the competition? Economical and, of course, quiet. Above all, the new engines should have the highest torque in their class across the entire RPM range and reach their final speed and thus their top speed the fastest.

At the same time, the developers wanted to set aside the old rule that "displacement is nothing but displacement" - because giving the engine more displacement would mean it would become significantly heavier, and weight is always a disadvantage. So they asked themselves how they could increase the engine's power without increasing its displacement and found another way: "Why not design an exhaust manifold that has never been used on an outboard motor?"

 

The task of an exhaust manifold is to evacuate the exhaust gases as effectively as possible. If a manifold is well-designed, it can significantly improve performance, especially in the lower RPM range. Tohatsu calls the result of this long development process "4-2-1 Performance Tuned Exhaust", a geometrically optimized exhaust system. Instead of merging all four exhaust manifolds into one exhaust pipe, as is customary with the 4-1 concept, the exhaust ports of cylinders 1 (top) and 4 (bottom) and those of cylinders 2 and 3 are first merged into two exhaust pipes. These two exhaust pipes then flow into a common pipe. A concept that has long been known in the tuning scene for older cars, but is very unusual for outboard motors in this form.

Merging using the 4-2-1 method with exhaust pipes of exactly the same length creates a suction effect that intensifies the exhaust gas flow from the engine. Simply put, the pistons don't have to struggle to push the exhaust gases out through the valves; a negative pressure assists them. In practice, this simple but intelligent modification results in impressive acceleration behavior and the engine actually reaches its top speed faster.

 

We tested the new 115 hp model on the Elbe and were impressed by the power control, especially in the RPM range between 3500 and 4500 rpm. The high torque is clearly noticeable there. Acceleration feels different from anything known from four-stroke engines of the same size: the boat momentarily lifts its bow, then settles down again and literally starts to run. The test boat, a Valiant V-570 RIB, reaches a speed of 50 kilometers per hour after 6.7 seconds and accelerates further without significant reduction to a top speed of 72 kilometers per hour with the Tohatsu 115 hp.

Tohatsu has even succeeded in meeting all the specifications it set for itself: the Tohatsu MFS115 AETL is well below or in the middle of the field among the Yamaha F115 (2.1L, 163kg), Yamaha F115B (1.8L, 177kg), Suzuki DF115A (2L, 187kg) and Honda BF115 (2.3L, 220kg). Tohatsu offers the best torque-to-weight ratio. Due to its small displacement, the Tohatsu engine is also extremely fuel-efficient. In the engine speed range between 3000 and 3500 rpm, it consumes only 0.32 or 0.35 liters of petrol per kilometer, giving it a theoretical range of 304 kilometers (fuel tank capacity: 100 liters) when planing well. At full throttle, the engine needs almost twice as much fuel (0.62 liters/kilometer), which is also perfectly fine in comparison.

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Speeds

• With a Gemini WR550 RIB with a boat weight of 350 kilograms, you'll travel at a maximum speed of 80 kilometers per hour with a 115 hp outboard motor.
• With a Ryds 630 VI Sport with a boat weight of 690 kilograms, you'll travel at a maximum speed of 74 kilometers per hour with a 115 hp outboard motor.
• With the Reitdieper 730 Tender Sloop 7 meters  with a boat weight of 870 kilograms, you'll travel at a maximum speed of 57 kilometers per hour with a 115 hp outboard motor.

Displacement
As a rule of thumb, for fast boats, you need 1 hp for 10 to 20 kilograms of total weight. Based on this, this outboard motor is then suitable for 1 to 2 tons total weight.
For displacement boats, 1 hp per 150 kilograms to 200 kilograms is sufficient; then the engine is sufficient for 17 tons to 23 tons total weight. 

Tohatsu 115 HP outboard motor MFS115A ETL
The MFS115's design is based on the best-selling models, the MFS40/50/60 and the MFS9.9/15/20. The legacy of the highest performing and most reliable engines has been passed on with a dynamic design and refined details to our all-new MFS115 4-stroke outboard motor with industry-first innovative features.

The groundbreaking technology, the 4-2-1 Performance Tuned Exhaust, offers unrivaled torque across the entire RPM range. The higher the torque, the better the hole-shot, which translates into higher speeds. Higher torque also means less resistance, which in turn means more boating options; it can be applied to any type of boat. From light to heavy, pleasure or commercial boating.

The synergy between the 4-2-1 Performance Tuned Exhaust and our precisely tuned ECU programming, the MFS115, provides strong acceleration when needed to get the boat planing faster and enable you to reach top speed quicker.

Equipped with standard features such as Variable Idle System allowing you to change the idle speed from 650 to 850 RPM, a low gear ratio (2.08:1) giving you the higher low-end torque your boat needs, a freshwater flush system designed to simplify routine flushing, and a powerful 41 amp alternator, the MFS115 delivers the class-leading features you expect from Tohatsu.

Standard features include:
• Variable idle system to adjust idle speed from 650 to 850 RPM, in 50 RPM increments, for improved trolling line control
• Low gear ratio (2.08:1) provides low-end torque and better top-end performance
• Freshwater flush system designed to make routine flushing easier

 

SPECIFICATIONS

• Power 115 hp
• Lubrication 4-stroke
• Weight 178 kilograms
• Starting Electric
• Steering type Remote control or tiller
  
• Gear shift Forward - Neutral - Reverse
• Fuel system Injection
• Number of cylinders 4
• Displacement 1995 cm3
• Maximum power 85 kW
• Full throttle operating speed 5150-5850 revolutions per minute
• Bore x stroke 84x90 mm
• Trim/tilt method Powertrim - Manual trim/tilt
• Shaft length L (20'' = 51 centimeters)
  
  

At Marinaut included:

• Rigging cord kit B standard vertical mounting panel without control box/remote control (item number 3YU-84556-1).
• • tachometer*
  • trim gauge**
  • wiring harness
  • ignition switch
  • kill switch
  • communication cable kit. 
    
    
  • or upon request Side mount kit B Side mount control box with mounting kit, tachometer, trim gauge, wiring harness with ignition switch and kill switch, communication cable kit (item number 3UH-84555-1).
    
    
  • Trim gauge*  (2" diameter) shows the engine angle for optimal performance and efficiency. Features a domed lens to minimize glare in direct sunlight, a fog and scratch resistant coating, and chrome bezel.
  • Tachometer** with a speed of 7,000 rpm (diameter of 10 centimeters) has a chrome bezel and is illuminated for good visibility in the dark. Features a domed lens to minimize glare in direct sunlight and a fog and scratch resistant coating. The tachometer informs about possible issues, such as low oil pressure, low battery, and overheating, via the built-in warning lights.
  • propeller/propeller aluminum with 3 blades and hub kit (connection between the propeller and the propeller shaft) aftermarket*. 
    • 24 liter fuel tank with fuel hose with pump bulb aftermarket (55 liter extra charge 195,-
    • engine oil

    • delivery inspection.
      Valued at 475 euros.

• *or propeller OEM Tohatsu aluminum with 3 blades and hub kit Surcharge 419,-. 

  Available propeller sizes: 

	Displacement	Diameter	Pitch			Item number
	Light	13.2	21			3HKB64545-0
	Light	13.2	19 (most supplied)			3HKB64541-0
	Medium	13.3	17			3HKB64536-0
	Medium	13.5	15			3HKB64532-0
	Medium	13.7	13			3HKB64527-0
	Heavy	14	11			3HKB64523-0
	Heavy	14	9			3HKB64518-0

 

BENEFITS

• Dynamic design with refined details 
• Exciting boating performance
• Superior durability and optimized weight
• Excellent fuel economy due to unique SOHC-4V design
• Performance-inspired engine sound and quietest at idle
• Tuned ECU programming
- Available in long (20”) & ultra long (25”) shaft lengths

High performance and easy operation

• 4-2-1 Performance Tuned exhaust generates high torque to get you on plane faster
• A precisely tuned ECU provides strong acceleration when needed
• Electronic fuel injection
• MicroComputer Programmed ignition system for faster starting
• Powerful 41 amp alternator
• New and improved gearcase with wider anti-ventilation plate
• Adjustable steering friction and trim tab for reduced steering effort
• Power trim and tilt

 

Fundamentals for user convenience and reliability

 

FEATURES

4-2-1 Performance Tuned exhaust
Isometric aggregated exhaust manifold "4-2-1 Performance Tuned Exhaust" maximizes torque and acceleration performance. This unique design is an industry first and is only found on Tohatsu outboard motors. By designing each exhaust passage to be of equal length, the merging of the exhaust from each cylinder creates additional suction that helps to draw the exhaust from the engine. This completely eliminates the possibility of exhaust interference and dramatically improves performance.
Video with details available on this page.

Excellent torque
From the 4-2-1 Performance Tuned exhaust, the MFS75/90/100/115 has the highest torque, allowing you to get on plane faster and reach top speed quicker than all other competitors.

**Data based on research conducted and compiled by Tohatsu Engineering Department

Superior durability and optimized weight
For high durability and weight reduction, Tohatsu has optimized every relatively heavy component, such as cylinder head, exhaust manifold, engine base, oil pan, lower unit, etc. A special anodized process has also been used on all major aluminum components for a longer engine life.

Excellent fuel efficiency
MFS75/90/100/115 has a unique SOHC-4V design in its class, where competitors are either SOHC-2V or DOHC-4V. Spark plugs are strategically placed in the center of each combustion chamber for the most efficient combustion with optimal heat conduction, resulting in strong performance and fuel efficiency.

Quiet engine
With its equal length intake manifold, 4-2-1 Performance Tuned exhaust, and precisely tuned ECU, the MFS75/90/100/115 delivers an exciting and performance-driven engine sound. Also, within the large-capacity Idle Port, sounds reflect off each other to dampen the exhaust flow, contributing to the lowest idle noise.

Maneuverability
With its refined ECU programming, the MFS75/90/100/115 is designed to improve acceleration when needed to get the boat on plane faster. When you open the throttle too wide, the ECU recognizes this and ignites simultaneously in all four cylinders. At the same time, the ECU optimizes and delivers sufficient air and fuel, making the air/fuel mixture more suitable for rapid acceleration to generate higher torque. The higher the torque, the stronger the acceleration you get, resulting in improved hole-shots and thus faster planing. (Click here) Also, the upper and lower mounts and the gearbox are optimized for direct steering response and maneuverability and greater stability.

 

Option: TOCS 4.3 inch LCD color screen with information about:

• Engine speed
• Engine operating temperature
• Battery voltage
• Fuel consumption
• Tilt/trim gauge*
• Total engine operating hours
• Total fuel consumption
• Fuel tank level(s)
• Current consumption
• Course/speed
• Various warnings
• Self-diagnosis system

With NMEA2000, J1939 CAN Bus and coupling.

It is also possible to order a package of original Tohatsu analog built-in gauges for the same price; tachometer, speedometer, hour meter, trim meter, voltmeter and fuel gauge.

WHY TOHATSU

• Tohatsu from Japan has been around for over 100 years and produces over 200,000 outboard motors per year. TOHATSU is the largest outboard motor manufacturer in the world.
  
  
• Tohatsu has more than 10 percent market share in the Netherlands and is growing fastest in market share in the Netherlands. For models up to 30 hp, it already has more than 20% market share!
  
  
• Did you know that Mercury even has outboard motors up to 30 hp manufactured by Tohatsu? The only difference is the casing and the price.
  The Tohatsu BFT models from 150 hp onwards have been rebranded Hondas since 2014. So you get a reliable Honda engine at a Tohatsu price.
  

• Tohatsu engines have the highest quality and a lower price than other A-brands. Tohatsu is also the only brand that exclusively produces outboard motors, so it is truly specialized.
  
  
• Tohatsu pays a lot of attention to the appearance of its outboard motors, and this is reflected in this model. The look is tough and robust. Under the beautifully streamlined cowl, you'll find the familiar Tohatsu technology, developed for years of boating pleasure with minimal maintenance.
  
  
• The Tohatsu engine is user-friendly in all respects. For example, the oil filter is positioned so that you can easily replace it yourself. The lubrication of your outboard motor is optimal thanks to the generous oil reservoir. By applying the proven Tohatsu electronic injection system, your engine starts smoothly and the throttle response is quick. The engine speed can be smoothly controlled.
  
  
• Your newly purchased Tohatsu outboard motor comes with a full 5-year factory warranty.
  

• Tohatsu always performs well in comparative tests.
  • Read the test reports for the 15 and 30 and 60 hp engines. Tohatsu is the price-performance winner according to Boote Testen.
  • The ANWB 'Waterkampioen' also carried out an Outboard Motor Test. The Tohatsu 6 hp emerged as the winner, based on factors such as weight, noise, and ease of use. According to the ANWB, buying a Tohatsu 6 HP outboard motor is the best choice.
  • Boote-Magazin.de also tested the Tohatsu MFS115 A : impressive result due to the best torque-to-weight ratio and higher top speed. Due to its small cylinder capacity, the Tohatsu is also extremely fuel-efficient.
• Most models are available from stock!

That's why Tohatsu is the best outboard motor.

Tohatsu pays a lot of attention to the appearance of its outboard motors, and this is reflected in this model. The look is tough and robust. Under the beautifully streamlined cowl, you'll find the familiar Tohatsu technology, developed for years of boating pleasure with minimal maintenance. The engine is user-friendly in all respects. For example, the oil filter is positioned so that you can easily replace it yourself. The lubrication of your outboard motor is optimal thanks to the generous oil reservoir. By applying the proven Tohatsu electronic injection system, your engine starts smoothly and the throttle response is quick. The engine speed can be smoothly controlled.

WARRANTY & DELIVERY TIME

Your newly purchased Tohatsu outboard motor comes with a 5-year full factory warranty. This gives you solid assurance of worry-free boating. You will receive the warranty certificate with your purchase. Technical defects that occur within the warranty period and fall under the warranty conditions will be remedied free of charge.

VERSIONS:

• ETL: E: electric start, T: remote control and power trim, L: Long shaft.
  For steering wheel control, both moncable and hydraulic. With powertrim and tilt, you can optimize the tilt angle of the engine at the push of a button. The trim gauge allows you to quickly read whether the engine angle is correct. This gives you faster acceleration, smoother, faster, more economical, more stable, and most importantly, safer sailing. Also convenient for trailering.
  
  
• EFTL tiller Multifunctional tiller handle with Big Multi Tiller C handle (see images) with PTT switch on the handle.
  This provides electric start and power trim for the outboard motor, without the need for a steering function with remote control.
  An ergonomically designed large shift lever on the front and a longer throttle grip with a PTT (Power Trim & Tilt) switch at the end of the grip for easier operation and maneuverability. To balance various wind and current conditions, the Variable Idling System allows the user to select the best idling speed from 5 different RPM ranges by simply pressing the key switch.
  - Ergonomically designed shift lever.
  - Longer Throttle grip with 110 degrees rotation for maneuverability
  -Throttle Friction function for fine-tuning tiller comfort
  -Steering Co-Pilot for steering control.
  -Warning lights, key switch, and tilt and trim switch (in the grip) easily accessible
  - Available in Aqua Blue part number 3SSQ63000-2 or Belgua White part number 3SSW63000-2. Surcharge 395,-
  
  
• W: White surcharge 695,-

• At Marinaut, it's complete, including:

  • Trim gauge: (2" diameter) shows the trim position of the engine for optimal performance and efficiency. Features a domed lens to minimize glare in direct sunlight, an anti-fog and scratch-resistant coating, and chrome bezel.

  • Tachometer: with a speed of 7,000 rpm (10-centimeter diameter), has a chrome bezel and is illuminated for good visibility in the dark. Features a domed lens to minimize glare in direct sunlight and an anti-fog and scratch-resistant coating. The tachometer informs about potential problems, such as low oil pressure, a nearly empty battery, and overheating via the built-in warning lights.

  • Standard vertical mounting panel (part number 3ZG-84556-0)
    • without remote control
    • with wiring harness with ignition switch and kill switch
    • communication cable kit
      or upon request:
    • side-mount remote control with power trim (part number 3ZG-84555-0)
    • wiring harness with ignition switch and kill switch
    • communication cable kit
  • 3-blade aluminum propeller and hub kit (connection between the propeller and the propeller shaft) aftermarket*.
  • 24 liter fuel tank with fuel hose and priming bulb aftermarket (55 liter surcharge 195,-
  • engine oil

  • delivery inspection.
    Valued at 475 euros.

• *or propeller OEM Tohatsu aluminum with 3 blades and hub kit Surcharge 419,-.

  Available propeller sizes:

	Displacement	Diameter	Pitch			Part number
	Light	13.2	21			3HKB64545-0
	Light	13.2	19 (most supplied)			3HKB64541-0
	Medium	13.3	17			3HKB64536-0
	Medium	13.5	15			3HKB64532-0
	Medium	13.7	13			3HKB64527-0
	Heavy	14	11			3HKB64523-0
	Heavy	14	9			3HKB64518-0

Choose a lower pitch for heavier boats: higher acceleration (for water skiing/wakeboarding). Higher pitch for lighter boats: higher speed.

If the RPMs are too low at full throttle, a smaller pitch can lead to higher top speed and acceleration. 1 pitch size makes approximately a difference of 200 to 300 RPM. NB, choosing too low a pitch can lead to exceeding the maximum RPM and thus engine damage.

Also, with a larger diameter you can achieve more pulling power and more RPMs, and with a smaller diameter less pulling power and more RPMs.

• Trade-in is possible
• Delivery time in consultation. Please contact us by phone at +31(0)24799804 , by email info@marinaut.nl or via chat (bottom right).
• View the brochure and the manual