4 HP 4-Stroke Portable Outboard

Model MFS4

When you have a small boat that needs small power, look to Tohatsu’s 4 hp 4-stroke. It provides reliable horsepower while also providing cleaner emissions for you and the environment.

Small in size, this 4 hp has an internal fuel tank built into the motor and a front located fuel tank cap for hassle-free outings on the water. And it includes a built-in external fuel tank connector so you can hook up an external fuel tank for longer outings. Let this Tohatsu 4 hp provide you with the perfect compact, fuel-efficient power you need!

Tohatsu 4-Stroke Benefits:

  • Light and compact!
  • Front mounted shift lever, an industry first in its class!
  • Designed with proven technology
  • Greatly reduced vibration for smooth and stable running at all speeds
  • Greatly reduced induction noise for a quieter ride
  • Ultra-low emission, EPA and CARB 3-Star rating approved
  • 5 Year limited warranty

Easy Operation and Handling:

  • Digital CD ignition for easier engine starting, quicker throttle response and smoother trolling
  • Recoil starter with larger reel making manual starting fast and easy
  • Shallow water drive
  • 6 trim positions
  • Adjustable steering friction for reducing steering effort
  • New longer tiller handle (110mm extension)
  • Newly designed holding grip and larger carrying handle

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 liner for outstanding durability
  • High grade marine aluminum alloy that provides the ultimate protection against corrosion
  • Zinc coating on internal water passages for superior corrosion resistance
  • Aluminum propeller

Warning & Protection:

  • Low oil pressure indicator
  • Start-in-gear protection for safer engine starting
  • Safety lanyard (an essential protection feature standard on all Tohatsu outboards)
  • Over-rev. limiter

Features

1

Engine Control Unit

Front Mounted Shift Lever

The new front mounted shift lever, an industry first in its class, allows for better drivability.

2

Engine Control Unit

Longer Tiller Handle

The tiller handle has been extended 110mm from previous models for easier access and maneuverability.

3

Three step trolling speed control

Larger Carrying Handle and newly designed Holding Grip on bottom cowl

A newly installed holding grip on the bottom of the cowl as well as a larger carrying handle makes transporting this compact model even easier.

4

Engine Control Unit

Integral Tank

With a built-in fuel tank conveniently located on top, the 4 hp becomes ready for cruising quickly and without taking up extra space in the boat. An external fuel fitting also comes standard with this model to allow the motor to hook up to a remote fuel tank as well.

5

Three step trolling speed control

Propeller Hub Exhaust

Through-the-prop exhaust helps reduce engine noise.

Specifications

Engine (No. of Cylinder) 1
Output 4 hp (2.9 kw)
Displacement 123 cc (7.5 cu.in.)
Bore x Stroke 59 x 45 mm (2.32 x 1.77 in)
Starting Manual
Control Type Tiller Handle
Gear Shift Forward - Neutral - Reverse
Gear Ratio 2.15:1
Propeller Selection Range 6" - 9"
Transom Height 15", 20"
Fuel Unleaded Gasoline (87 Octane)
Oil Type NMMA Certified FC-W® 4-stroke oil** SAE 10W-30/40 (SF, SG, SH, SJ)
Oil Capacity 15 fl. oz. (450 mL)
Fuel Tank 0.29 US Gal. (1.1 Lit) Integral Tank
(4hp includes an External Fuel Tank Connector installed on engine to allow user to use an optional external fuel tank)
Weight* 57 lbs. (26 kg)
Alternator Output Optional: 12V, 60W, 5A
Max. RPM Range 4,500 - 5,500
Digital CD Ignition System S
Start In Gear Protection S
Thermostat Controlled Cooling System S
Through-The-Prop Exhaust S
Shallow Water Drive S
Oil Pressure Warning S

LEGEND:

  • S: Standard Features
  • O: Optional on Certain Models
  • * Weight specification is based on the lightest version.

    ** FC-W® is a registered trademark of the National Marine Manufacturers Assoc. (NMMA)

    Specifications and descriptions are subject to change without notice.

    Dimensions

    Parts

    Parts Book Type Brand Model Book Year Book #
    Download 4-Stroke Nissan NSF4A 1999 002N21046-1
    Download 4-Stroke Nissan NSF4A2 2002 002N21046-3
    Download 4-Stroke Tohatsu MFS4A2 2002 002-21046-3
    Download 4-Stroke Nissan NSF4B 2005 002N21046-4
    Download 4-Stroke Tohatsu MFS4B 2005 002-21046-4
    Download 4-Stroke Tohatsu MFS4B 2010 002-21046-6
    Download 4-Stroke Tohatsu MFS4C 2011 002-21046-7
    Download 4-Stroke Tohatsu MFS4C 2012 002-21046-8
    Download 4-Stroke Tohatsu MFS4C 2013 002-21046-9
    Download 4-Stroke Tohatsu MFS4C 2014 002-21046-A
    Download 4-Stroke Tohatsu MFS4C 2015 002-21046-0AE

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