Description
Overview of the Tohatsu 3.5hp Outboard Engine
The Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine belongs to Tohatsu’s portable outboard motor lineup designed for small vessels that require reliable and lightweight propulsion.
The engine uses a single-cylinder four-stroke design with approximately 85.5–86 cc displacement, delivering 3.5 horsepower (2.6 kW) for small boat propulsion.
Unlike older two-stroke engines, the four-stroke design provides improved fuel efficiency, quieter operation, and reduced emissions. The engine also includes a digital CD ignition system that improves starting reliability and throttle response.
Its integrated fuel tank allows boat owners to operate the motor without external fuel lines, making it a convenient propulsion solution for portable boats.
Where This Outboard Engine Is Commonly Used
The Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine is commonly used on small boats where portability and reliability are important.
Typical applications include:
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Inflatable dinghies
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Canoes and small fishing boats
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Tender boats for larger vessels
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Small sailboats
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Aluminum utility boats
Because of its lightweight design, the engine is often used as a tender motor for yachts or sailboats where portability and easy storage are essential.
The short shaft configuration is designed for boats with 15-inch transom height, which is a common standard for smaller vessels.
Engine Design and Build Quality
The Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine is engineered using durable marine materials designed to withstand harsh marine environments.
Key design features include:
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Single-cylinder four-stroke engine
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Manual start system
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Tiller steering with twist-grip throttle
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Forward and neutral gear shift
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Integrated 1-liter fuel tank
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Thermostat-controlled water cooling system
The engine includes a four-point vibration absorption system that helps reduce vibration and maintain smooth operation across different engine speeds.
A convenient oil level indicator located on the side of the engine allows users to check oil levels without removing the engine cover.
Why Boat Owners Choose This Outboard
Many boat owners choose the Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine because it combines portability, reliability, and fuel efficiency.
One of the main advantages is its lightweight design. Weighing approximately 18.4 kg (41 lbs), the engine is easy to carry and install on small boats.
Another benefit is its excellent fuel economy. The four-stroke engine design consumes less fuel compared with older two-stroke motors while providing cleaner operation.
Boat owners also appreciate the engine’s simple operation, which includes manual start and tiller steering for direct control.
The Tohatsu brand is widely respected in the marine industry for producing reliable and durable outboard engines.
Is This Outboard Engine Right for Your Boat?
The Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine is ideal for boat owners who need a compact and portable propulsion solution.
This engine is best suited for:
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Owners of small fishing boats
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Inflatable tender operators
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Canoe and dinghy users
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Sailboat owners needing auxiliary propulsion
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Boaters seeking a lightweight portable outboard motor
Because of its compact size and low weight, the engine is easy to transport and store, making it particularly useful for boaters who require portable propulsion.
Technical Specifications
The Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine is designed as a compact portable outboard motor.
Key specifications include:
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Engine type: 4-stroke single cylinder
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Power output: 3.5 hp (2.6 kW)
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Displacement: 85.5–86 cc
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Full throttle range: 5,000–6,000 RPM
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Fuel system: Carbureted with integrated fuel tank
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Fuel capacity: 1 liter internal tank
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Starting system: Manual start
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Steering: Tiller handle
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Shaft length: 15-inch (short shaft)
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Weight: 18.4 kg (41 lbs)
These specifications allow the engine to provide efficient propulsion while remaining easy to transport and operate.
Availability and Support
Outboard motors are a critical component of boat performance and reliability. The Tohatsu 3.5hp 4-Stroke Short Shaft Outboard Engine is supported by Tohatsu’s global dealer network, which provides maintenance services and access to replacement parts.
Tohatsu is one of the world’s largest manufacturers of outboard engines and has built a reputation for producing reliable marine propulsion systems.
Boat owners researching this engine often compare other models within the portable outboard motor category, including engines designed for small boats, tenders, and inflatable vessels.
Frequently Asked Questions
How much horsepower does the Tohatsu 3.5hp outboard produce?
The engine produces 3.5 horsepower (2.6 kW), which is suitable for small boats, dinghies, and tender vessels.
Is the Tohatsu 3.5hp a four-stroke engine?
Yes. This model uses a four-stroke gasoline engine, which provides better fuel efficiency and quieter operation compared with two-stroke engines.
What type of boats can use a 3.5hp outboard motor?
A 3.5hp outboard is commonly used on inflatable dinghies, small fishing boats, canoes, and tender boats.
What shaft length does the short shaft model use?
The short shaft version uses a 15-inch shaft, which fits boats with standard small-boat transom height.
How heavy is the Tohatsu 3.5hp outboard?
The engine weighs approximately 18.4 kg (41 lbs), making it lightweight and easy to transport.
Post-purchase support typically includes access to technical documentation and guidance to assist with installation planning and ongoing operation. This level of support is valuable for buyers who prioritize reliability, ease of use, and long-term ownership confidence.
*Please note: This engine does not come supplied with engine oil and will need to be purchased separately.

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