Choosing a power unit for a small inflatable boat or a light catamaran always involves finding a balance between power, weight and reliability. boat-engineThe undisputed leader for many years remains the model from the Japanese corporation Yamaha. Yamaha 2 hp (F2) has become the benchmark against which all other devices of this class on the market are compared.
Why is this model so popular among anglers and water enthusiasts? The answer lies in the unique combination of a time-tested two-stroke circuit and advanced noise and vibration reduction technologies. For many owners, this unit is the first step into the world of boating technology that does not require complex registration with GIMS.
However, despite the apparent simplicity of the design, the device has a number of nuances that you need to know before buying. Proper running and knowledge of technical features will help to extend the life of your engine for decades. F2CMHS model for different types of craft.
Technical specifications and design features
The heart of the unit is a single cylinder two-stroke Forced air-cooled internal combustion: 49.6 cubic centimeters of displacement, which allows 2 horsepower at 6,000 rpm, and this configuration provides excellent low-speed traction, which is critical for narrow-arm maneuvering.
The ignition system here is implemented through CDI (Capacitor Discharge Ignition), which eliminates the need to adjust the candle gap and provides a stable spark even in wet weather. The fuel mixture is prepared in a carburetor, where gasoline is mixed with oil in a ratio of 1:50, if high-quality semi-synthetic oil for two-stroke engines is used.
⚠️ Attention: Using pure gasoline without adding oil will cause the piston group to be instantly bullied and the engine to fail.
The dry weight of the structure is only 9.8 kg, making it one of the lightest in its class. Yamaha 2 hp One handed, which is especially appreciated when loading into a car or dragging along the shore, the transom mount is designed for the standard height of the transom, but requires careful installation.
Advantages and disadvantages of the F2 model
Analyzing the feedback from owners and technical documentation, there are a number of undeniable advantages that make this engine a bestseller, first of all, the highest reliability of Japanese assembly and the availability of spare parts in any service center, even after ten years of operation, the engine often starts from the first spurt of the starter.
- 🚤 Economics: Fuel consumption is less than 1 liter per hour at full load, which allows you to take a minimum supply of gasoline with you.
- 🔇 Low noise level: Thanks to the YDT (Yamaha Direct Torque) system and high-quality exhaust system, the sound of the engine does not scare the fish.
- 🛡️ Anti-corrosion coating: All metal parts are protected by a multi-layer coating resistant to salt water.
However, the model has its limitations: a two-stroke scheme requires mixing fuel, which is not always convenient, and the presence of a data-devut and propeller imposes restrictions on use in shallow waters where grass or stones can be caught.
Another disadvantage some users consider the lack of neutral gear in the classical sense - the switching occurs by turning the ramp, which requires addiction, but for a motor of such power it is quite standard and proven control scheme.
Preparation for operation and first launch
Before you get on the water, you need to prepare properly. fuel-mixFor running and further operation, it is recommended to use AI-92 or AI-95 gasoline and a special oil marked TC-W3. Mixing is better done in a separate canister, carefully stirring the contents until a homogeneous emulsion is obtained.
Installing the motor on a transom requires care, you need to make sure that the anti-cavitation stove is parallel to the bottom of the boat or slightly lower, if the stove is too high, you get cavitation and loss of traction, and if it's too low, you get water resistance.
☑️ Check before the first launch
Starting is done by pulling the starter cord. It's important not to make sharp jerks, but to pull confidently and quickly. After starting, let the engine warm up at idle speed for 3-5 minutes. Yamaha 2 hp It should work smoothly, without interruption.
The breaking in process: rules and stages
Running is a critical process that affects the life of the piston group and bearings, and neglecting this step can cut engine life by half, and the manufacturer regulates running for 10 hours divided into several load stages.
In the first three hours of operation, it is not recommended to give full load, the optimal mode is to operate at 30-40% of the power, periodically changing speeds, which allows the parts to get lost in each other without overheating and formation of bullies.
⚠️ Attention: During the break-in (it is strictly forbidden) to keep constant rotation for a long time. You need to periodically change the gas, either adding or decreasing it.
After the first 10 hours of operation, be sure to replace the oil in the gearbox. During the grinding of the gears, metal shavings may appear in the oil, which must be removed, and it is also recommended to check the tightening of all bolt joints, since the vibration of the new motor may weaken them.
What happens if you don't run it?
If you ignore the break-in and give full gas right away, the piston can overheat locally, leading to bullying on the cylinder mirror, at best the engine will lose power, at worst it will require major repairs.
Table of basic technical data
For ease of comparison with the analogues of other manufacturers, we have brought the key parameters into a single table, which will help you to finally determine whether to buy this model for your tasks.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Power | 2.0 | hp (kW 1.5) |
| Weight. | 9.8 | kilogram |
| Tank volume | 0.9 | litre (built-in) |
| Ignition system | CDI | electronic |
| Shifting | Going / Stop / Back | rummel |
As you can see from the table, Yamaha outboard motor 2 hp It has a compact size and a built-in fuel tank, which eliminates the need to carry external containers with you, which is a significant advantage for short-distance walks.
Regular maintenance
To keep the engine faithful for many years, you must follow maintenance regulations, focus on the condition of the spark plug and the purity of the carburetor, at the end of each season, it is recommended to twist the candle and visually evaluate the color of the soda.
Brown or light gray soda indicates normal engine performance; black soda indicates a rich mixture (lots of oil or little air); white indicates a poor mixture, which is dangerously overheating; regular cleaning of the cooling system from algae and sand will also prolong the life of the pump.
When you can preserve for the winter, be sure to exhaust all the gasoline from the carburetor, starting the engine and shutting off the fuel supply tap. Residues of gasoline during the summer can coke and clog the jelly.
The grease is made through special oils located on the lower unit. Use only a special water-resistant lubricant designed for outboard motors. A regular lithole or solidol is quickly washed out with water.
Compatibility with watercraft
With a 2 horsepower capacity, it is enough to confidently drive an inflatable boat up to 3.5 meters long with one to two passengers, and the speed will be about 5-7 km / h, which is ideal for trolling fishing or quiet movement around the water area.
For aluminum boats, the Kazanka or Ob will be an excellent engine for leaving the zone of prohibition or returning home in the absence of wind, but it is worth remembering that glides with a full load at such power are almost impossible to achieve.
- 🎣 Inflatable boats: Ideal for models 2.4 – 3.2 meters long.
- ⚓ Catamarans: They work well on light sailing or rowing catamarans.
- 🛶 Canoe and kayaks: They can be installed on special brackets to increase mobility.
When choosing a boat, take into account not only the length, but also the carrying capacity. Yamaha 2 hp It is not designed to tow heavy loads or move against a strong current with full load.
The optimal length of the boat for the engine 2 hp is from 2.7 to 3.2 meters. For longer vessels, it is better to consider models with a capacity of 4 hp.
Frequently Asked Questions (FAQ)
Do I need to register Yamaha 2 hp in GIMS?
Under current Russian legislation, registration is required for small vessels with a motor of more than 8 kW (about 10.8 hp). Since the power of this engine is only 2 hp (1.5 kW), registration is not required if the total weight of the curb vessel does not exceed 200 kg.
Which oil is best used for the mixture?
It is recommended to use special oils for two-stroke outboard motors labeled TC-W3. Chainsaw or motorcycle oils (JASO FD/FE) may form more soak and do not provide sufficient protection in water-cooled conditions.
Can the motor be kept upright?
Long-term storage in the vertical position is not recommended, since the oil from the gearbox can leak through the glands. It is best to store the motor on a special stand or in a horizontal position on the side indicated in the instructions (usually on the left, when viewed from the side of the daydvut).
What is the maximum speed of a boat with this engine?
Speed depends on many factors: boat length, loading, bottom condition and weather. On average, an inflatable boat with one person will develop a speed of about 6-8 km / h. With two passengers, the speed will decrease to 4-5 km / h.