Outboard Motors kamisu (Kamisu) has been a top budget choice for fishermen and small boat owners for the past 5 years. The brand, originally positioned as an alternative to Japanese giants, now offers a range of engines from 2.5 to 20 hp, combining affordable prices and Russian-adapted performance. kamisu Can you compete with them in terms of key parameters?

In this article, we will discuss:

  • 🔍 Technical features motor kamisu What is hidden under the hood and what technologies are used by the manufacturer.
  • 💰 Comparison with analogues (Yamaha, Toatsu, HDX) at price, resource and maintainability.
  • ⚙️ Step-by-step instruction installation and setting of the motor on the transom of the PVC or aluminum boat.
  • 🔧 Typical malfunctions and ways to eliminate them without contacting the service.

We'll pay special attention. The unique cooling system of the Kamisu series engines EcoPower, which, according to the manufacturer, reduces the risk of overheating by 30% when operating in shallow water bodiesThis is true for most Russian regions, where rivers and lakes often do not exceed 1.5-2 meters.

1. Technical specifications of outboard motors Kamisu

Motor lineup kamisu presented by two- and four-stroke gasoline models with a capacity of 2.5 to 20 hp All engines are certified for use on small craft in Russia and meet environmental standards Euro-5 (for four-stroke versions) Let's look at the key parameters in the most popular models:

Model Type Power (hp) Engine volume (cm3) Weight (kg) Max. revolutions (rpm) Recommended volume of the boat (m3)
Kamisu KM-2.5BS two-stroke 2.5 52 12.8 5000–5500 2.5
Kamisu KM-5BMS two-stroke 5 86 21.5 5000–5500 up to 3.5
Kamisu KM-9.9FHS four-stroke 9.9 212 38.5 5000–5500 4.8
Kamisu KM-15FMS four-stroke 15 333 47.0 5000–5500 6.0

Feature of motors kamisu use aluminum alloys with the addition of silicon This reduces weight by 8 to 12 percent compared to the equivalent, but requires more careful control of the temperature. KM-9.9FHS It is equipped with an overheating sensor that automatically reduces the speed of the engine when the critical temperature is reached (105 ° C).

It is important to bear in mind that two-stroke (KM-2.5BS, KM-5BMS) require mixing of oil with petrol in proportion 1:50and four-stroke (in the case of theKM-9.9FHS, KM-15FMS) run on clean petrol AI-92 They have a separate oil crankcase, which is preferable for long trips, because they have 20 to 25 percent lower fuel consumption.

📊 What type of motor do you use?
Two-stroke
Four-stroke
Electric motor
While I choose.

2. Comparison of Kamisu with analogues: Yamaha, Toatsu, HDX

The main question that concerns buyers: is it worth saving on the kamisuIf you can take a test-checked Yamaha or ToatsuLet's compare the key criteria:

  • 💵 Price.Motors kamisu It's 25 to 40 percent cheaper. Kamisu KM-9.9FHS It costs about 85,000 rubles, while similar Yamaha F9.9FMH - from 130,000 rubles.
  • ⚙️ Resource: Guarantee period y kamisu - 2 years old Yamaha The reviews say that motors can nurse 1,500 to 2,000 hours of motors with the right maintenance.
  • 🔧 Repairability: Parts for kamisu They're cheaper, but they're inferior to Japanese brands. KM-5BMS It will cost 3,500 rubles, for Toatsu M5BS - at 5,200 rubles.
  • 🛠️ Service: Four-stroke models kamisu Require oil change every 50 hours (y) Yamaha - 100 hours.

According to the results of tests of the magazine "Boats and Yachts" (2023), engines kamisu They showed stable operation at temperatures from -10 °C to +35 °C, but during long-term operation at maximum speeds (more than 1 hour), there was an increase in vibration. Yamaha and Toatsu They kept their course smooth even after 2 hours of continuous operation.

⚠️ Attention.: In choosing between kamisu And in Japanese, consider the intensity of use. If the motor will run more than 100 hours a year, it's better to consider the intensity of use. Toatsu or Yamaha - their resource is higher by 30-40%. For rare trips (up to 50 hours / year) kamisu This will be the best budget decision.
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Before buying, check the availability of a service center. kamisu Despite the simplicity of the design, some work (such as adjusting the carburettor) is better left to the professionals.

3. Step-by-step instructions for installing the motor on the boat

Installation of the engine kamisu On the transom of a PVC or aluminum boat, several key rules must be followed. lower unitWe're going to look at this process, and we're going to look at this as a model. Kamisu KM-5BMS:

  1. Preparation of the transanche: Make sure that the boat's slingboard is at least 18 mm thick (for PVC) or 3 mm thick (for aluminum). For motors over 5 hp, it is recommended to reinforce the transom with an additional plywood or aluminum profile lining.
  2. Motor attachment:
    • 🔩 Secure the motor on the transom with regular rods, making sure that they fit tightly to the board.
    • 📏 Adjust the height of the lower unit: the anti-cavitation plate should be 2-3 cm below the level of the bottom of the boat.
    • 🔧 Tighten the fastening bolts with a force of 12-15 N·m (use a dynamometer key).
  3. Control connection:
    • 🎛️ For remote control (models) KM-9.9FHS above) connect the gas and reverse cables according to the scheme in the instruction.
    • 🔌 Make sure the gas handle runs smoothly, without jamming.
  • Pre-launch checks:
    • ⛽ Fill the engine with fuel (for two-stroke – a mixture of gasoline and oil in proportion) 1:50).
    • 💧 Check the oil level in the gearbox (for four-stroke models).
    • 🔊 Make sure there is no extraneous noise when manually turning the screw.

    Are the mounting rods tightened?|Antiquatization plate below the bottom by 2-3 cm?| Fuel and oil filled?| Control cables connected without inflections?|The screw rotates freely?->

    After installation, be sure to follow break-in:

    • 🚤 For the first 2 hours of operation, avoid speeds above 3/4 of maximum.
    • 🛑 Stop the engine every 15 minutes for 2-3 minutes to cool.
    • 🔄 After running, replace the oil in the gearbox (even if it is new).
    ⚠️ Attention.If the engine vibrates or makes uncharacteristic sounds after installation, stop it immediately and check:
    • 🔹 The ratio of lower unit and transom (a distortion of more than 2 mm is unacceptable).
    • 🔹 Puffing up the fasteners.
    • 🔹 Integrity of the propeller blades (even a small crack can cause imbalance).

    4. Maintenance and typical malfunctions

    Regular maintenance (TO) - the pledge of long service of the motor kamisuThe manufacturer recommends the following schedule:

    Type of work Frequency What do you do?
    Replacement of oil in gearbox Every 50 motor hours Use the oil. SAE 80W-90 (for example, Liqui Moly Marine Gear Oil).
    Cleaning of spark plugs Every 100 motor hours Check the gap (should be) 0.7-0.9 mm).
    Flushing of the cooling system Once a season Use fresh water under low pressure.
    Adjustment of the carburetor At unstable speeds Configure the screws of quality and quantity of the mixture.

    Among the typical engine failures kamisu Owners are most often faced with the following problems:

    • 🔥 Overheating: The cause is clogging of the water intake holes or a malfunctioning pump, solution: flush the cooling system and replace the impeller.
    • 🔊 Extraneous noise in the gearbox: Usually associated with wear and tear of bearings or lack of oil. Solution: replace the oil and inspect the gears.
    • 🛢️ Increased fuel consumption: The culprit is a clogged carburetor or worn piston rings. Solution: cleaning the carburetor or replacing the rings.
    • 🔋 A faint spark.: Problem is candles, ignition coil or wiring. Solution: check the resistance of the coil (should be) 0.3-0.5 Ohm).

    For the diagnosis of malfunctions can be used error-codewhich are displayed on the display (for models with electronic control, for example, KM-15FMS):

    

    E1 - No spark on candles
    

    E2 - Overheating of the engine
    

    E3 – Low oil pressure (for four-stroke)
    

    E4 - Throttle position sensor error
    How to check compression in cylinders?

    To check the compression, you'll need a compressometer.

    1. Turn the spark plug.

    2. Insert the tip of the compressometer into the candle hole.

    3. Scroll the engine with a starter (or manually) and fix the maximum value.

    4. Normal compression for motors kamisu:

    - two-stroke: 8-10 kg/cm2

    four-stroke: 10-12 kg/cm2

    If the compression is below normal by 20% or more, repair of the piston group is required.

    5. Tuning and modernization of Kamisu engines

    Many owners are trying to improve the performance of their engines. kamisuAnd especially if you're talking about speed or efficiency, let's look at the most efficient and safest ways to tune.

    • 🚀 Rotor replacement: Standard screw on KM-5BMS step 9.25"Installation of the screw with pitch 7" increase the thrust at low speeds (relevant for heavy boats), and the screw with a step 11" It will add a maximum speed of 5-7 km / h.
    • ⚡ Electronic ignition installation: For two-stroke models (KM-2.5BS, KM-5BMS) a contactless ignition system (e.g., BOSCH Marine), which will improve the launch in cold weather.
    • 🔧 GBC channel polishing: Increases power by 5-10% through improved gas dynamics, requires precision processing and better trust in professionals.
    • 🛢️ Use of synthetic oil: For four-stroke engines (KM-9.9FHS) oil transition Motul Outboard Tech 10W-40 reduces wear by 15-20%.

    But not all modifications are safe. cylinder-plug To increase the volume can lead to overheating and reduction of engine life.

    • 🔥 Installation of turbocharging (engine design) kamisu not designed for high blood pressure.
    • ⚡ Change the standard cooling system (risk of overheating).
    • 🔧 Use screws with a diameter greater than recommended (may damage the gearbox).
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    The best way to increase the speed of the boat is to optimize its weight and hydrodynamics, and replacing the screw and polishing the bottom will have a greater effect than forcing the engine.

    6. Owner reviews: pros and cons

    Analysis of reviews at Yandex. Market, Ozone and thematic forums (for example, ForumHouse) indicates that the motors kamisu They have the following strengths and weaknesses:

    Pros:

    • 💰 Price/quality ratio: For 60 000 RUB. received the engine, which is not inferior Toatsu 90,000 rubles. (review from the Yandex. Market.2026.
    • 🔧 Ease of repair: “Parts are cheaper than Japanese parts and easy to find online.”
    • ❄️ Good cold start: "At -5C, start with the first jerk, if the oil is synthetic."
    • 🛠️ Easy maintenance: “I change the oil and candles myself – it’s not difficult.”

    Cons:

    • 🔊 Increased vibration at high revs: “After an hour of work at maximum speed, the hands begin to go numb.”
    • 🛢️ Fuel consumption is higher than stated: "Instead of 3.5 l / h, 4.1 l / h is used at full load."
    • 🔧 Unstable idling: “Sometimes it becomes deaf when switching from idling to gas.”
    • 📦 Quality of assembly: “On the new model KM-9.9FHS I had to tighten the gearbox.

    78% of owners (according to the survey) ForumHouserecommend kamisu For rare use (fishing, cruising), but only 42% recommend them for heavy use (for example, for working as a taxi on the water).

    7 Where to buy and how not to run into a fake

    Motors. kamisu They are sold through official dealers, online stores and markets, and to avoid buying counterfeit or “gray” imports, note the following points:

    • 🛒 Official dealers: Check if the company is on the list kamisu.ruOfficial dealers provide a 2 year warranty.
    • 📄 Documentation.: The kit must be a product passport with a serial number, instruction in Russian and a warranty card.
    • 🔍 Appearances:
      • The body of the motor must be engraving with a serial number (starts with a KM-XXX).
      • The gearbox cover on the original models has a logo Kamisu It's like a wave.
      • Fuel tank and hoses must be marked ISO 7840 (standard for marine equipment).
    • 💳 Price.: If the engine sells 20 percent less than the market average, that's a good thing to be wary of. Kamisu KM-5BMS It can not cost less than 45 000 rubles (for 2026).

    When buying a motor from hand, be sure to check:

    

    1. The condition of the piston group (compression).
    

    2. the integrity of the gearbox (is there a backlash in the screw).
    

    3. operation of the cooling system (after starting from the control hole, a water jet should flow).
    

    4. presence of traces of repair on the cylinder block.
    ⚠️ Attention.In 2023, the number of cases of sale of “remarked” engines (for example, Chinese) has increased. Hangzhou purportedly kamisuThey can be distinguished by the quality of casting - counterfeits often show seams and irregularities on the body.

    FAQ: Frequent questions about Kamisu's engines

    ❓ Can I use the Kamisu motor on seawater?

    Yes, but after each operation in salt water, you should wash the cooling system with fresh water for 10-15 minutes. corrosion-free for the reducer (e.g., CRC Marine Grease).

    ❓ What kind of gasoline should I put in the engine of Kamisu?

    Gasoline is suitable for all models AI-92Use. AI-95 It does not offer advantages, and in some cases can lead to overheating due to a higher combustion temperature. For two-stroke engines, be sure to mix gasoline with oil in proportion to the fuel. 1:50 (for example, Motul Outboard 2T).

    ❓ Why does the Kamisu motor not develop full power?

    There may be several reasons:

    • 🔹 A clogged carburetor (you need to clean the chiclers).
    • 🔹 Worn spark plugs (replace with new, gap) 0.7-0.9 mm).
    • 🔹 Damaged screw (check the blades for chipped).
    • 🔹 The wrong move of the screw (for speed you need a greater step, for thrust - a smaller one).

    ❓ How much does it cost to maintain the engine Kamisu in the service?

    The cost of standard maintenance (replacement of oil, candles, filters) in official service centers:

    • 🔹 For two-stroke models: 2,500-3,500 RUB.
    • 🔹 For four-stroke models: 4000-5500 RUB.

    The gearbox will cost 6,000-12,000 rubles depending on the complexity, and self-maintenance reduces costs by 30-40%.

    ❓ Can I install the engine Kamisu on an inflatable boat without a transom?

    No, all the engines. kamisu They are designed for installation on transom boats, for inflatable boats without transom (e.g., Sevak or Flagship) special prairie It can be made independently from plywood with a thickness of 18-20 mm or buy ready-made (cost from 3 000 rubles).