Four-stroke outboard motor Yamaha F90 With a balance between performance, efficiency and reliability, the model has won the trust of both professional fishermen and outdoor enthusiasts. The motor is equipped with innovative technologies that make it not only powerful but also surprisingly quiet in operation - an important factor for those who value comfort on the water.
In this article, we will discuss specification Yamaha F90We will compare it with competitors, talk about the nuances of operation and maintenance, and give real feedback from owners, and pay special attention to compatibility with various types of boats and optimal operating modes - this will help to avoid errors in the selection and prolong the life of the engine.
Technical specifications of the Yamaha F90 four-stroke
Motor. Yamaha F90 series FIt's a sci-fi system that's famous for its reliability and fuel efficiency, and here are the key parameters that determine its capabilities:
- 🔧 Workload: 1596 cm3 (4 cylinders)
- ⚡ Maximum power: 90 hp at 5,500 rpm
- ⛽ Fuel type: AI-92 gasoline (recommended)
- 🔄 Launch system: Electric starter + manual starter (optional)
- 📏 Weight: 152 kg (depending on the modification)
- 🔊 Noise level: up to 93 dB (at maximum speed)
One of the key features of the model is the system PrimeStart™It's a technology that allows you to start easily even in cold weather. Multi-Point Electronic Fuel Injection (EFI) It not only improves dynamics, but also reduces fuel consumption by 20-30% compared to carburetor analogues.
If you plan to use the motor in salt water, be sure to rinse the cooling system with fresh water after each operation – this will prevent corrosion of aluminum parts.
| Parameter | Meaning | Note |
|---|---|---|
| Type of transmission | Hydraulic control | Smooth gear shifting |
| Maximum inclination angle | 70° | For shallow water and moorings |
| Recommended screw | 3 blade, 13-19 inches pitch | Depends on the type of boat. |
| Producer's guarantee | 3 years | Provided that the service is provided |
Advantages and disadvantages of the model
Like any other technical product, Yamaha F90 It has its strengths and weaknesses, and let's go through them in detail so you can make an informed decision about your purchase.
Pros:
- ✅ Economics: fuel consumption ~20 l / h at cruising speed (with the correct setting of the propeller)
- ✅ Reliability: resource before major repairs - 3000+ motor hours
- ✅ Quiet work: Special muffler system reduces vibration
- ✅ Universality: Suitable for boats 4-6 meters long
Cons:
- ❌ Price: above the market average (from 850 000 rubles in 2026)
- ❌ Weight: It is more difficult than some competitors (for example, Honda BF90 weighs 148 kg
- ❌ Difficulty of self-repair: Requires specialized diagnostic equipment
⚠️ Attention: When buying a used motor Yamaha F90 The lack of oil change records every 100 hours may indicate a hidden problem with the piston group.
Comparison with competitors: Yamaha vs Honda vs Mercury
To understand how Yamaha F90 It differs from its analogues, we will conduct a comparative analysis with two main competitors in this segment: Honda BF90 and Mercury F90.
Honda BF90 It is known for its simplicity of design and light weight, but it is less successful in terms of electronic systems. Mercury F90It offers excellent dynamics, but has a higher fuel consumption. The Yamaha F90 combines electronic fuel injection, low vibration and an official 3-year warranty on all components, including electronics.
| Parameter | Yamaha F90 | Honda BF90 | Mercury F90 |
|---|---|---|---|
| Type of power supply | EFI (injection) | EFI (injection) | EFI (injection) |
| Weight, kg | 152 | 148 | 158 |
| Guarantee, years. | 3 | 2 | 3 |
| Features | PrimeStar, low noise | Simple construction | High dynamics |
If it matters durability of electronic componentsthen Yamaha It's the best choice for those who appreciate it. ease and ease of servicefit HondaWell, if you have to. low-speed - Pay attention to this. Mercury.
Boat Compatibility: Which Models Are Suitable?
Motor. Yamaha F90 It is ideal for boats from 4 to 6 meters long, but it is important to consider not only the length, but also the length of the boat. shipwreck, case-stuff and intended mode of operation.
For PVC (for example, Bark 540 or Frigate 520) this engine will provide excellent speeds of up to 50-55 km/h with the right screw selection. aluminum-boat (like) Crimea 5M or Kazan 530) 90 hp is sufficient to tow a water skier or carry a load of up to 500 kg.
- 🛥️ PVC boats: recommended weight up to 600 kg
- 🚤 Aluminum boats: up to 700 kg (including passengers)
- ⛵ Boats: Only for small sized (up to 5.5 m)
⚠️ Attention: When installing the motor on a boat with a transom in height of more than 508 mm (20 inches), an elongated leg will be required (see below).Yamaha 25" XLUsing a standard leg on a high transom will result in cavitation and loss of power.
Make sure that the weight of the boat does not exceed 70% of the maximum load capacity of the engine |
Check the height of the transom (should correspond to the length of the motor leg)|
Evaluate the balance of the boat with the engine installed (the nose should not rise more than 5°)
Clarify the recommended screw pitch for your boat model-->
Maintenance and typical faults
Regular maintenance - the guarantee of long service Yamaha F90The manufacturer recommends that the maintenance be performed every 100 hours or once a year (whichever comes first).
- 🛢️ Oil replacement (recommended): Yamalube four-stroke 10W-30)
- 🔧 Checking and cleaning of spark plugs
- 🔄 Replacement of fuel and oil filters
- 💧 Flushing of the cooling system
Among the typical faults owners note:
- Electronics problems (most often - a sensor of the position of the throttle valve)
- Overheating water-intake
- Unstable turnovers lesions
Most of these problems can be prevented by timely service. water-cleaning after operation in polluted waters prevents overheating, and the use of quality fuel keeps the nozzles in working condition.
What to do if the engine does not start?
If Yamaha F90 It's not starting, check it out.
1. Fuel availability and quality (petrol must not be older than 3 months)
Condition of safety locks (the main unit is under the hood)
Battery charge (voltage must be at least 12.4V)
Condition of candles (gap should be 0.9-1.1 mm)
If the problem is not solved, computer diagnostics is required in the service center.
Reviews of owners: real experience of operation
Analysis of feedback on forums (FishHunting, BoatMag) and on social media shows that most owners Yamaha F90 The average score is 4.7 out of 5, and these are the things that are most often mentioned:
Positive feedback:
- 👍" For 5 years of operation, no serious breakdowns - only regular maintenance
- 👍" Very quiet compared to two-stroke engines - you can talk on the go
- 👍" Fuel consumption of 18 l/h at a speed of 40 km/h on a boat 5.2 m"
Negative reviews:
- 👎" Expensive repair of electronics - the replacement of the sensor cost 25 000 RUB.
- 👎" Heavy to carry by hand - it is better to have a winch
Interestingly, many owners have noted performance After running (first 10 hours), the engine becomes more responsive and fuel consumption decreases by 10-15%.
More than 80% of owners recommend installing a 15-17-inch screw on the Yamaha F90 for optimal speed and economy.
Prices and where to buy: new vs b / y models
Cost of new Yamaha F90 in 2026 varies from 850,000 to 950,000 rubles The basic version includes an electric starter, hydraulic control and a standard leg (20 inches), additional options (elongated leg, remote control) can increase the price by 50 000-80 000 rubles.
In the secondary market, prices start from 450,000 rubles. For the 2018-2019 models, which are up to 300 hours in range, it is important to be careful.
- 🔍 Check the motor clock (up to 50 hours per year)
- 📄 Demand a service book with notes about the
- 🛠️ Check the condition of the reducer (does there be any oil leaks)
The best places to buy:
- 🏪 Official Yamaha dealers (warranty, original parts)
- 🌐 Avito, Drom (b/u, but at risk of running into a "drowned man")
- 🛒 Specialized shops (e.g., BoatMarket, MotorLodka)
⚠️ Attention: When buying a used motor, be sure to check it on the GIMS database for theft. The serial number must match the documents and be not interrupted.
Frequently Asked Questions About Yamaha F90
Which propeller is better to put on the Yamaha F90 for a boat 5.5 m?
For a boat with a length of 5.5 m, the optimal will be a 3 bladed propeller with a pitch of 15-17 inches. For heavy aluminum boats, you can consider a 4 bladed propeller with a pitch of 14 inches - it will give better emphasis on low revs, but the maximum speed will decrease by 5-10%.
Can I use 92 petrol instead of 95?
The manufacturer recommends the AI-92, and that's the best option. Using 95th gasoline will not give you an increase in power, but can lead to increased flap swelling due to additives.
How often should you change the oil in the gearbox?
Oil in the gearbox Yamaha F90 Change every 100 hours or once a year, and use only specialized transmission oil. Yamalube Gear Oil (SAE 80W-90) Refuelling capacity 250 ml.
How much does a motor weigh with a fuel tank?
The engine itself weighs 152 kg. A standard fuel tank of 25 liters weighs ~15 kg (empty), so the total weight of the system will be about 167 kg plus the weight of mounts and cables (~5 kg).
Can I diagnose the engine myself?
Basic diagnostics (checking candles, filters, oil levels) can be done independently, but the ECU will need a specialized scanner to read the errors. Yamaha YDS Without it, you can't see the electronic malfunction codes.