Soviet boat-engine Wind 8e Deservedly considered a legend of domestic water-motor sport and amateur fishing, this model, produced for more than 40 years at the Barnaul Motor Plant, became a workhorse for thousands of owners of inflatable boats and small boats. Winds. It is not fading, but only growing, especially among those who value repairability and availability of spare parts.
The number "8" in the name indicates a rated power of 8 horsepower, which is the optimal indicator for planing light PVC boats up to 3.5 meters long. The letter "e" in the model index indicates the presence of electronic ignition, which was a significant step forward compared to the magdino-contact systems of previous generations. presence of thyristor ignition system MBE-1 This modification is the most popular in the secondary market today.
In this article, we will take a closer look at the engine’s technical features, the typical vibration and carburetor problems, and the possibilities of modern tuning. Understanding the working principles of this two-stroke unit will allow you to squeeze the maximum performance out of it and extend the life of the car for long seasons.
Technical specifications and design features
Construction Wind 8e It's based on a time-tested two-cylinder, crank-chamber purging two-stroke circuit, which has a displacement of 174 cubic centimeters and can reach up to 5,000 revolutions per minute, and an important feature is the vertical arrangement of the cylinders, which allows the power unit to be compactly placed in the lower unit pipe.
Cooling system forced, off-shore water is supplied through a rubber pump installed on the lower unit. Electronic ignition It's powered by a magdino that generates a candle current, which eliminates the need for an external battery to spark, although the ignition coil and thyristor unit require reliable moisture insulation. The engine weight in running order is about 26 kilograms, making it transportable even for one person.
The gearbox is made of aluminum alloy, and it has a pair of conical gears that allow propeller rotation to be transmitted. The gearbox has a gear ratio of 1:2, which is a compromise between thrust and speed. The tiller is used to control gas and shift gears, although it is possible to install remote control via cables.
- 🚀 Power: 8 hp at 4500-5000 rpm.
- ⚖️ Weight: 26 kg (no fuel or oil)
- ⛽ Fuel consumption: up to 3.5 l/h at full gas.
- 🔧 Type of mixture: AI-92/95 gasoline + oil for two-stroke engines (proportion 1:25 for running, 1:33-1:50 for operation).
⚠️ Attention: Never run the engine dry without first pumping the cooling system. The pump without water, even for 30-40 seconds, is guaranteed to lead to the destruction of the glands and bullies in the pump.
Vibration problems and methods of their elimination
One of the most famous "diseases" of the model Wind 8e This is a phenomenon often called "shiver," and it can significantly reduce the comfort of steering a boat, and the main reason is the imbalance of the crankshaft and the shaft-piston group, as well as the resonant frequencies of the long lower unit pipe.
To reduce vibration, many owners resort to installing additional counterweights on the flywheel or using damper pads between the engine and the transom of the boat, and it is also worth checking the condition of the needle bearings of the lower head of the rod - their destruction often leads to pistons beating and increased shaking.
It is important to adjust the carburetor correctly, since working on a too poor mixture also causes detonation, which increases the vibration loads on the cylinder block. Adjustment of the gaps between the piston and the cylinder (skirt) must be made with an accuracy of one hundredth of a millimeter.
☑️ Diagnostics of vibration
There is a load-bearing technique that allows the parts to fall into place, but if the vibrations come on suddenly after repair, the balance is likely to have been upset when the crankshaft is assembled, and in such cases, the assembly needs to be reassembled and balanced.
Configuring and modernization of the K-33 carburetor
Staff carburetor K-33, which is fixed on Wind 8eThe problem is that the factory settings often do not correspond to real-world conditions, especially when using modern gasoline and oils, the main problem is floating idle turns and dips when a throttle is opened abruptly.
To work consistently, you need to adjust the fuel level in the float chamber. The optimal level is considered to be at which the fuel is 1-1.5 mm below the edge of the overflow channel. The quality of the mixture is adjusted idling by a screw located at the bottom of the carburetor, and the amount is a throttle.
The procedure for adjusting the K-33 carburetor:1. Warm up the engine to operating temperature (2-3 minutes).
2. Wrap the screw of the quality of the mixture to the point (not much!).
3. Turn the screw 1.5 - 2 revolutions (basic setting).
4. Set minimum steady speeds with a screw of quantity.
5. Smoothly wrap the quality screw until the turnovers start to fall, then turn a little away for maximum revs.
6. Adjust the number of screws to the desired idle turns.
Many motorists recommend replacing the regular jikler with an analogue with a slightly smaller hole, since the factory often pours excess fuel.
- 🔩 Float: It should be light and not have a hole (often changed to foam).
- 💨 Diffuser: The condition of the sprayer is critical for mixing.
- 🛑 Needle: Check the shut-off needle for wear of the cone.
To improve the engine acceptability, try adding a washer under the spring of the carburetor throttle, this will slightly change the characteristic of opening the valve.
Ignition system: IBE-1 and alternatives
Electronic ignition system MBE-1 It was a revolution for its time, saving owners from constantly changing contacts and interruptors, but it's not without its drawbacks, but the main weakness is the thyristor and high-voltage transformer, which can fail when moisture is injected or voltage surges.
The gap between the flywheel’s magnetic conductor and the ignition coils (sensors) should be strictly 0.3-0.4 mm. Too much gap will lead to a weak spark and problems with starting, too small to mechanical damage to the coils by the flywheel.
⚠️ Attention: When you put a flywheel on the crankshaft, don't hit it with a hammer directly! It can split the magnets inside the flywheel. Use a special mandrel or screw the crankshaft nut to plant a cone.
A modern alternative to a regular system is the installation of microprocessor ignition units (for example, Micon or analogues), which allow you to adjust the angle of ignition ahead of time more accurately, which gives you power gains and lower fuel consumption, but requires intervention in the regular electricity and the availability of soldering skills.
Reductor and propeller
gearbox Wind 8e It's very simple, but it needs regular maintenance, and it has a pair of conical gears inside it that transmit torque at 90 degrees, and the main problem is that water gets into the gearbox through the coils, which leads to oil emulsification and corrosion of the gears.
You need to change the oil in the gearbox every season or every 50 motor hours. To check the tightness, you can lower the gearbox into a container of water and feed it inside (or just heat the case) by watching the bubbles. Standard oil is Tap-15B or special transmission oils for outboard motors.
| Parameter | Meaning / Description | Recommendation |
|---|---|---|
| Type of gearbox | Single-stage, conical | Monitoring noise levels |
| Transfer ratio | 1: 2.0 | Optimal for traction |
| Oil | Tap-15B, SAE 90 | Change once a season |
| Spinning screw | 2 bladed, Ø 216 mm | Step 210 mm (standard) |
| Luftwall | Allow for up to 0.5 mm. | Replacement of bearings when knocking |
The propeller with a diameter of 216 mm and a pitch of 210 mm is selected in such a way as to provide good emphasis on heavy boats. However, for light inflatable boats, it is often recommended to use propellers with increased pitch (up to 230-240 mm), which allows for higher speed, but can lead to engine overload if the boat is heavy.
The secret to a quiet move
Many wind turbine owners note that installing a rubber line between the lower unit and the suspension bracket reduces the transmission of vibration to the transom, and grease the propeller splints with graphite lubrication also helps, which prevents the screw from "pripping" to the shaft.
Tuning and improvement to increase power
Owners who want to squeeze out Wind 8e. These are additional horses, often using pistons to squander cylinders from more powerful models or installing exhaust through a lower unit (muffler), which reduces the resistance to gas release. Standard exhaust through water in a lower unit pipe creates backpressure that strangles the engine at high revs.
The exhaust system is the most efficient way to increase power, by milling additional channels or installing an external muffler in lower unit, which not only adds 10 to 15 percent of the power, but also significantly reduces engine noise, making fishing more comfortable.
Also popular is the installation of a more productive carburetor, for example, from mopeds in the series. Delta Or Mikuni's specialized boat carburetors, which require a transition flange and fine tuning, but the result is worth it -- the motor becomes more responsive.
- 🛠️ Polishing: polishing of intake and exhaust channels improves gas exchange.
- ⚙️ Spurs: installation of anti-cavitation plate (spurs) on the gearbox improves the focus of the screw.
- 🔥 Candles: Using NGK or Denso candles instead of regular A11-3s improves spark stability.
Competent tuning of the exhaust system and replacement of the carburetor can turn the Wind 8e into a full-fledged 10-horsepower engine, but require high qualification of the performer.
Frequently Asked Questions (FAQ)
Which gasoline is better to use for winds 8e: AI-92 or AI-95?
The manufacturer recommended the AI-93, which is not currently produced. AI-95The AI-92 is acceptable, but it can run a little less stable at high speeds and is prone to overheating, the main thing is a quality oil for the mixture.
Why does the 8e wind stop at high speeds?
The most likely causes: "poor" mixture (suction of air through the gaskets of the carburetor), clogging of the fuel filter or disruption of the ignition system (breaking of the high voltage on the mass when heating).
Can Wind 8e be used on seawater?
You can use it, but with caution. Aluminum alloys of the engine are susceptible to corrosion in salt water. After each outing, the engine must be thoroughly washed with fresh water and the external components lubricated. Internal corrosion of the pump is faster.
Where can I find spare parts on Wind 8e today?
Thanks to the huge circulation, spare parts (pistons, rings, oils, gaskets) are produced by many private companies and are available in boating stores and marketplaces. With a shortage, only original gearbox housings or lower units in perfect condition can be found.