The legendary Soviet and Russian Wind 8 It is one of the most common outboard motors in the country's waters, and its design, despite its age, still attracts interest from water engines, especially those who value simplicity and maintainability. engineUnderstanding this parameter is necessary for the correct selection of spare parts, setting up the carburetor and assessing the technical condition of the unit.
Many owners confuse the concept of full-length with cylinder displacement, which leads to errors in the search for information. In this article, we will discuss in detail how much engine capacity is. Wind 8How it affects power and why these numbers may vary slightly depending on the year of production. fuel-mix What to do if the engine loses its former speed.
Knowing the exact specifications is the first step to proper maintenance, and if you're planning a major overhaul or just want to understand your iron horse better, you need to understand the geometry of the cylinder-piston group, and we'll look at not only the dry numbers, but also the practical aspects of operating the engine with its design features.
Design features and geometry of cylinders
Engine. Wind 8 It's a two-stroke design with two cylinders in a row, and it's the number of cylinders and their diameter that determines the final cast, and the design of the cylinder block is made of aluminum alloy, which allows for efficient heat removal, but also imposes limits on repair tolerances. Workload It consists of the sum of the volumes of both cylinders in which the fuel-air mixture is burned.
The diameter of the cylinder and the stroke of the piston are the basic values that engineers set in the design phase. Wind 8 These parameters are tailored to provide maximum thrust at low and medium speeds, which is critical for heavy inflatable boats or metal "kazaks", and the wear of the piston group directly affects compression and, as a result, the real power return.
⚠️ Attention: When the cylinders are squandered for the repair size of the piston, it is impossible to exceed the permissible values of wall thinning, otherwise the cylinder block can burst under the influence of thermal loads.
It is important to remember that a two-stroke cycle implies that a part of the volume is used for blowing and releasing gases. Therefore, the effective volume involved in creating useful work is always less than the geometrical one. However, technical passports specify the full working volume calculated from the geometry of the piston from the bottom dead point to the top.
When assembling the engine, always check the marks on the crankshaft - their displacement even by one tooth will lead to incorrect gas distribution phases and loss of power.
Exact technical specifications of volume and capacity
Official data of the manufacturer state that the engine displacement Wind 8 form 220 cubic centimeters (cm3)This figure is the standard for the entire series of eight-horsepower engines produced in different years. Wind 8M or later versions with electronic ignition), the rated power can vary slightly, remaining within the passport 8 horsepower.
The compression ratio in cylinders is another important dimension related to volume. For this motor, it is usually about 6.0-6.5 units. This means that the mixture is compressed 6-6.5 times before ignition. The leakage of the combustion chamber (ring wear, cylinder jack) reduces the effective compression ratio, and the motor stops developing the declared power even if the volume formally remains the same.
Below is a table with the main technical parameters related to engine volume and performance:
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Workload | 220 | cm3 (cc. cm) |
| Number of cylinders | 2 | Shh. |
| Diameter of the cylinder | 52 | mm |
| Piston stroke | 52 | mm |
| Nominal power | 8 | hp |
As you can see from the table, the engine has a square dimension (diameter equal to the stroke of the piston), which is a classic solution for balancing torque and rotation, which allows the engine to be sufficiently elastic when starting from a standstill and stable at cruising speeds.
The impact of volume on fuel consumption and mixture
Engine size dictates the appetite of the engine. Wind 8 With a volume of 220 cm3, the average fuel consumption is about 2.5-3.0 liters per hour at full gas. However, it is important to understand that the actual flow rate depends not only on the liter, but also on the quality of the fuel mixture preparation. The oil should be a strictly defined proportion, usually 1:25 or 1:50 depending on the type of oil and recommendations for the particular series.
If the carburetor is not set up correctly and delivers too rich a mixture, some of the fuel simply does not burn and is thrown into the exhaust, polluting the water and forming soda on candles. Poor mixture, on the contrary, can lead to overheating and bullying, since the oil in the mixture also performs a lubricating function. Cylinder volume determines how much of this mixture can enter in one stroke, so the adjustment of the carburetor chicklers should be made taking into account factory specifications.
- 🛢️ Proportion of mixture: Follow the instructions for your oil strictly, for mineral oils, 1:25 is more often used.
- 🔥 Gasoline quality: Use AI-92 or AI-95 gasoline without alcohol content to avoid stratification of the mixture.
- 🧹 Cleanliness: Before mixing, let the gasoline settle to remove water and heavy fractions.
The engine's economy also depends on the state of the exhaust system, so if the muffler is filled with soot, the cylinders are incompletely blown out, and the effective fresh charge volume decreases, which causes the owner to open the throttle more strongly to maintain speed, which leads to overruns.
Typical problems with compression and piston
Over time, even reliable Wind The main reason is the wear of the piston rings and the development of the cylinder mirror. The owner may notice that the boat has become worse at planing or the engine stalls when the throttle is opened abruptly. The compression test is the first step in diagnosis. The normal value is a pressure between 7 and 9 atmospheres.
If the bullies are deep, simply replacing the rings won't help, you'll need to tear the cylinders under the repair piston, in which case the engine capacity will increase slightly, but this change is negligible for the overall dynamics of the boat, the main thing is to restore the tightness and the necessary degree of compression.
Can the wind increase the volume?
Theoretically, having wasted cylinders for the maximum repair size, you can get a small increase in volume (up to 5-7%), but this will require reconfiguration of the carburetor and the selection of pistons, which is economically unfeasible for the old engine.
A common problem is also the break-up of the partition between the windows in the cylinder or damage to the crankshaft coils, and when the coils are damaged, the motor starts sucking air, which impoverishes the mixture in one of the cylinders, which leads to uneven operation and overheating. Tightness of the crankcase For two-strokes, the condition of the cylinders is just as important.
Comparison with modern analogues
Compared to modern Chinese or Japanese analogues with a capacity of 8-9.8 hp, the good old Wind Modern engines often have a larger displacement (about 200-250 cm3 per cylinder for 2-cylinder 10-horsepower), but thanks to the perfect purge and exhaust system, they produce more power per liter of volume. Wind In the Russian hinterland, there is still no competition.
Modern engines require better fuel and oil, while Wind 8 It's known for being omnivorous, and it can run on a mixture of imperfect quality, even though it reduces its lifespan. For a fisherman who goes out to the water a couple of times a season, reliability and simplicity of construction are often more important than passport power and sustainability.
- ⚖️ Weight: Wind is heavier than modern analogues of the same power.
- 🔧 Repair: Parts are affordable and cheap, the design is clear to any mechanic.
- ⛽ Fuel: less demanding on the octane number and quality of the oil.
Choosing between reviving the old Wind If you're looking for a new engine, you need to consider not only the size of the engine, but also the operating conditions. If you need a workhorse to transport goods or fish in remote areas where there are no services, then the specifications of the vehicle are: Wind They may be more suitable than the high-tech, but capricious Japanese.
☑️ Diagnosis before the season
Tips for maintenance and extension of the resource
For a 220 cm3 engine to last for years, there are some simple but important rules to follow, first of all, it's break-in after any repair. Even if you just replaced the rings or the glands, you need to run the engine in gentle modes so that the parts are worn out, and ignoring this stage is the most common reason for quick failure after repair.
Regular lubrication of friction nodes is also critical. Wind 8 There are points that require attention: a needle bearing crankshaft, gearshift mechanism and gearbox. Reductor oil You need to change each season, checking it for the presence of an emulsion (a sign of water entering through the glands).
⚠️ Attention: Never leave the motor in water for long without extreme necessity – this accelerates the corrosion of aluminum parts and the fouling of lower unit with algae, which worsens cooling.
Motor storage also plays a role: In the winter, be sure to drain water from the cooling system (unless it leaks itself in vertical storage) and can the cylinders by spraying some oil inside and turning the crankshaft, which will protect the cylinder mirror from corrosion during downtime.
Regular replacement of fuel filters and use of fresh fuel mixture is the key to stable operation of the carburetor and the absence of power failures.
Frequently Asked Questions (FAQ)
Can I put pistons from Winds 12 on Winds 8?
No, that's impossible. Wind 8 and Wind 12 The different geometry of the cylinders, the stroke of the piston and the size of the purge windows, the installation of the wrong pistons will cause the gas distribution to be disrupted and the engine to collapse rapidly.
Which gasoline is best used for a volume of 220 cubic meters?
The best choice is the AI-92 gasoline, and the AI-95 is acceptable, but it doesn't have a significant advantage for an engine with this compression ratio, and the main thing is that the fuel is fresh and water-free.
Why does the wind heat up with a full cylinder?
Overheating is most often caused not by volume, but by a violation of the circulation of cooling water (clogged water intake, faulty impeller pump) or the wrong angle of ignition ahead, and also by working on a poor mixture.
How often should you change the oil in the gearbox?
The oil in the gearbox is recommended to be changed at least once a year, preferably before the engine is put into winter storage or at the beginning of navigation, this will allow you to notice the ingress of water inside the gearbox in time.
Is it possible to increase the power of Wind 8?
Theoretically, you can change the timing, put in a different carburetor and change the exhaust system, but the life of such a motor will drop sharply, and reliability will become unpredictable, it is easier and cheaper to buy a more powerful engine.