Legendary Wind 8 For more than half a century, it has been one of the most popular outboard motors in the post-Soviet space, with its simple design, availability of parts and maintainability allowing owners to self-maintain the unit without resorting to specialized services, but for successful restoration or adjustment, you need to clearly understand the internal structure and have an up-to-date layout of the units at hand.
Knowledge of the scheme Wind 8 It allows you to quickly diagnose problems with ignition, carburetor or cooling system. Unlike modern imported analogues, this motor does not require complex electronics for diagnosis, it is solved by mechanical methods and understanding of physical processes, which is why the circuit becomes the main tool in the hands of the owner who wants to extend the life of his boat.
In this article, we'll take a look at every node in detail, from the ignition system to the lower unit, so you can confidently take on the repair. carburetor and piston-group It's going to help you avoid the typical build errors, so let's dive into the technical part.
General arrangement and working principle
Engine design Wind 8 It's based on a two-stroke two-cylinder engine, which gives it high specific power, and it takes two strokes to work: compression and stroke, and purge and release are done simultaneously. The crank-shaking mechanism Here plays a key role, converting the reciprocal movement of the pistons into the rotation of the propeller.
The engine is lubricated with a gasoline-oil mixture, which requires the owner to strictly observe the proportions when preparing the fuel. The ignition system, whether magdino-contact or electronic (in newer versions), provides spark formation on candles. magneto generating current, critical for troubleshooting startup problems.
Special attention should be paid to the cooling system, which is flowing. Water is sucked through special holes in the lower unit and washes the engine shirt, then is thrown out along with the exhaust fumes. Disturbance of fluid circulation instantly leads to overheating and jamming. piston-group.
⚠️ Warning: Never start the engine without dipping the lower unit in water or without a forced water supply, as this will lead to rapid destruction of rubber seals and overheating.
Ignition and electrical system diagram
The most common launch problems are related to the ignition system. Wind 8 The electronic versions are not mechanically connected, but require the coils and switch to be checked by a principled electrical circuit.
To properly adjust the moment of ignition, you need to know that the gap between the contacts of the interrupter should be strictly 0.4-0.5 mm. The angle of ignition advance is regulated by turning the base of the interrupter relative to the cam. lead-point incorrectly, the engine will either stall on idle, or overheat at full speed.
- 🔌 Check the status. spark plug: black colored garment indicates a rich mixture, white - about poor.
- ⚡ Call high-voltage wires for insulation breakdown, especially in wet weather.
- 🔧 Make sure that the gap between the magnetic wire and the ignition coil does not exceed 0.15-0.2 mm.
Secrets of Magdino tuning
When placing a magdino on an engine crankcase, it is critical to combine the "BMT" tag on the flywheel with the risk on the stator, and even a few degrees of error will lead to a "sneeze" in the carburetor or a shot at the muffler.
When switching to electronic ignition (contactless), the circuit is simplified, mechanical wear is removed, but there is a dependence on the quality of electronic components. Wind It works in tough conditions.
Carburetor and fuel system
The heart of the fuel system is the carburetor, which is Wind 8 The carburetor is usually represented by K-33 models or modifications thereof, and its task is to prepare a combustible mixture of the desired concentration depending on the mode of operation of the engine. The carburetor circuit includes a float chamber, a main dispensing system and an idling system.
The carburetor is adjusted by two screws: the quality and quantity of the mixture. The quality screw restricts the access of air idling, and the number screw regulates the position of the throttle. float-chamber corresponded to the data-sheet figures, otherwise there may be failures in the case of a sharp opening of gas.
☑️ Diagnosis of the carburetor
A common problem is clogging the jellywood or getting water into the fuel tank. The fuel line is simple, but it requires all the connections to be tight. If the system has air suctions, the mixture will become poor, which is dangerous for the system. piston-group overheating.
| Parameter | Value/Normality | Permissible deviation |
|---|---|---|
| Contact gap of the interrupter | 0.4 - 0.5 mm | ± 0.05 mm |
| Fuel level in the float chamber | 16 - 18 mm | ± 2 mm |
| Diameter of fuel jeeler (GDS) | 1.1 - 1.2 mm | Depends on the modification. |
| Compression in cylinders | 6.0 - 8.0 kgf/cm2 | At least 5.0 kg/cm2 |
Mechanical part: lower unit and gearbox
lower unit Wind 8 It's a tube that runs through a propeller shaft, a gear bar and a cooling tube. gearboxIt's a circuit of a reversible mechanism, usually cam type, which is reliable but requires regular lubrication.
The most important element is the propeller, and its geometry directly affects the speed and thrust of the boat, and damage to the propeller blades leads to vibrations that destroy the boat. bearing The screw installation scheme involves the use of a splint, which prevents the screw from unscrewing spontaneously.
Lubricate the gearbox only with special water-resistant lubricants (such as Litol-24 or specialized transmission oils), as ordinary solidol is quickly washed out by water.
Regularly check the condition of the coils of the propeller shaft. When they wear, the water enters the gearbox, mixing with the lubricant and forming an emulsion (mayonnaise). slip-bearing.
⚠️ Note: If after changing the oil in the gearbox it has a milky shade, immediately replace the oedeals, even if there are no obvious water stains.
Typical malfunctions and methods of their elimination
Operation Wind 8 In real life, you often have a number of typical problems: the engine may not start, stop on the go or develop full speed. The circuit for finding a fault always goes from simple to complex: first check the spark and fuel, then the compression and mechanics.
If the engine is Troit, you need to take the caps off the candles in turn, and if the engine doesn't change when you remove one of the caps, it doesn't work. spark-plug, coil or suck air through the gasket.
- 🔥 The engine overheats: Check the control hole for launching, it may be clogged with grass or sand.
- 🔊 Engine knock: indicates a large gap in the engine piston-group Or the destruction of the crankshaft bearings.
- 💨 Smoke exhaust: indicates the over-enrichment of the mixture or the burning of oil due to wear of the rings.
Often, owners have difficulty running hot, which may be due to improper adjustment. carburetor Or ignition too early, and in these cases, the short-term opening of the throttle valve at launch helps.
90% of problems with the start of Winds 8 are solved by cleaning the carburetor, replacing candles and checking the gap of the contacts of the interrupter.
Maintenance and conservation
Durability of the motor Wind 8 Regular lubrication of rubbing parts, replacement of fuel filters and checking of tightening of mount bolts prevent serious breakdowns, the maintenance scheme must be performed after each season or every 50 motor hours.
In preparation for winter storage, you need to drain the residues of fuel from the carburetor and tank, since modern gasoline is prone to stratification and the formation of resins. carburetor It is better to conserve, starting the engine on pure gasoline until its full production.
Lubricate all the hinges and cables, check the condition of the lower unit for corrosion. If the motor is stored in the assembly with the boat, it is better to remove the lower unit and store it in an upright position in a dry room.
Storage
The ideal place to store the engine is a heated garage. If this is not possible, cover the engine with a dense cloth or cover, but provide ventilation to avoid condensation inside the silencer and cylinders.
FAQ: Frequently asked questions
Which oil is best used for wind 8?
For two-stroke engines, it is recommended to use special oils for water cooling marked TC-W3. The ratio of mixing with gasoline is usually 1:25 (40 ml per 1 liter) for running and 1:33-1:40 for further operation, depending on the load.
Why does the engine stop when the gas is opened?
It's probably a clogged carburetor's main metering system or a broken fuel tank ventilation. fuel-filter and the integrity of the fuel hoses for cracks causing air suction.
Can I install an electronic ignition on Wind 8?
Yes, there are many contactless electronic ignition (CI) kits designed specifically for motors. WindThis simplifies start-up, improves stability and eliminates the need to adjust the contact gap.
What is the maximum speed of the boat with the Wind 8 engine?
The speed depends on the type of boat, its loading and propeller. For a lightweight inflatable boat with one person, the speed can reach 25-30 km / h. For a heavy PVC boat with two passengers, the speed will be about 15-20 km / h.