The choice of a reliable fishing boat or family trip often faces residents of regions with a developed river network, among the many options made of PVC and composite materials, which are used in the water. metal boat The boat has been a popular model in this segment for many years, and has been one of the most popular models in this segment. Oka 4The sculpted sculpted at the St. Petersburg Nevsky plant, why is this model so interesting to water-engineers, and is it worth it to become your first vessel?
In this article we will discuss in detail specificationThe design features and the real-world performance of this model, which will provide you with the nuances of assembly, upgrades and how to properly prepare the boat for the season, will be useful for beginners who are planning a purchase, and for experienced owners who want to learn more about their vessel.
We will not use complex engineering terms without explanation, but will focus on the practical side of the issue. Oka 4 It is a classic of Russian shipbuilding, which has been tested by the time and harsh conditions of Russian water bodies.
General concept and history of the model
History of the boat Oka 4 The company's origins date back to the late 90s, when the market needed an affordable and reliable vessel, and the Nevsky engineers set out to create a versatile boat that combined stability, capacity and outboard power, and the result was a model that quickly gained popularity thanks to its high-performance design. aluminum-magnesium alloy AMG5M.
The idea behind the project was to create a “people’s boat” that was simplified to facilitate production and repair, but without losing critical safety features. The Oka 4 boat is made of 2 mm thick sheet aluminum by weldingIt's much stronger than many of its competitors in composite materials, and it's rotting, it's not afraid of UV light, and it's easily repaired in the field.
The boat's appearance is also ergonomically designed, with its rounded sides and the shape of its bow providing a good germination pattern, and despite its apparent simplicity, the engineers have managed to achieve a great balance between the two. load-carrying capacity This allows you to use the boat not only for fishing, but also for household needs in the country or in the camping.
Overall dimensions and weight parameters
One of the key factors when choosing a boat is its size. Oka 4 It is a small rowing boat and motor boat, with a length of exactly 4,000 mm, which is the best indicator for transportation by passenger car, with a maximum width of 1500 mm, which provides sufficient stability on the water, but allows you to easily pass narrow sections of rivers.
The weight of the structure is a separate topic to discuss: the dry weight of the boat is about 100 kg (depending on the configuration and year of production), which is quite a lot for one person, so it is often required to transport and launch the boat. trailer But this mass has a direct impact on resilience and safety on the wave.
The 500 mm height of the boat makes it comfortable to feel comfortable even in the presence of a small wind. For comparison, many inflatable boats of similar length have a smaller side, which creates a risk of flooding with water. Okay 4 This indicator is designed with a margin, which is confirmed by many years of use.
Below is a table with the main dimensions for clarity:
| Parameter | Meaning | Note |
|---|---|---|
| Full length | 4,000 mm | Including forespeak |
| maximum width | 1500 mm | In cheekbones |
| Height of board | 500 mm | Midle |
| Hull mass | 100 kg | No equipment. |
| Load capacity | 400 kg | Including the crew. |
Structural features of the body
The boat's body is flat-bottomed and slightly rounded, and it's a very nice geometry. stability On stagnant water, which is critical for fishing, the fisherman can stand up to cast or change his clothes without fear of a sharp roll, but on a large wave, the flat bottom can give a noticeable shaking, so the model is more suitable for lakes and calm rivers.
An important element of the design is the presence of boulder They have a dual function: they increase the hull's torsional rigidity and provide additional protection when mooring. The boulders also visually make the boat more massive and stable. The bow has a sealed forespeak box that stores things and increases unsinkability.
The slab is reinforced and designed to fit a motor up to 10-12 hp (though many put 15 hp with caution). The motor mounting is standard, suitable for most common models. It is important to note that the transom has no tilt, so adjusting washers may be required when installing the motor to achieve the optimal angle of the differentiation.
Features of welds
Welds on Oka 4 boats are argono-arc welding, which ensures high tightness and strength of the joint, but over time, oxides may appear on the seams, which are recommended to be cleaned and treated with special compositions to prevent corrosion.
Capacity and load capacity
The passenger capacity of the model is 400 kg, which means that the boat can safely carry the weight of the crew, equipment, fuel and the engine itself. In practice, this allows you to accommodate 3-4 people of average size, although the most comfortable two. Weight distribution plays a key role: shifting the cargo to the sides or nose can significantly change the performance of the boat.
The interior space is rationally organized: the two main seats (banks) are made of plywood or metal and are fixed on the sides, between them there is free space for the legs or the installation of fishing boxes, and if necessary, the banks can be dismantled or moved, making room for large cargo, such as catch or tourist equipment.
⚠️ Attention: Exceeding the maximum load capacity of 400 kg is strictly prohibited. Aluminum hull has a margin of safety, but when overloading the boat loses stability, the height of the board above the water decreases, which creates a real threat of tipping over or flooding with water even at a small wave.
The storage compartment is not completely sealed (depending on the modification of the hatch cover), so it is better to pack valuables in waterproof bags, the volume of this compartment allows you to accommodate several bags with food or spare parts for the engine.
Performance and driving specifications
On the water. Oka 4 It's a low-power engine (2-5 hp) that moves in displacement mode, creating a minimal wave. It's ideal for quiet fishing, when you need to go silently to the fishing point. With an 8-10 hp engine, the boat can go plane, but only with one person on board and minimal cargo.
The boat's handling is medium. The flat bottom does not allow for sharp turns at high speed, which can lead to a strong roll and even rollover. The steering is carried out with the tiller of the engine, there are no additional steering systems in the basic configuration. Many owners install the keel on the bottom to improve the course stability, although this is not mandatory.
The sound of the water splashing, the waves hitting the side and the engine is very well heard. This may be a drawback for the quiet lovers, but for spinning or trolling, the main advantage is the ability to pass overgrown shallow waters and touch the bottom without fear of damaging the hull, as would happen with PVC.
☑️ Pre-season checks
Modernization and tuning
Owners Okey 4 They don't often stop at the factory, and the most popular type of tuning is the installation. console It's a permanent steering wheel, a dashboard, and a more comfortable drive, especially in cold weather, and can be made from homemade plywood and fiberglass, or from a general-purpose purchase.
Another common upgrade is the installation of inflatable tubes on the sides, which significantly improve safety, increase stability and protect the sides from impacts on the pier or stones, and inflatable tubes add buoyancy, which is important under extreme loads. Some craftsmen install electric motors on the nose to quietly move through areas that are prohibited for gasoline engines.
And don't forget the painting. Factory aluminum becomes tarnished and oxidized over time. Plural enamel paint not only improves the appearance, but also protects the metal. Often the bottom is painted in dark colors for disguise, and the sides in bright colors for visibility on the water.
When installing an electric motor on the nose of the boat Oka 4, be sure to strengthen the nose with an additional platform of moisture-resistant plywood or aluminum, since the regular forespeak may not withstand the dynamic load from the engine.
Care, storage and repair
Aluminum is a very unpretentious metal, but it also requires attention. Okey 4 Two: electrochemical corrosion (when in contact with other metals in the water) and mechanical damage. After each foray, it is advisable to rinse the boat with fresh water, especially if you have been swimming in salt water bodies or rivers with industrial wastewater.
Keeping the boat upside down under a canopy or in a garage is best. Direct sunlight is not a threat to metal, but it destroys the wooden elements (banks) and burns out the paint. If the boat is outdoors, make sure to cover it with an awning so that the snow and leaves do not get stuffed inside, which in the spring will turn into water and can damage the structure when it freezes.
Repairing holes or cracks is usually done by argon welding. This requires special equipment and skills, so for serious repairs it is better to go to the workshop. Small scratches can be polished or painted. It is important (regularly check) the condition of the welds, especially in the area of the transom and mounting of the cans, as this is where the greatest vibration loads occur.
The main advantage of the Oka 4 boat is its indestructibility and maintainability, and even if it breaks, it can be brewed in the nearest garage, which is not possible with PVC or fiberglass in the field.
Comparison with competitors and conclusions
In the metal boat market, Okey 4 There are competitors, such as Kazanka or Volzhanka, but Kazankas are often made of dural, which is prone to corrosion and requires careful care, while the "Kazanka" is often made of dural. AMG5MThe oxygens used in Oka lack this drawback. Voljanks can be more spacious, but they tend to be heavier and more expensive.
When compared to PVC boats, Oka 4 It loses weight and compact storage, but it gains in cross-country and durability. PVC is easy to pierce against a sharp stone or a snag, aluminum holds the impact. For those who fish in the rocky rivers of Siberia or the Urals, the choice often falls on metal.
In summary, we can say that the boat Oka 4 It's a great choice for those looking for a balance between price, reliability and functionality, and it doesn't claim to be a speedboat, but it's a reliable working tool for fishing and recreation, and when properly maintained, it can last for decades, going from father to son.
What is the maximum weight of the engine on the Eye 4?
The manufacturer recommends engines with a capacity of up to 10 hp However, the transom design allows you to install engines up to 12-15 hp When installing the engine more powerful than 10 hp, you must strictly monitor the loading of the boat and not exceed the recommended number of people, since speed and maneuverability will increase dramatically, and the margin of stability will decrease.
Should I paint an aluminum boat?
You don't have to paint the boat, because aluminum itself is covered in oxide film, which protects against corrosion, but the paint improves the appearance, hides scratches and prevents white oxides, and the colored boat is more visible on the water, which increases safety.
How many people are comfortably accommodated in the Oka 4 boat?
Technically, the boat can withstand up to 4 people, but comfortably it accommodates 2-3 people of average size. When fully loaded (4 people), free space almost disappears, and the stock of the side above the water becomes minimal, which is unsafe in choppy conditions.
Can I use the Oka 4 boat at sea?
Use in marine conditions is possible only in very calm weather and near the shore. AMG5M aluminum is resistant to salt water, but the flat bottom and low side make the boat unsuitable for open sea or large wave. It is exclusively river and lake vessel.