The decision to purchase a reliable boat for fishing or resting on the water often leads the potential owner to the idea: Boat Ob to buyThis is not just a popular demand, but a de facto standard of quality in the small metal boat segment of the post-Soviet space, and the Aluminum Obi has proven to be a hard worker capable of withstanding harsh operating conditions, impacts on ice and rocks that would instantly disable any PVC.
But the market is now saturated with modifications, and the number of second-hand options is in the thousands, and the buyer has to choose between a new boat from the factory, a fresh model from the hands or a "grandfather's legacy" that requires serious resuscitation. classic It can be significantly different in terms of the body from Obi-3 or Ob-2.Not to mention modern clones.
In this article, we will take a closer look at what to look for when inspecting, what models are worth considering this year, and how to make sure you choose your engine. A properly selected boat will last decades, becoming a faithful companion on the water, while rash choices threaten to constantly repair and disappointment in water tourism.
Overview of popular modifications of the boat Ob
Before you look for ads, you need to clearly define the modification, because the Ob is a whole family of boats. Ob-MIt's a classic flat-bottom with a pointed nose, a tray board for an outboard motor hinge and two longitudinal harunduku cans. loading capacity It is about 400 kg, which allows you to comfortably accommodate three adult fishermen with full equipment.
For those looking for more comfort and speed, it is a great idea. Ob-3This model already has more developed keel-like contours of the hull, which greatly improves seaworthiness on the wave. Unlike flat-bottomed versions, Ob-3 is able to confidently hold the course in the wind and allows you to develop higher speeds.But it costs a lot more body mass and, as a result, a more powerful engine.
Special attention deserves Ob-2. and its modification Ob-2MThis is a transitional option between a pure flat-bottom and a keel boat, and they are often equipped with higher sides, which improves safety on the water. These are the models that are less common when looking for a used version, because they were less popular with the mass buyer because of the price, but they are best suited for serious operation.
When choosing a particular model, it is important to consider not only the geometry of the hull, but also the year of release. Older boats produced during the Soviet period often have thicker metal, but can suffer from structural fatigue. Modern versions may be lighter, but the quality of welding and alloying sometimes raises questions from picky experts.
Criteria for selection: new or used boat
The dilemma of “new or used” is faced by everyone who has decided to Boat Ob to buyBuying a new product from the factory or from an authorized dealer guarantees that there are no hidden defects and corrosion. aluminum-alloyIt's packed with a lot of stuff, and it's a certainty that the boat didn't sink or get repaired by barbaric methods, but the cost of new models has increased dramatically in recent years, making them less affordable.
The used boat market is huge and attractive at a price, and you can find a great option for a third of the cost of a new one, but the risks are obvious: microcracks in the seams, digested transoms, hidden corrosion and deformation of the bottom geometry. Often sellers hide the fact that the boat is used for commercial purposes or in the north, where the load on the hull was extreme.
Why are the old Ob boats so popular?
Soviet and early post-Soviet aluminum boats were often made of thicker and better-quality AMG alloy. Modern budget versions can have thinner walls, which requires more careful handling. However, older boats have a huge resource of winding a motorcycle clock if not smashed against stones.
If you have a budget, finding a used option is the only way to go, but you have to be meticulous, ask for the history of the boat, check your documents, and most importantly, do a thorough visual and tactile inspection, and spend a day looking at the three options, rather than regretting buying a problem bucket.
An important aspect is the configuration. A new boat is often sold in the "base": only the hull. In the used market, the boat can come complete with an anchor, awnings, seats and even a motor. Sometimes it is more profitable to buy an old set on a turnkey basis than to equip a new boat from scratch, buying all the accessories separately at retail prices.
Technical inspection of the body before purchase
The process of inspecting an aluminum boat requires careful attention and, preferably, the presence of a flashlight and a rag. turret This is the most loaded element, it should not be cracked, it should not be bloated paint (which indicates corrosion under it), or traces of sloppy welding. If the transom is cruising or has traces of repair, it is better to refrain from buying.
Then we go to the bottom and the sides, and you run your hand over all the welds, and they should be smooth, without interruptions, and the sinks, and you should pay special attention to the zygomatic seams, which are the joints between the bottom and the sides, and this is where the most frequent leaks are caused by the impact of the wave or rocks, and the presence of numerous patches ("bugs") is a warning signal that the metal is tired or the boat has been exploited extremely aggressively.
☑️ Checklist for the inspection of the boat Ob
Be sure to look inside the rundooks. Often there is water that accumulates, which for years destroys the metal from the inside, the smell of dampness or the presence of rust (if the rundukes are steel, as is the case with older models) is unacceptable. Aluminum does not rust, but oxidizes, turning into a white powder — if you see a lot of it, then the corrosion process is active.
⚠️ Warning: Never buy a boat if the interior is painted with opaque paint that hides metal; under the paint layer, cracks, corrosion holes or defective patches may be hidden; pure aluminum or transparent varnish are signs of an honest seller.
The buoyancy test completes the inspection. Ideally, the boat should be launched. If that is not possible, turn it upside down and inspect it carefully from the outside. Any bumps in the keel or bottom that you can see will (determinate) the driving and handling on the water.
Power selection of the outboard motor
The question of which motor to put is the second most important question after the choice of the boat itself. Ob-M With a flat bottom, the optimal power is considered to be a range of 5 to 9.9 hp The engine of 5 hp will allow you to comfortably move with one or two passengers against the current, but there will be no plane with a full load. This is a displacement mode, calm and economical.
To get the Ob-M to plane, you need power from 8 hp and up, but here's the nuance: the plane flat-bottle becomes less resistant to lateral wind and requires experienced control. transom board It must withstand the weight of the motor and the vibrations it creates without backlashes.
For models Ob-3 and Ob-2. The keel contours are better at steering but have greater water resistance at launch, with a minimum comfort power of 9.9 hp and an optimum power of 15 hp and above, and this tandem will allow speeds of up to 30-35 km/h with full load, which is critical for overcoming large water areas and outdoor water.
When choosing an engine, consider not only the power, but also the length of the lower unit. For Obi, a short leg (S) is optimal, since the transom of these boats is low. A long leg (L) may require a wire insert or lead to cavitation and overheating.
You don't have to chase beyond the power, you can use a 30-horsepower engine on a lightweight Ob-M to turn fishing into a high-risk extreme ride, you can design a boat that matches the power of the engine, and you can always check the data-sheet figures of the specific model that gives you the maximum power allowed.
Comparative table of model specifications
To organize information and simplify choice, we will give the main technical parameters of popular modifications in a comparative table. The data may vary slightly depending on the year of manufacture and the specific manufacturer, since many factories copy the boat.
| Parameter | OBUM (Classic) | Ob-2/2M | Ob-3 (Keelaya) |
|---|---|---|---|
| Length, m | 4.50 | 4.55 | 4.60 |
| Width, m. | 1.60 | 1.65 | 1.70 |
| Load capacity, kg | 400 | 450 | 500 |
| Passenger capacity | 3 people. | 4 people. | 4 people. |
| River power. Engine power. | 5-10 hp. | 8-15 hp | 15-25 hp. |
As can be seen from the table, the difference in dimensions between models is small, but it significantly affects the capacity and stability. Ob-3 It wins in comfort and safety on the wave, but loses in weight and engine requirements. Ob-M It remains the king of shallow water and overgrown rivers due to its minimal precipitation.
When choosing between models, start from the geography of your future voyages. For small rivers, lakes and fishing in reeds, it makes no sense to overpay for a wide keel boat. For Ladoga, Onega or reservoirs. keeliness The bottom becomes a safety issue, and here the choice is narrowed to more seaworthy options.
Transport and storage of the boat
One of the reasons Ob boats are so popular is their transportability, and unlike heavy fiberglass boats, an aluminum boat can be flipped over and placed on the roof of a car, with two people and a minimum of equipment, but an empty Ob is about 100 to 120 kg, which requires physical training when loading.
For regular trips to the water, many owners buy or make trailers DIY. The boat fits perfectly on standard lozenges or roller supports. When transporting long distances, be sure to use safety belts, passing them through the water. pyre or around the transom to prevent displacement of the body.
Aluminum boats are not afraid of frost, but when stored outside in winter they must be turned upside down so that snow and ice do not accumulate inside, creating an extra load.
Storage of the boat requires no special conditions. Aluminum does not rot, does not dry or require drying after every fishing, like a tree. However, it is recommended to wash the boat periodically with fresh water, especially after operating in salt water, to wash off salt deposits that can cause electrochemical corrosion in places of contact with other metals.
⚠️ Warning: When installing a boat for winter storage, do not cover it with a sealed awning close to the hull. The metal must "breathe", otherwise the condensate formed during temperature changes will lead to whitish oxides on aluminum.
Frequently Asked Questions (FAQ)
How much does the new boat OB cost in 2026?
The price of the new boat Ob-M starts from about 80-90 thousand rubles, but can reach 120 thousand rubles, depending on the configuration and the manufacturer. Models Ob-3 and Ob-2 are more expensive - in the range of 130-160 thousand rubles. Prices on the used market vary from 20 to 60 thousand rubles depending on the condition.
Can I make a crack in the boat Ob on my own?
Yes, aluminum is weldable, but it requires a special machine (argono-arc welding) and skills. Normal electric welding of aluminum will not take. For small cracks, you can use special two-component epoxy compounds with aluminum powder or cold welding for metal, but this is a temporary solution.
What is the maximum speed of the boat Ob with an engine of 9.9 hp?
With the engine 9.9 hp (realistically about 8-9 forces) Ob-M with one driver accelerates to 25-28 km / h With a full load (3 people) the speed drops to 18-20 km / h, and the boat may not get on plane, remaining in displacement mode.
Do I need to register the boat Ob in GIMS?
Since 2021, the rules have changed: boats weighing up to 200 kg (including engine weight) with engines up to 8 kW (about 10.8 hp) are not subject to registration. Since the weight of the Ob with a light engine usually fits into 200 kg, registration is often not required.