Decision to acquire aluminum-boat It is often a turning point for a fisherman who has outgrown the capabilities of inflatable PVC vessels. Ob 3M Metal Service is one of the most discussed options on the Russian market, a classic “working” option for reservoirs and rivers with moderate currents, which attracts affordable price and maintainability.
However, in order to Buy a boat, Ob 3MIt's important to understand that you're not just buying a piece of metal with a motor, but a specific set of specifications that is not suitable for everyone. AMG5MThe magnesium-manganese alloys used in manufacturing are highly weldable, but require careful treatment of corrosion. Unlike magnesium-manganese alloys, this material is less resistant to electrochemical processes, which imposes its own limitations on operation.
In this article, we will take a look at the pros and cons so you can make an informed decision, and you will learn about the real speed figures, the comfort of seating passengers and the hidden nuances that are not discussed in the cabins.
Design features and build quality
The hull is made of 2 mm thick sheet aluminum, which is standard for the budget segment. Welds are usually made by argon-arc welding, which ensures high leakage, but visually may not always look aesthetically pleasing. transom plate reinforced and designed for the engine hinge with a capacity of up to 30 hp, although many owners put more powerful units.
⚠️ Warning: When accepting a new boat, be sure to check the quality of the welds inside the cockpit. Sharp edges can damage the equipment or even the fisherman's clothes, so they should be treated with a file immediately after purchase.
The design of the bottom assumes moderate keeliness, which allows you to feel more confident on the wavelength compared to flat-bottomers, but still inferior to marine modifications. Ob 3M Often praised for the spacious cockpit, but it is worth considering that the lack of runduks in the basic configuration makes you decide the issue of storing things yourself.
The secret of durability
Why does AMG5M crack? The AMG5M alloy (Aluminum-Magnesium 5%) has high ductility but low hardness. When hitting hard waves frequently at high speed, microcracks of metal fatigue can occur in the zygomatic bend.
Capacity and ergonomics of the cockpit
One of the main reasons why they are being Buy a boat, Ob 3MThis allows three to four adults to comfortably accommodate, although rated carrying capacity is often limited to 400 kg, taking into account the weight of the motor and equipment, and the body width on the cheekbone is 1600 mm, which provides acceptable stability in the parking lot.
The ergonomics of the driver and passengers seat require improvements. Base seats (banks) are simple aluminum sheets that are cold in winter and can be uncomfortable in summer, many owners immediately change them to soft overhead cushions or install seats on swivel bases.
- 🚣 Passenger capacity: Comfortable for 2-3 people, maximum permissible 4 people with an even distribution of weight.
- 🎣 Fishing niches: In the basic version there are no, it is required to install boxes or fasteners under rods.
- ⚓ Manageability: At low speeds, the boat can be slick, requiring constant control by the tiller.
It is worth noting that the height of the board allows you to feel confident even when fishing actively, but a low landing in the cockpit can be uncomfortable for people of tall height. Ob 3M It was designed as a utilitarian vessel, so the comfort here is secondary to the functionality.
Driving qualities and compatible motors
The acceleration dynamics and maximum speed directly depend on the engine chosen. For this model, the “golden mean” are engines with a capacity of 15-20 hp With weaker engines, the boat goes on plane with only one person on board, and with more powerful ones there is a risk of damaging the transom or getting uncomfortable vibration.
When installing a 20 hp engine with a screw under load, the speed with one driver can reach 30-32 km / h. However, if you plan to often walk full load (3 people + tackle), then motor-power It's important to choose the right pitch of the propeller so that you don't overload the engine on the planing.
At a wave length of more than 0.5 meters, the course becomes rigid, typical of all aluminum boats with a flat or low-kilvate bottom. Water impacts are transmitted to the spine, so it is recommended to use shock absorbing seats. Ob 3M It behaves predictably and sustainably.
Comparison with competitors: specifications table
To objectively assess whether it is worth Buy a boat, Ob 3MIt's a very competitive price, and it's a very competitive price, and there are models from Salyut, Crimea and various modifications from Reef, and you can see the key parameters here.
| Parameter | Ob 3M | Salute 410 | Crimea 3 | Reef 330 |
|---|---|---|---|---|
| Length, mm | 4000 | 4100 | 3850 | 3300 |
| Width, mm | 1600 | 1500 | 1500 | 1450 |
| Body weight, kg | ~130 | ~125 | ~110 | ~95 |
| River. motor, hp. | 30 | 30 | 25 | 15 |
As you can see from the table, Ob 3M It's a big winner in width, which gives you more interior space, but it's a big loser in weight to more modern, lightweight competitors like the Reef, which makes it a pretty time-consuming task to transport on the roof of a passenger car without the need for a special trailer or powerful overhead trunks.
Use a Teflon spray to treat aluminum surfaces before winter storage – this will significantly reduce oxidation and make it easier to wash in the spring.
Transport and storage
The empty body weighs about 130 kg, making it almost impossible for one person to lift it, requiring at least two people to get on the water and load it onto the car, or using a wheel trolley, and it is critical to follow the mounting rules when transporting on the roof of the car to avoid deformation of the bottom.
Storage In winter, the boats must be turned upside down or mounted on kilblocks to prevent the accumulation of snow and water inside. Aluminum is not afraid of frost, but the cycles of freezing moisture in microcracks can be fatal.
- 🚗 Transport: Requires reliable crosses at least 50 cm wide to distribute the load.
- 🏠 Garage: The ideal storage location, protecting from ultraviolet light and precipitation.
- 🌊 Conservation: Before storage, be sure to wash the case with fresh water, especially if the operation was in salt water.
⚠️ Warning: Never leave a boat on the water in a long parking lot without antifouling treatment or ashore. Watering with algae and shells creates a galvanic pair that accelerates the corrosion of aluminum by dozens of times.
Content budget and tuning
Buying is just the beginning of the cost. An aluminum boat is cheaper than PVC because it doesn't fear fire sparks or sharp branches. However, painting and restoring the coating can be costly. Many owners order powder paint or apply liquid rubber immediately after buying to insulate and protect against scratches.
A popular direction of tuning for Ob 3M installation balloon This dramatically changes the behavior of the boat on the wave, adds buoyancy and safety, but increases sailing and weight, and often install windshields and transformer awnings to protect against rain.
☑️ Checklist before first water
Frequently Asked Questions (FAQ)
Can Ob 3M be used on Ladoga or Onega?
Use on large lakes with unpredictable waves, such as Ladoga or Onega, is possible only in calm weather and in close proximity to the shore. Outdoor access to open water when turbulent above 0.5 meters on this model is strongly discouraged due to low seaworthiness and the risk of flooding.
What is the real life of an aluminum boat?
With careful operation and the absence of mechanical damage (strikes on stones, logs), the case of the AMg5M alloy can serve 15-20 years or more. The main enemy is electrochemical corrosion that occurs when in contact with other metals or wandering currents, so it is important to monitor the state of anode protection, if it is installed.
Do I need to register 3M in GIMS?
Yes, if the mass of the boat in service (hull + engine + tank + equipment) exceeds 200 kg, or if the engine power is more than 8 kW (about 10.88 hp). Ob 3M weighs about 130 kg, the installation of a motor with a capacity of 10 hp already brings the kit to the mandatory registration area.
What is the main problem when buying a used 3M?
The main problem is hidden cracks in the welds and bottom. When buying a used version, be sure to fill the boat with water (or use a vacuum cleaner in soapy solution) to find micro-fistulas that are not visible to the eye in a dry state.
Ob 3M is a compromise choice for those who need a roomy and inexpensive aluminum boat for calm water bodies, ready to put up with a hard drive for the sake of carrying capacity.
Finally, the decision Buy a boat, Ob 3M It should be based on a sober assessment of your fishing conditions, a reliable "worker" for lakes, rivers with quiet currents and reservoirs, which, if properly maintained, will last for many years. However, if you plan frequent outings on large waters or value comfort over carrying capacity, it may be worth considering more seaworthy options or boats with inflatable tubes.