When choosing an aluminum boat for fishing or a family holiday on the water, one of the paramount questions is always its weight. It is from this parameter that the choice of engine, the possibility of transporting on the roof of a passenger car and overall handling on the water depends. Kazan 5M4 It is often the focus of attention of water motors, but the exact figures of its weight in different sources may differ, causing confusion among buyers.
The actual weight of a boat is not only the mass of the clean hull, but also the attachments, cans, windscreen and, of course, the engine. Understanding how much your boat really weighs is critical to safe operation and compliance with GIMS requirements. In this article, we will analyze all the nuances of the mass of this popular model, based on factory data and the experience of real owners.
It should be noted immediately that hull and full-body The manufacturer gives the baseline values, but years of operation, additional tuning and bottom fouling can change these values significantly. Let's look at what makes up the weight of this workhorse in domestic shipbuilding.
Factory specifications and body weight
Officially declared weight of the boat hull Kazan 5M4 Without a hanging and equipment, it is 190 kilograms, a basic figure that should be used when planning transportation, but in practice, finding a boat in this sterile state is almost impossible, since even a minimum set for getting on the water significantly increases the total mass.
The body is made of duraluminium alloys, which provides good strength at a relatively low weight compared to steel counterparts. However, 190 kg is a tangible weight that requires a reliable trailer or a powerful winch to lift on a slip.
⚠️ Note: When buying used boats, keep in mind that the weight of the hull can be increased due to welded additional elements, repair of holes or installation of stationary mounts not specified in the factory specification.
It is important to distinguish between modifications, as earlier versions such as Kazan 5M or 5M2They had a slightly different geometry and weight. 5M4 It had enlarged cheekbones and a changed shape of the nose, which added stability, but also slightly affected the mass. For an accurate understanding of the dimensions and weight, it is useful to know that the body is 4500 mm long and the width is 1600 mm.
Effect of attachments on total weight
If you plan to transport a boat in the top trunk of a passenger car, you need to consider the weight of not only the "naked" hull, but the entire hinge. Kazanka 5M4, adds to the total weight of about 15-20 kilograms depending on the frame design and type of glazing.
The feed cans and paiolas also contribute. A standard two-can set can weigh between 10 and 15 kilograms. If you install reinforced soft-liner seats or extra hazelnuts, the weight will increase in proportion to the amount of equipment you have installed, which directly affects how much payload you have left for passengers and gear.
- 🚤 Windscreen assembly with fastenings: 18 kg
- 🪑 Package of cans (nose / feed): 12 kg
- ⚓ Anchor box and lashes: 5-7 kg
- 🔋 Battery fasteners and boxes: 4 kg
It's also worth remembering the weight of paint or antifouling if you're going to upgrade the look of the vessel. A few layers of enamel can add another 5-10 kilograms, which is a significant addition on a small boat. loading capacityAlways keep a reserve of 10-15% of passport values.
☑️ Pre-weighing check
Engine weight and its impact on stability
One of the key factors determining the behavior of a boat on the water is the power and, accordingly, the weight of the outboard motor. Kazan 5M4 The recommended engine power varies, but most often owners choose engines in the range from 30 to 50 hp The weight of such an engine can vary from 25 to 90 kilograms, which is a significant part of the total weight of the vessel.
The positioning of this weight on the transom is critical to trim and stability. A motor that is too heavy can cause the bow of the boat to bury on the go or, conversely, to over-boil the nose with a low load. It is important to keep a balance: if you are installing a heavy four-stroke engine, you may need to redistribute the load in the bow.
Compare the weight of popular engines that are often put on this model:
| Motor model | Power (hp) | Approximate weight (kg) | Type |
|---|---|---|---|
| Yamaha 30HMHS | 30 | 54.5 | two-stroke |
| Tohatsu M50DS | 50 | 84.0 | two-stroke |
| Yamaha F40FETL | 40 | 106.0 | four-stroke |
| Mercury 30 EFI | 30 | 57.0 | two-stroke |
As you can see from the table, the transition to a four-stroke technique significantly increases the weight of the feed. stability-passport Excessive weight on the transom can lead to dangerous rolling or even tipping over in sharp maneuvers.
Can I put a motor more powerful than 50 hp?
Theoretically, the transom will survive, but it violates the safety certificate, increasing power above the recommended dramatically reduces stability at low speeds and in chop, making the boat dangerous to the crew.
Transport and load limit
Issue of transport Kazan 5M4 The total weight of a boat assembled with an engine often exceeds 300-350 kilograms. Even if you remove the engine and the hinge, the hull weight of 190 kg requires the participation of at least two strong people or the use of special lifting equipment.
For legal rooftop transportation, the capacity of the car and the roof trunk must be taken into account. Most regular trunks are designed for 75 kg, which is categorically not enough for Kazanka. The use of specialized boat trailers is a safer and more convenient solution, eliminating the risk of damage to the car body or roof.
When calculating the maximum load of people and cargo, the rule should be guided by the rule: the total weight of passengers and equipment should not exceed 400 kg. This value includes the weight of the crew itself, fuel in tanks, anchors, gear and personal belongings.
⚠️ Attention: When the boat is fully loaded by people (5 people of 80 kg = 400 kg), the installation of additional cargo in the kunduks is prohibited, as this will lead to excess of the maximum carrying capacity and loss of buoyancy reserve.
Weight distribution within the cockpit also plays a role: Heavy batteries and toolboxes are better placed closer to the diametric plane and not above floor level, so as not to raise the center of gravity, and this is especially true for flat-bottomed aluminum boats, which tend to be sharp-tight.
Comparison with analogues and modifications
To better understand the place Kazan 5M4 In the aluminum boat range, it's useful to compare its weight to its closest competitors and predecessors. Kazan 5M7 It has similar dimensions, but due to the changed geometry and materials, it can differ in weight, although it often remains within 200 kg.
The Wind or Ob boats are also popular alternatives. Kazanka It's traditionally considered a heavier, more durable structure, which affects its inertia and handling when windy. Heavy housing is better at cutting wavelengths, but requires a more powerful motor to go full load plane.
- 🛶 Kazan 5M2: ~185 kg (lighter but less stable body)
- 🛶 Kazan 5M4: ~190 kg (golden mean for stability)
- 🛶 Kazan 5M7: ~200+ kg (reinforced construction)
- 🛶 Ob-3: ~140 kg (much lighter but smaller in size)
When choosing between these models, it is worth considering not only dry weight figures, but also operating conditions. For small rivers and lakes, where ease of pulling ashore is important, weight of 190 kg can seem excessive. For large reservoirs and Ladoga, this mass is a safety advantage.
To make it easier to pull the boat ashore, use special wheel supports (cat-wheels) that are temporarily attached to the transom, which will allow one person to cope with the weight of 200 kg on a gently sandy beach.
Practical advice on weighing and accounting
If you need to know the exact weight of your boat for a technical inspection or registration with GIMS, it is best to use a car scale.
The weighing procedure requires carefulness, the boat is placed on a platform of scales, having previously made sure that there is no water in the hold, the difference between the passport weight and the actual weight can be up to 20-30 kg over the years of service due to the absorption of moisture by wooden elements (if any) and the accumulation of dirt in hard-to-reach places.
For registration in the register of small craft, the mass of the boat in service is indicated, including the weight of the hull, permanent equipment (anchors, ends, life jackets, scoops), the engine is usually not included in this mass unless it is stationary, but its weight is taken into account in calculating the total capacity to determine the amount of tax.
The exact weight of the Kazanka 5M4 boat with a hinge is about 220-230 kg, which requires the use of a trailer for safe transportation and excludes the possibility of regular transportation on the roof of a passenger car alone.
How to reduce the weight of a boat for transportation?
There are several ways to make the boat easier: replacing heavy wooden cans with aluminum profiles, dismantling the windscreen during transportation, using lithium batteries instead of lead (saving up to 15 kg) and abandoning stationary hazelnuts in favor of soft sealants.
Does weight affect the speed of Kazanka 5M4?
Of course, 50 kilograms of weight can reduce top speeds by 3-5 km/h and increase fuel consumption, and the heavy boat takes longer to glid, which increases fuel consumption during acceleration.
Do I need to outweigh the boat when selling?
The law does not require weighing in a sale transaction if the documents (boat registration certificate) are in order, but an honest seller may suggest that the buyer verify that the weight corresponds to the declared specifications, especially if the boat has been seriously tuned.
Which trailer to choose for Kazanka 5M4?
The optimal solution will be a single-axle trailer with a gross weight of up to 750 kg (category B). This will allow you to carry a motorized boat and additional load without having to open category E. It is important to have lodgings or keel support for the correct fixation of the hull.