In the world of water-motor sports and amateur fishing legendary Iase 3 It has a special place, and has been a benchmark for reliability and simplicity for decades, and this flat-bottomed AMG5 aluminium-magnesium alloy boat has become a popular favorite because of its maintainability and ability to withstand extreme stress in shallow water conditions.
Many fishermen are still looking for information about maximum engine power And this is a model that's very different from the factory data, and the right engine and the right kind of refinement makes it possible to turn this simple body into a high-speed projectile or a stable trolling platform.
In this article, we will discuss the technical details, the drawings that will help with the restoration, and discuss the real possibilities of modernization, you will learn why this is the best alloy for Siberian rivers and how to safely increase the carrying capacity of the vessel.
History of creation and design features
Development of the boat Iaz It was conducted in the mid-1960s at the Novosibirsk plant "October Revolution", which specialized in aviation technology, and it was aviation standards of strength and technology of working with thin sheet metal that formed the basis of the design, which ensured its phenomenal durability.
The case is made by riveting method, which for aluminum boats is a more reliable solution than welding, since it eliminates the risk of cracks from vibration. Welds here are only present in the junction of the transom and the forehead, and the rest of the set is based on dense riveted joints with gaskets.
A unique feature is the use of the AMg5 alloy, which has high corrosion resistance and strength. Unlike the more common D16T, this material is practically free of intercrystalline corrosion, which is critical for boats stored on water.
Why the rivet?
The riveted joints allow the structure to “breathe” under temperature expansions and vibration loads without losing its tightness, while the hard weld can burst when hitting a wave or stone.
Technical specifications and dimensions
The dimensions of the boat are optimized for transportation on the roof of a passenger car or in a trailer, but its interior space allows three adults to comfortably accommodate. The weight of the hull in the basic configuration is about 80 kg, which is an acceptable indicator for a metal of this thickness.
The most important parameter is loading capacityThe sleeve, which is officially declared as 400 kg, but in practice the vessel carries much more, albeit with loss of driving qualities, the shape of the bottom provides excellent stability in the parking lot, which is highly appreciated by winter fishermen and fans of sheer flare.
| Parameter | Meaning | Note |
|---|---|---|
| Longest length | 4,500 mm | Excluding the attachments |
| largest width | 1200 mm | On the sides. |
| Height on midship | 450 mm | Could be built up. |
| Hull mass | 80 kg | No equipment. |
| Passenger capacity | 3 people. | Optimal for fishing |
It is worth noting that real-world measurements often show small deviations from factory data due to manual assembly in the Soviet era, so when buying a used copy, you always need to conduct a check of the transom and sides.
Engine installation and driving performance
The choice of motor for Iase 3 is debatable, since the factory instruction recommended motors with a capacity of up to 12 hp, However, practice has shown that the flat bottom allows you to plane even with a high-speed engine. 15-18 hp.Unless the boat is overloaded.
The flat bottom creates high drag on the wave, so the boat hits the oncoming wave hard. Comfortable driving at high speeds requires experience in driving and proper weight distribution of passengers closer to the nose.
When installing a motor above 10 hp, it is critical to strengthen the transom plate, as the regular one may not give out increased dynamic loads. Many owners weld additional scarves or change the transom material to thicker aluminum.
- 🚤 The optimal power for planing with one person is 8-10 hp.
- 🚤 For the transportation of two people and cargo, the power of 12-15 hp is considered comfortable.
- 🚤 The maximum safe power at full load should not exceed 18-20 hp.
The ideal balance of speed and safety for Yaz 3 is achieved with a 9.9-15 hp engine, which allows speeds of up to 25-30 km / h with moderate fuel consumption.
Drawings and diagrams for restoration
For those planning a restoration or construction of a copy, drawings Iase 3 The challenge is to keep the contours of the nose, which is a complex spatial shape, exactly the same.
Recovery requires special attention to the condition of riveted seams, often requiring a complete bulkhead with a replacement seal, and as a modern analogue of Soviet grease, you can use special sealants for aluminum structures.
Recommended procedure for work during bulkheading:1. Dismantling of all removable elements and seats.
Drilling of old rivets (drill 3.5 mm).
3. Cleaning of surfaces to metal.
Filling sheets and drilling new holes.
5. Sealing rivets with sealant.
If you don't have the skills to work with metal, you should consult a specialist, because a violation of riveting technology will lead to a rapid failure of the boat. Mistakes in the geometry of the transom can lead to a yaw of the vessel on the course.
⚠️ Attention: When drilling holes under new rivets, use drills of larger diameter than the rivet tail, otherwise the connection will be leaky and mobile.
Tuning and modernization of the boat
Yazei owners have traditionally approached tuning on a grand scale, turning the Spartan hull into a comfortable boat. console-control with a windscreen, which significantly increases the comfort of management.
Another important element of the upgrade is the installation of harundukes and gearboxes that serve as seats at the same time, which allows you to unload the cockpit and improve safety by eliminating rolling things down the bottom.
- 🛠 Installation of overhead translator to increase motor withdrawal.
- 🛠 Installation of soft seats on adjustable sleds.
- 🛠 Organization of niches under the battery and fuel tank in the nose.
Some enthusiasts are setting up on Iase 3 Even small cabins sheltered from the rain, although it is a significant sailing vessel and requires caution in the wind, the main thing in tuning is not to overdo the weight of the equipment.
☑️ Tuning Plan Yaz 3
Care, storage and security
Despite the strength of aluminum, the boat requires regular maintenance, and after each application, especially in salty or polluted water, the hull must be rinsed with fresh water, which prevents the accumulation of aggressive salts in rivet seams.
Keeping the boat upside down under the canopy is best, providing ventilation of the interior space. If the boat is standing on water, be sure to use antifouling coatings, as algae fouling increases weight and reduces speed.
⚠️ Attention: It is strictly forbidden to wash the aluminum case with aggressive chemistry or alkaline solutions, as this destroys the oxide film and leads to corrosion.
Periodically check the condition of the rivets, especially in the area of the cheekbones and transoms. The appearance of whitish plaque around the heads of the rivets signals the beginning of oxidative processes that require intervention.
For the preservation of aluminum boats for the winter, it is excellent to process special wax-based compounds that create a hydrophobic film and protect the metal from oxidation.
Comparison with modern analogues
Compared to modern AMG6 boats or imported ones, Iase 3 It's a great deal more expensive and affordable than repair parts, but it can be inferior in terms of ergonomics and weight to newer designs with more complex bottom geometry.
Modern materials make boats lighter, but often at the expense of durability; the Yazya’s Soviet strength allows it to compete with boats that cost three to four times more, making it a great choice for beginners.
If you are looking for a boat for frequent trips to wild water bodies, where there is a risk of damaging the bottom of rocks or ice, then a better option than good old-fashioned. aluminum-yazIt's hard to find. It's maintainable in the field.
Can I put a 20 hp engine on the Yaz 3?
Formally, the maximum power on the passport is 12 hp, but the enhanced transom and experience of operation allow you to put engines up to 20 hp.
How much weight can Yaz's boat bear?
The official payload is 400 kg, which includes the weight of passengers, cargo and the engine itself. In practice, the boat remains afloat at 600 kg, but the height of the board above the water becomes critically low, which is dangerous in choppy conditions. A safe load is considered 350-380 kg.
What to do to fix a leak in an aluminum boat?
Temporary water repairs can be done with cold welding for aluminum or special epoxy compounds with reinforcement mesh. Major repairs require riveting with a meadow or special sealant, since conventional argon welding at home is complex and requires skill.