The market of boating technology is booming, and interest in metal-watercraft It's not going to go away even in a high inflation environment. aluminum-boat Aluminum is often the only reasonable trade-off between wanting a reliable boat and having a limited budget: Aluminum is durable, rot-free and impact-resistant, making it an ideal candidate for reuse.
But unlike PVC, metal hides its defects deeper, and if you see a puncture on an inflatable boat right away, a crack in the weld or a weld fatigue can show up on the water, creating a critical situation. In this article, we'll look at all the nuances of choice, from assessing the state of the alloy to checking the geometry of the bottom, so that your first purchase is not your last.
Should you save on the case? Definitely, if you know where to look for hidden defects. B/y aluminum boats Often sold for changing interests, not technical problems, and the right approach to inspection will allow you to get an aluminum that will last for decades, while maintaining a significant part of the family budget.
The first thing that customers face is a variety of designs: there are all-welded housings, riveted structures and combinations, each type has its own specifications of operation and, importantly for us, its own characteristic "diseases" when buying from hand.
The benefits and risks of buying used aluminum
The main trump card of aluminum is its corrosion resistanceUnlike steel, aluminum doesn't rust as we know it, it's coated with an oxide film that protects the material from further destruction, which is why boats 20 to 30 years old often look like they left the assembly line yesterday, but this is only true for quality alloys like this. AMG5 or AMG61.
The risks of buying used equipment are primarily human-caused, and the previous owner could have operated the vessel in extreme conditions, overloaded it or stored it without proper care. Underfloor deformation from impacts on stones or logs is a common problem that affects driving performance and stability.
⚠️ Note: If the seller claims that the boat is “water only” but there are traces of rust from bolts or engine mounting on the transom, this is an indication that the boat was in water without canning, which could lead to electrochemical corrosion.
The important aspect is liquidity. A good aluminum boat is easy to sell because demand is stable. But a bad boat with dents and leaks and a crooked bottom, you'll sell for years. So it's better to pay for a quality boat than to spend money and nerves on it. hull-break.
Diagnostics of the body: welding, riveting and geometry
You should start by visually assessing the geometry, stand in the nose or stern and look along the side, the line of the side should be flat, without breaks and waves. If you see that the side is cruising, then the boat has once hit or twisted hard. For welded boats, this can mean a violation. framework-strength.
Pay special attention to welds. They should be smooth, without interruptions and visible pores. Look for traces of re-welding, they are often given out by a darker color or uneven structure of the roller. If the seam was digested in an artisanal way, there is a high risk that the metal has lost its properties and became brittle in the zone of thermal influence.
Stacked boats, like the old Kazankas or Volzhankas, require rivet checks. Look at each row. If you see some rivets replaced by nut bolts or sealed screws, that's a red flag. The boat has flowed and has been sealed temporarily.
- 🔍 Examine the bottom for dents: deep dents disrupt hydrodynamics and can become hotbeds of metal stress.
- 🔍 Check welded elements: pencils, cans and knobs should not have cracks at the base.
- 🔍 Assess the condition of the floorboards: if the wooden deck has rotted, this is a sign that the boat has not been engaged in a long time.
The geometry of the transom is critical. The plane where the motor is attached must be perfectly flat, and the transom skew will cause the boat to drift away ("scour") even on a straight course, and the engine will work with overload.
Train and suspension of the engine: zone of maximum load
The trans is the heart of your boat's power plant, and that's where the maximum vibration loads are concentrated. When you buy a used aluminum boat, the condition of that zone determines whether you can safely use the powerful power of the boat. outboard.
If you see cracks on the aluminum wafer of the transom, it's dangerous to buy a boat, and cracks in the transom can grow quickly under the vibration of the engine, which can lead to loss of the motor in the water.
Notice the strengthening of the transom. On many boats (like the Crimea or Ob), the transmolina is reinforced with a wooden lining. Check the condition of the tree. If it turns black, soft or stratified, moisture penetrates the structure. Wet wood inside an aluminum sandwich is a guarantee of rapid corrosion of the metal from the inside.
⚠️ Warning: Never buy a boat if the transom has a visible deflection backwards, which means that the previous owner was more powerful than the recommended one, and the metal structure has already broken.
Also check the presence and condition. springs The spring must be resilient, without cracks, and if it breaks, it will transmit all the waves to the body and passengers.
Comparison of popular models: what to look for on the secondary
The used boat market is full of different models, and to avoid confusion, we've compiled a comparative table of the popular aluminiums that customers are most likely to look for, each with its own fans and its own typical problems.
| Model boat | Type of body | Typical b/w problems | Recommended engine power |
|---|---|---|---|
| Kazanka-M | Glepanic | Leaks on rivets, corrosion of the bottom | up to 12 hp |
| Krym-M | Welded | Cracks in the zygomatic joints, soft transom | 30 hp. |
| Ob-3 | Welded | Low stability, tight cockpit | 25 hp. |
| Volzhanka-28 | Welded | Difficulty in finding spare parts, heavy weight | up to 40 hp |
When choosing a model, it is important to consider not only the specifications, but also the availability of spare parts. Kazan or Crimea Parts and forums with repair tips are easy to find, and exotic or old models can be a maintenance problem.
The weight of the boat is another important factor: Aluminum boats are heavier than PVC but lighter than fiberglass. However, if you plan to often carry a boat on the roof of a passenger car, make sure that its weight does not exceed the permissible limits for your car and the forces to lift.
Checking for leakage and hidden defects
The most important step is to test the water, and even if the seller swears that the boat is "dry as a tear," the only thing to believe is the facts, the ideal is to get on the water and launch the boat into the water, and if that's not possible, you'll have to do the tests on land.
To check on land, turn the boat upside down. Pour water into the bow and the aft corners. Leave it for 15-20 minutes. Put it under the joints of sheets of paper or dry rags. Wet spots indicate microcracks or leaky seams.
Notice the smell inside the boat, and the musty smell, the smell of rotten wood or dampness, suggests that the boat was not stored properly, possibly under a tent with residues of water, which is not only fraught with discomfort, but also with accelerated corrosion.
- 🛠 Check the condition of the bottom stoppers (if any): they should be easily twisted and have whole rubber seals.
- 🛠 Check the internal partitions: they should not have traces of dried water or rusty undertrenchments.
- 🛠 Shake the boat: An extraneous rattling sound may indicate loose attachment elements or debris in the hold.
If you find a leak, don't rush to give up. Most leaks are remediable in aluminum. It's important to evaluate the scale of the work: making a 2 mm hole is one thing, changing the bottom sheet is another.
☑️ Checklist of inspection of used boat
Legal aspects and documents
Buying a used boat is not only a technical process, but also a legal one. In Russia, small-sized vessels are subject to registration with the SIMS of the Ministry of Emergency Situations if their length is more than 3 meters or the weight of the equipped vessel exceeds 200 kg (with the engine), However, even if the boat does not require registration, documents are needed to confirm ownership.
The main document is the Sale Agreement (PST), which can be written by hand in free form, with the passport details of the seller and the buyer, the VIN number (or hull number) of the boat, the model and the year of issue, without this document, you can not prove that the boat is yours, if you check on the water.
⚠️ Warning: If the seller does not have any documents for the boat (no passport, no checks, no old registration), you risk buying stolen property.
It's also worth checking if the boat is mortgaged, and although there is a movable property mortgage registry, it's hard to actually check a private boat, so trust and honesty are important.
Next Post:Should I take used aluminum?
Buying a used aluminum boat is a lottery that you can win if you're careful. Aluminum forgives many operational errors, but it doesn't tolerate negligence in service. If you find a specimen with a whole hull and a flat transom, you get a reliable boat for a fraction of the cost of a new one.
Don't be afraid to ask the seller uncomfortable questions and ask for detailed inspection. Good goods don't need advertising, and bad ones are better avoided. tightness of welds and absence of cracks in the transom These are two critical parameters that should not be ignored under any circumstances.
Ultimately, a well-chosen used boat will give you hundreds of hours of enjoyable fishing and water rest. Aluminum ages slowly, and with proper care, the old lady will serve faithfully for years to come, transporting you through any water barrier.
Can I make a crack in an aluminum boat by myself?
Theoretically, you can if you have argon welding machine and aluminum welding skills, but aluminum requires preheating and stripping of the oxide film, and without experience, you're at high risk of burning through a thin bottom or creating new stresses in the metal, and you'd better trust the professionals.
What is the life of an aluminum boat?
When properly operated and stored (dry, on a trailer or suspension), an aluminum boat can last 30-50 years or more.
Do I need to paint an aluminum boat inside?
Painting inside is not necessary if you are satisfied with the appearance of the metal, but painting with special anti-corrosion paints (for example, epoxy) will facilitate care, prevent oxidation and make it easier to wash away dirt and fish mucus.
How to store an aluminum boat in winter?
Ideal storage is indoors (garage, shed) in an inverted form or on special kilblocks. If the boat remains outside, it must be turned upside down, remove the engine and cover with a breathable awning so that snow and condensation do not accumulate inside.