Choosing the first boat is always a balance between the desire to save money and the need to get a reliable tool for fishing or recreation. aluminum boat When combined with a 9.9 hp engine, it is considered the “gold standard” for beginners, a combination that not only allows threesomes to confidently go out on the water, but also does not require category B rights to drive, since the power does not formally exceed the 10 hp threshold. However, despite its apparent simplicity, the market offers many options where it is easy to get confused.
Many beginners mistakenly believe that any "Kazanka" or "Voronezh" is suitable for installing such a motor, but this is not quite so. transom loadsIn this article, we will discuss in detail why aluminum + 9.9 hp is one of the most popular bundles in the CIS, what to look for when buying a used boat and how to avoid fatal errors during operation.
Why 9.9 HP and Aluminum are so popular
The popularity of this configuration is due not only to the legal aspects of registration, but also to the purely technical specifications. deforced This means you get a robust cylinder block with a margin of safety that operates in gentle mode. The aluminum body, in turn, provides the necessary rigidity for the installation of an attachment motor, which is often lacking in PVC boats of the middle price segment.
Besides, aluminum (mostly AMG or D16T) perfectly tolerate impact loads on rocks and sand, which is critical for shallow water. Unlike plastic, aluminum does not crack from impact, but only deforms, which often allows you to continue driving to the parking lot. 9.9 hp does not require a complex hydraulic lift system or powerful transom wheels, since the weight of the engine itself is only about 25-30 kg, which makes it easy to lift manually.
And the economics is also important, because the fuel consumption of these engines is minimal, and the installation is possible. electric motor As an additional propulsion system, it makes the kit versatile, so you can go silently to the fishing point on electricity, and you can go home on gasoline, saving battery charge. This is especially true for those who plan to use the boat not only for fishing, but also for cruising with family.
Technical requirements for the body and transom
When you're going to have a 9.9 hp boat, the first thing you need to do is to evaluate the transom, and that part of the body takes over the entire propeller's thrust, and for that kind of engine, the transompane should be the standard height. 381 mm (15 inches) or 508 mm (20 inches)Although 9.9 hp is more likely to use a short leg, if you buy an old Soviet boat, make sure the transom is free of corrosion and reinforced with a wooden lining.
The second critical parameter is loading capacityThe engine 9.9 hp is able to bring to the planing boat with a total load of up to 250-300 kg. However, if the hull is too heavy (for example, the old heavy modifications of the Kazanka), the boat may not go to the plane, but will only "dig" water, in which case you lose speed and efficiency, and the engine will work at the limit.
⚠️ Attention: Never install a motor more powerful than the recommended one for this model, even if the transom looks strong. Excess power can lead to a boat tipping over at full speed due to a sharp change in the trim.
Also worth noting is the keelson, which is a longitudinal beam that runs along the bottom, which is reinforced on aluminum boats for an outboard motor. If the keelson is thin or absent, when you go to the stern planing, you can start to "scour" it, which makes the control dangerous. For a 9.9 hp engine, the optimal length of the hull is from 3.5 to 4.5 meters.
When buying a used aluminum boat, be sure to check the rivets for oxidation. The white plaque around them is a sign of the onset of corrosion, which must be immediately stopped with special compounds.
Comparison of popular models: Kazanka, Voronezh, Crimea
There are still many models in the secondary market and in production that are perfectly suited to our engine. "Kazanka"The 2M, 5 and 5M are a workhorse that forgives many of the mistakes of beginners. Kazanka-M has improved seaworthiness thanks to zygomatic splashers, which makes it an excellent choice for large bodies of water.
Boats of the Voronezh type (for example, Voronezh-M) often have a flatter bottom, which is good for shallow water, but worse affects the course along the wave. The engine 9.9 hp on such a boat will give excellent speed with low load, but at full load comfort will decrease. "Crimea" is already a heavier option, which at 9.9 hp may not go to plane with two passengers, but will provide excellent stability when fishing in plumb.
Below is a comparative table of specifications of popular models for an outboard motor 9.9 hp:
| Model | Length, m | Width, m. | Body weight, kg | Passenger capacity |
|---|---|---|---|---|
| Kazanka-M | 4.06 | 1.45 | 145 | 3-4 people. |
| voronezh | 3.70 | 1.40 | 95 | 2-3 people. |
| Krym-M | 4.15 | 1.55 | 190 | 3-4 people. |
| Ob-M | 3.95 | 1.40 | 125 | 3 people. |
When you choose between these models, consider not only the specifications, but also the availability of spare parts. On Kazanka and Obi, parts are the easiest to find. aluminum-boat old releases may not have factory runduks, which will require independent equipment for storage gear.
Secrets of speed
How to increase the speed of the old boat?:Installation of hydrofoil on the lower unit engine can improve the plane and stabilize the course, especially on heavy boats of the "Crimea" type for an outboard motor 9.9 hp This is a cheap way of tuning.
Calculation of load capacity and passenger capacity
One of the most common questions is how many people and cargo can be taken on board? The formula is simple, but it has its nuances. The 9.9 hp engine creates a traction force sufficient to plane about 200-250 kg of total weight (boat + engine + people + cargo). If you subtract the weight of the boat (for example, 140 kg) and the weight of the engine with the tank (35 kg), then the payload remains about 100-120 kg.
This means that comfortable operation is possible for two-man A third passenger will put the boat into displacement mode, where the speed will drop to 10-12 km / h, and fuel consumption will increase. For family walks, this is acceptable, but for quick delivery to the point - not.
- 🚣 Displacement regime: The boat is floating, pushing the water, the speed is low, fuel consumption is minimal.
- 🚀 Gleaming mode: The boat slides on the surface of the water, the speed is high (25-35 km / h), sufficient engine power is required.
- ⚖️ Otheriation: correct distribution of cargo along the length of the boat for access to plane.
⚠️ Attention: Don’t place all the cargo and passengers in the bow of the boat, which can lead to burrowing of the nose in the wave and flooding the cockpit with water, which is dangerous even on a calm surface.
If you plan to fish with a lot of equipment, it makes sense to consider installing a 9.9 hp engine on a lighter boat or to accept moving in displacement mode. passport capacity This is the limit at which the boat will not sink, not an indicator of comfortable operation.
Operation and maintenance in season
Aluminum is a non-pretentious material, but it requires proper care, especially in areas of contact with water and fasteners. Aluminum-steel (trans mounting bolts) or aluminum-brass (motor diewood) galvanic pairs in salty or even fresh water can cause ailments. electrochemicalSo once a season, be sure to check the condition of the anodic protection on the motor and the integrity of the paint on the boat.
When storing the boat, it is better to keep it upside down or on a special trailer/steppe to prevent water from accumulating inside the hull. Even a small amount of water remaining at the bottom during the winter can lead to structural collapse. The 9.9 hp engine also requires conservation: changing the oil in the gearbox, processing candles and stabilizing the fuel.
☑️ Seasonal boat preparation
The first 10 hours of the motor are not recommended to give full gas. For an aluminum boat, this is especially important, since going to the plane on an unrun engine can create excessive vibration, which will negatively affect the rivet seams of the hull.
Tuning and modernization for comfort
Owning a 9.9 hp boat opens up a lot of tuning options, and because the speed is not extreme, you can focus on comfort. windshield (windshield) greatly improves the conditions of stay in the boat in windy weather. Aluminum frames for awnings are easily made independently from pipes.
Also popular is the installation of rundooks and soft seats, many older models have to sit on a hard aluminum bottom, which tires the back, using plywood covered with carpet to organize the floor and seating — a classic technique that turns the “iron” into a cozy boat.
The main conclusion: Aluminum outboard motor 9.9 hp - is a versatile, maintainable and affordable option for fishing and recreation, not requiring management rights and complex maintenance.
And we also need to keep navigation in mind, because if you put a sonar and a GPS on a boat like this, it's a must for serious fishing, and if you have a 9.9 hp engine, you have less vibration than you would on high-powered models, which extends the life of electronics, and you can make it universal, so you can take the instruments off quickly when you're transporting them.
FAQ: Frequently asked questions
Do I need a license to drive a 9.9 hp boat?
According to the current legislation of the Russian Federation, if the engine power does not exceed 10 hp (8 kW), and the weight of the equipped vessel is less than 200 kg, registration with the GIMS and rights are not required.
Which screw is better to choose for a heavy boat?
For heavy aluminum boats (such as the "Crimea" or loaded "Kazanka") for an outboard motor 9.9 hp, it is recommended to use a screw with a reduced pitch. Standard step may not allow the engine to gain working speed, which leads to overheating. Optimally experiment with propellers that have a step of 1-2 inches less than the standard.
Is it possible to use a boat in winter?
Aluminum retains its properties at low temperatures, but rubber seals and plastic can become brittle. Operation is possible, but requires caution. The main thing is to prevent water from freezing in the engine's lower unit, otherwise the gearbox may burst.
What speed does this bundle develop?
The average speed on planing for the "aluminum boat + 9.9 hp" bundle is 25-32 km / h with one driver. When fully loaded (3 people), the speed drops to 15-20 km / h, or the boat goes into displacement mode at a speed of about 10-12 km / h.