Buying a motor oven is often not just a desire to save money, but a need to create a compact, lightweight and reliable spare propulsion for your boat. tuning-boatThe market offers many options, from factory kits to homemade designs, but finding a quality option without an integrated engine that can be adapted to your needs can be difficult.
In this article we will discuss what is motor-oilYou'll learn how to choose the right trans shaft and trans shaft to ensure that your boat reaches its maximum speed with minimal fuel consumption. mobility and ease of service.
The main advantage of these systems is that they're versatile, and you can use the same powertrain on different boats just by changing the attachments. repair These designs are often easier and cheaper than maintenance of complex outboard motors, so let's figure out how to choose the best option for your tasks.
⚠️ Attention: When installing a homemade or redesigned motor oven, make sure that your boat’s thrashboard will withstand the vibration and weight of the structure, otherwise PVC tubes may be damaged.
What is a motorbike and why it is needed
The motor oar, or as it is often called popularly, "motor pusher," is a simplified version of the outboard motor. combustion-engine (often from a chainsaw or motorized block) connected to a propeller through a shaft and gearbox, the main purpose of such a device is to ensure the autonomous movement of small-sized boats where the use of powerful motors is excessive or prohibited.
The key element here is squirtIt's the one that holds the whole structure and allows you to adjust the depth of the propeller, and unlike factory engines, motor oars often don't have a full-fledged lower unit, and the shaft can be open or protected by a casing, which makes them vulnerable to algae, but makes it much easier. maintenance.
There are several scenarios where the motor oar is justified: first, fishing in shallow water where the noise of a large motor will scare the fish away; second, it is a safety option: if the main motor stalls in the middle of the reservoir, a light chain sawmill will help you get to the shore; third, it is an economic factor: you can build such a unit from available spare parts.
- 🚤 Compactness: The motor oar is easily disassembled and placed in a backpack along with the boat.
- ⛽ Economics: Fuel consumption of two-stroke engines of low power is minimal.
- 🔧 Repairability: Most of the nodes can be repaired in the field.
When choosing an engine for a motor oar, give preference to models with centrifugal clutch - this will allow you to start the engine at idle speeds without rotating the screw.
Where to buy a motorbike: an overview of options
The question of where to buy has several answers, depending on what you are looking for: finished product or components for assembly. Finished industrial motor ovens are rare and expensive, because it is a niche product. set-up Or individual nodes.
The first option is specialized boating stores, where you can find ready-made solutions from Russian manufacturers that have already been tested, such products usually have a certificate and warranty, which is important for safety, but the range can be limited and prices are high due to low production volumes.
The second option is the bulletin boards and the forums, where enthusiasts sell both ready-made and used kits. lower unit The third way is to buy everything separately: the engine, the shaft, the propeller and assemble it yourself, which requires technical skills.
When buying, pay attention to the material of the shaft. Stainless steel is preferable, since ordinary ferrous metal corrodes quickly in salt water. Also critical is the type of engine attachment to the lower unit: it must be rigid and vibration resistant.
Technical specifications: what to look at
When you choose a motor oar, you can't just rely on the power of the engine. It's important to have the consistency of all the nodes. If the engine is too powerful for the rotor you're going to get cavitation and low efficiency. If the engine is weak, the boat won't go planing. The optimal ratio is where the engine develops 3-5 hp.
Pay special attention to gear ratio. It's usually higher for motor-gauges than for larger motors, because chainsaw engines run at high revs. screw for such systems has a diameter of 180-220 mm and a step corresponding to the traction specifications.
| Parameter | Optimal value | Impact on the move |
|---|---|---|
| Engine power | 1.5 - 4.0 hp | Determines the maximum speed |
| The length of lower unit | 350 - 500 mm | Affects the sinking of the screw |
| Weight of kit | 8 - 12 kg | Carrying convenience and boat balance |
| Type of fuel | AI-92 + butter | Availability and cost of operation |
⚠️ Attention: Do not use propellers with increments of more than 4 inches on engines with a power of less than 3 hp - this will lead to overheating and rapid wear of the piston group.
Why is the daydate important?
A deadwater is a pipe that spins a propeller shaft, and in high-quality paddles inside the paddle, there are bearings and ossicles that protect the shaft from water, and if the diewater is made from a normal pipe without seals, the water will quickly wash the lubricant and the shaft will jam.
Assembly and installation of motor ovens DIY
If you're going to build a motor oven yourself, you're going to need precision and a toolbox, and the process starts with the preparation of a transom plate, which is made of moisture-resistant plywood or aluminum, and is going to be securely attached to the cylinders or the hull of the boat.
The next step is to dock the engine and the shaft, and it's important to center the connection perfectly to avoid beats. The engine locks often use adapters that you can order from the turner or find on sale as a turner. motor-block adaptersThe shaft must be strictly on the axis of lower unit.
☑️ Motor oar assembly
After assembly, you need to perform static tests, check the cooling system (if it is water) or make sure that there is enough air blowing (if it is air). exhaust They are removed from the operator to avoid poisoning.
Comparison: motor oar vs electric motor
Often, a water motor has a choice between a gasoline engine or an electric traction engine, both of which have the right to live, but serve different purposes, gasoline gives you independence from the outlet and longer range, whereas electricity is quiet and environmentally friendly.
Electric motors are easier to operate: no mixing of fuel, no smell of gasoline, instant start. battery It's a very dischargeable vehicle, and it can weigh about the same as a gasoline tank and an engine combined, and you can refuel it at any time.
In terms of cost of ownership, motor oars benefit in the long run if you consider replacing batteries, but if you fish in closed waters where gasoline is prohibited, there is no choice. petrol-pack He is the king of autonomy.
- 🔋 Autonomy: Gas allows you to travel up to 50 km at a single gas station.
- 🔇 Noise: Electric motors work silently, motor oars require a silencer.
- ❄️ Winter: It is more difficult to run gasoline engines in the cold without preparation.
For fishing in overgrown shallow waters and in protected areas, choose an electric motor, for long-distance expeditions and fishing with sonar (where weight is important) - a motor oar.
Frequently Asked Questions (FAQ)
Can I use a motor oar on a boat with a rigid body?
Yes, you can, but you'll need to make a special bracket or transition plate, because standard mounts of motovoyers are often designed for the soft transom of inflatable boats, and it's important to ensure that the mounting is rigid so that vibration does not pass to the hull.
Which screw is better to choose for a motor oven?
The best choice is three-blade aluminum alloy screws in 3-4 inches, which provide the best balance between thrust and speed. For heavy boats, four-blade options can be considered.
Do I need to register a motorbike in GIMS?
Under current regulations, boats with an engine of more than 8 kW (about 10.8 hp) are subject to registration. Since motor oars usually have a power of up to 4-5 hp, they do not require registration if the mass of the curb vessel does not exceed 200 kg.
How to extend the life of a homemade motor oar?
Lubricate the shaft bearings regularly, wash the system from the sand after each trip and use a quality two-stroke oil. It is also important to check the tightening of the engine mounting bolts after the first hours of operation.