Operating a outboard motor at high speeds and maneuvers requires fine-tuning the tilt of a lower unit. Many boat owners face the problem of inefficient use of engine power due to the wrong position of the screw relative to the water. hydraulicIt allows you to instantly change the clearance of the engine on the go.
Unlike simple transom plates, which only correct the differentiation of the hull, elevators work directly with the engine, which gives a huge advantage in the ability to get on plane even when the boat is fully loaded. Hydraulic system takes on huge loads, ensuring smoothness of the course and protection of the transom from vibrations.
Choosing the right system can be a challenge for a beginner, as the market offers many modifications from different manufacturers. You need to consider not only the power of your motor, but also the design of the transom, as well as the desired functionality. In this article, we will discuss in detail the device of such mechanisms, their advantages and nuances of installation.
The principle of operation and the structure of the lifting system
The basis of any lifting mechanism is hydraulic cylinderIt's a piston inside the cylinder that is pushed or pulled by the pump, changing the angle of the motor, and it's a closed circuit where the oil acts as a working body that transmits the force.
The most important element of the design is pump-station The current model is equipped with electric pumps, which operate from the onboard network of 12 volts, and is controlled through a button on the tiller or a remote unit, which allows the operator to change the angle of attack without taking his hands off the control.
⚠️ Warning: Never force the motor to be lowered or lifted manually if the system is under pressure, which can cause seals to rupture and injury.
In addition, the design is necessarily present. return-valveThese are the ones that lock the piston position and keep the motor from falling spontaneously under its own weight or the oncoming flow of water, and the reliability of these elements directly affects the safety of the vessel.
What happens if there is air in the system?
The presence of air in the hydraulic system (suffocation) causes the rod to run softly, and the motor can snatch down or slide slowly down under load because air, unlike liquid, is compressed, requiring a mandatory pumping procedure.
Advantages of using a hydraulic jack plate
Installation hydraulic-lift It's a fundamental change in the behavior of the vessel on the water, especially in acceleration dynamics, and the ability to lift the lower unit when it's plane reduces water resistance and allows you to gain speed faster, while saving fuel.
The second important aspect is universality. angle-of-inclinationYou can adapt the boat to a variety of conditions, whether it's calm water, high wave or counter-current, and this is especially true for heavy aluminum boats and hard-bottom PVC keel boats.
- 🚀 Improved acceleration dynamics and shortened path to plane.
- ⛵ The ability to fine-tune the different for maximum speed.
- 🛡️ Protection of the transom from shock loads and vibrations at high speeds.
- 🔧 Maintenance: Easy access to the lower unit and screw in the parking lot.
It is also worth noting that the presence of an elevator prolongs the life of lower unit, as it excludes the operation of the engine in suboptimal corners, when water is poorly supplied to the water intake of the cooling system. Temperature monitoring It becomes easier and the risk of overheating decreases.
When moving against a strong wave, lower the nose of the motor slightly, which will help to cut the wave with a lower unit, soften the impact on the water and improve the course stability of the boat.
Comparison: Elevator vs. transax plates
Often, boaters have a dilemma: whether to lift the engine or install transom plates? Both solutions are aimed at improving driving performance, but work differently. transom plates They act on the aft part of the body, raising or lowering it, while the elevator changes the position of the source of traction itself.
Elevators are considered to be a more efficient solution for high-powered engines (40 hp and above), where the weight of the lower unit is significant, and plates are better at correcting the different on already planing light vessels, but they can be combined to achieve the ideal result.
| Characterization | hydraulic jack plate | transom plates |
|---|---|---|
| Object of impact | outboard motor | Aft part of the shell |
| The effect at launch | High (quick exit) | Medium. |
| Difficulty of installation | High (requires transom drilling) | Medium (trans-mounting) |
| Cost | Higher. | Below. |
If you want to get the most out of the engine and you're ready for a difficult installation, you can choose the elevator. If the boat is light and you only need a little adjustment, the stoves can be a more economical option.
Criteria for the selection of hydraulic system
When buying equipment, you should pay attention to compatibility with your engine. Load capacity The elevator should match the weight of your engine's lower unit, and using a weak system on a powerful engine will cause the seals and pump to fail quickly.
And you can see the material that's being manufactured. stainless steel It's a high-corrosion anodized aluminum, and salt water is merciless to metal, so saving on corrosion protection can be expensive.
The standard models offer a stroke of 4-6 inches, but for specific tasks, you may need elongated options. Make sure that the set you choose fits your transom configuration (height and width).
⚠️ Note: When buying, pay attention to the presence of an expansion tank for oil in the kit. its absence can lead to suffocation of the system with temperature changes.
Equally important is the brand and availability of spare parts, and remixes for popular brands are easier to find than for lesser-known Chinese counterparts. Durability The system often depends on the quality of rubber seals.
Step-by-step instructions for installing an elevator
Installation of a hydraulic lift requires precision and adherence to technology. The first step is always to dismantle the motor and prepare the transom, and mark the drilling points according to the template that comes with the kit.
The holes should be drilled carefully using metal drills of the appropriate diameter. It is important not to damage the internal bulkheads of the transom if the boat is metal or plywood. corrosion-proof and sealed.
☑️ Installation tools
The cylinder and brackets are installed using stainless steel bolts, hydraulic hoses are laid so as to prevent them from being rubbed or bent when the engine is moving.
After mechanical assembly, the electrical part is connected, and the wires from the pump are output to the battery through the fuse. Leakability of compounds A key factor in the reliability of electrical equipment on water.
Connection scheme (example):Battery (+) -> Safety (30A) -> Control button -> Pump
Battery (-) -> Engine/hull mass
Service and troubleshooting
The hydraulic system does not require complex maintenance, but regular monitoring of its condition is necessary. Periodically check the oil level and the absence of leakage on the joints of the hoses. fluid leakage It signals a problem with seals.
Once a season, it is recommended to lubricate the hinge joints and rods with a special lubricant that is resistant to washing out with water, which will prevent the movable parts from acidifying and prolong the life of the mechanism.
- 🔍 Visual inspection of hoses for cracks and scuffs.
- 💧 Check the level and condition of the hydraulic fluid.
- 🔩 Control of tightening of fasteners and nuts.
- 🧼 Cleaning the mechanism of salt and dirt after operation at sea.
If the motor has started to "swim" or lower under load, most likely, a replacement of the piston cuff or pumping of the system is required. Using the wrong oil (e.g. DOT brake fluid) in systems designed for hydraulic oil will cause the rubber bands to swell and break.
Timely replacement of seals is much cheaper than repairing or replacing the entire hydraulic cylinder. Don't ignore the first signs of leakage.
⚠️ Note: When replacing hydraulic oil, use only the brands recommended by the elevator manufacturer.
Frequently Asked Questions (FAQ)
Can I install a hydraulic jack plate by myself?
Yes, if you have power tools and a basic understanding of the boat, but if you are in doubt, it is best to consult a specialist, as errors in drilling the transom can lead to a leakproof hull.
How often should the oil be changed in the system?
Manufacturers recommend changing the hydraulic fluid every 3-5 years or when there are signs of contamination / loss of properties. In conditions of intensive operation in salt water, it is better to reduce the interval to 2-3 years.
Is the elevator suitable for an electric start motor?
hydraulic jack plates are compatible with any start-up system, as long as the engine power is within the range stated by the lift manufacturer (usually up to 250-300 hp for standard models).
What to do if the elevator stops holding the engine?
The problem is probably the throughpass valves or the worn-out piston cuffs, you need to remove the cylinder, make a defect, and replace the remix, and check if the air has entered the system.