Operating an inflatable or metal floater with a 50 horsepower outboard motor requires not only the owner's management skills, but also competent technical equipment. hydro-liftFor the popular motor lineup Tohatsu This node becomes critically important, as it allows you to quickly change the position of the lower unit relative to the transom.
Owners often underestimate the importance of properly installing this mechanism, relying on standard mounts. However, it is high-quality hydraulic lift ensures optimal operation of the propeller, protects lower unit from impacts on underwater obstacles and significantly facilitates the removal of the boat to planing. In this article, we will discuss in detail all aspects of the selection, installation and operation of the lifting system for the 50-horsepower models of the Japanese brand.
You have to understand that the market offers many options, and the choice of a particular model depends on the type of boat and operating conditions. A properly selected unit prolongs the life of the engine and reduces fuel consumption by optimizing the angle of attack of the propeller.
Why do you need a hydraulic lift on a 50-horsepower engine?
The main function of the hydraulic lift is to be able to remotely or mechanically change the inclination angle of a lower unit. For a 50 hp motor, which is often mounted on relatively lightweight PVC boats or small boats, this gives a huge advantage. trimYou can compensate for the boat’s different caused by cargo distribution or excitement on the water.
It also provides a reliable protection system, where when stranded or underwater, the hydraulic lift allows you to instantly lift the propeller, avoiding costly lower unit repairs, especially for shallow rivers and fishing in overgrown waters, where the risk of encountering snags is high.
It is worth noting the impact on driving performance. Properly exposed angle of inclination of the engine allows the boat to get on plane faster mode, which saves engine life and reduces the consumption of combustible mixture.
⚠️ Attention: Using a motor without a proper lifting mechanism at speeds above 40 km / h can lead to "rolling" (porosing), which reduces handling and increases the risk of rollover.
Types of Hydro-Lifting Mechanisms for Tohatsu
In the market of accessories for water-motor equipment, you can find two main types of lifting systems compatible with 50-horsepower models. TohatsuThe first type is this. hydraulic These are systems that operate by the pressure of the liquid in the cylinder, which ensure smooth running and can hold heavy motors in any intermediate position without effort on the part of the user.
The second type is mechanical or electrical variants, which often come bundled with more powerful engines, but can be adapted for 50 hp. Mechanical systems are easier to maintain, but require physical effort or a separate electric drive to change the angle.
The choice between them depends on the budget and frequency of use of the boat. For professional fishing or frequent walks, hydraulics are preferred because of their durability and convenience.
- 🚤 Hydraulic models: provide maximum comfort and smoothness of inclination angle adjustment.
- ⚙️ Mechanical systems: are characterized by simplicity of design and no risk of fluid leakage.
- ⚡ Electrical actuators: allow you to control the trim with a single button from the remote control.
- 🛡️ Combined variants: combine a hydraulic damper and a mechanical fixator.
Hidden features of hydraulics
Hydraulic systems use a special oil with low viscosity, which retains its properties at low temperatures, which is important for the northern regions.
Compatible with Tohatsu MFS50 and M50B models
When selecting a hydraulic lift, it is critical to consider the specific modification of your motor. Tohatsu It includes two-stroke models of the series. M50Band four-stroke MFS50Despite the similar power, the geometry of the fastening of the lower unit and the corner hub may differ.
Four-stroke engines are generally heavier and have different bracket attachments. Installing an inappropriate hydraulic lift can cause the engine to skew, causing vibration and accelerated wear of the lower unit. Always check the labeling on the accessory package.
Also worth noting is the year of the engine. Tohatsu have occurred several times, and older brackets may not fit newer versions of lift cylinders without transition plates.
Before buying, be sure to measure the distance between the fastening holes on your engine’s lower unit and compare it to the specifications of the hydraulic lift.
Instructions for installation of hydraulic lift
The installation process requires precision and a basic set of tools. Before starting work, the motor must be securely fixed and the boat mounted on a flat surface or slipway. The first step is always to dismantle the old thrust crane or control cables if they interfere with access to the mounting assembly.
Then there's the brackets, and it's important to only use the bolts and nuts that come with the hydraulic lift, because they have the appropriate strength class, and the normal fastener can't withstand the vibrational loads.
☑️ Checklist before installation
Once the main elements are fixed, the hydraulic hoses or electrical wires are connected, and it is important to keep the connections polar and tight, and any error at this point can lead to a system failure at the most inopportune moment.
The final step is to pump the system (for hydraulics) and check the course. The motor should go up and down without jerking or jamming. If you feel resistance, check the alignment of all the elements.
Bolt tightening sequence:1. Preliminary puff by hand.
2. Puff cross-cross to 50% effort.
Final dynamometer key tightening (moment 25-30 Nm).
Adjustment and adjustment of the inclination angle
The right hydraulic tuning is the art of balancing speed and handling. Tohatsu 50 The optimal position is considered when the anti-cavitation plate is parallel to the bottom of the boat when moving, this ensures maximum efficiency of the propeller's stop.
If the boat's nose is too uptight, the speed drops and the fuel consumption increases; if the nose is too down, the boat starts digging water, losing momentum, and adjusting by changing the length of the hydraulic cylinder rod or the position of the thrust pins.
It is recommended to conduct test swims after each adjustment, recording changes in the behavior of the vessel. Small changes in the angle can dramatically change the experience of control.
| Parameter | Normal value. | Permissible deviation | Impact on the move |
|---|---|---|---|
| Trim angle | 3-5 degrees. | +/- 2 degrees | Optimal glossing |
| System pressure. | Worker (manometer) | Not below 80 percent. | Stability of the lift |
| Stock's move | Smooth, full. | No jerks. | Absence of vibration |
| Clearance in anchorages | 0 mm (backlash excluded) | Minimum | Accuracy of management |
⚠️ Warning: Never try to adjust a hydraulic pressure valve without a pressure gauge - this can cause hoses to rupture or damage to the coils.
The ideal setting is achieved when the boat goes smoothly, without burrowing its nose and not lifting it excessively, even when fully loaded.
Maintenance and troubleshooting
The hydraulic lift, like any machine, requires regular attention. The main enemy of hydraulics is water and dirt, which can get through damaged glands, so after each operation in salt water, the knot must be washed with fresh water.
Periodically check the level of liquid in the tank (if the design provides such a possibility) and the condition of the rod for corrosion. The appearance of rust on the rod will quickly disable the cylinder cuffs.
If you notice that the motor spontaneously descends or stops holding the angle, most likely the problem is the bypass valve or the wear of the seals, in which case you need to bulkhead or replace the rim.
- 🔧 Regular lubrication of hinge joints will prevent creaking and jamming.
- 💧 Fresh water washing is mandatory after each outing.
- 👀 Visual inspection of hoses for cracks and scuffs.
- 🛠️ Check the tightening of the fasteners every 50 hours.
Frequently Asked Questions (FAQ)
Can I install a hydraulic lift on the old Tohatsu 50 by myself?
Yes, this is possible if you have basic tool skills and an understanding of the outboard motor, but for the first installation, it is recommended to involve an experienced mechanic to avoid errors in the setting.
How often should you change the oil in the hydraulic lift?
In most modern systems, oil changes rarely, usually during repairs or once every 3-5 seasons of active use, but the level and condition of the fluid should be checked annually before starting navigation.
Why doesn't the engine go up to the end?
There are several reasons: low fluid levels, suffocation of the system, a malfunction of the pump or a mechanical obstacle, and it is also worth checking the settings of the lift limiters.
Is the Tohatsu 50 hydraulic lift compatible with a 40 hp engine?
Often the mounting dimensions of engines of the same series (for example, M40 and M50) are identical, but the load capacity of the cylinder may differ.
What to do if the hydraulic lift leaks?
You can't operate the current assembly. You have to shut down the holes, remove the cylinder, and replace the sealing rings. It's dangerous to use a motor with malfunctioning hydraulics.