Transporting a outboard motor assembled with a boat is a standard practice for many water-engines, saving time on descent and ascent. trailer-holding Vibration and wind load can damage the lower unit or even lose expensive equipment on the go.
The main problem is that the standard trans clamp is not designed for the long loads that occur when driving on the highway at high speed. lower unit, causing backlash in gearshift mechanisms and bearings, which significantly reduces the resource of the unit.
In this article, we will discuss proven fixation methods that will help you avoid costly repairs and ensure peace of mind while traveling to a body of water.
Risks of improper fixation during transportation
Ignoring the issue of reliable fixation can lead to disastrous results. Vibration arising from the road surface is transmitted through the frame of the trailer to the transom of the boat and, accordingly, to the transom of the boat. suspensionConstant shaking destroys internal mechanisms, especially the system suffers. gearshift And sealing gums.
In addition, an improperly fastened motor creates a pendulum effect, and when braking or turning sharply, the inertia of heavy lower unit can deform the transom of the boat or even cause the fastening elements to break, posing a real threat to other road users.
Here are the main consequences of negligent attitude to fasteners:
- 🔧 Premature wear of gears of gears of gears of gears of gears of gears of gears of the bearings due to constant vibration.
- 💧 Depressurization of lower unit and moisture entering the oil, which leads to corrosion.
- 🚛 Risk of losing the motor on the road and creating an emergency.
- 💥 Damage to the transom of the boat due to excessive pressure of the clamping screws.
⚠️ Warning: Never rely only on regular engine clamps when driving at speeds above 40-50 km / h. They are designed to keep the engine afloat or when driving a boat, but not for road shaking.
Choosing the type of fastening: brackets and adapters
For safe transportation, there are specialized solutions that rigidly fix the position of the motor relative to the transom. pendant, which connects the lower unit to the trailer frame or the transom of the boat.
There are universal mounting models that are suitable for most PVC boats and aluminum boats, and they are often metal barbells with adjustable grips. quick-releaseIt allows you to install or remove the motor in seconds without using tools.
When choosing equipment, pay attention to the material of manufacture. Stainless steel or aluminum with a quality powder coating is the best choice, since they are resistant to corrosion. Plastic elements are only allowed in places that do not carry the main load.
Instructions for installing the motor on the transom
The first step is always to get the motor on the transom right, and even the best extra mounting won't help if the motor itself is hanging on the transom. boat-engine.
Clamp screws should be tightened with the force recommended in the manual. Insufficient puff will cause the motor to slide, and excessive puffing can damage the transom, especially if it is made of plywood or composite. Use a dynamometer key if possible, or rely on proven puffing experience.
To fix the position, use the following algorithm of actions:
- 🛠️ Weaken the clamping screws and set the motor in the center of the transom.
- 🔩 Tighten the screws evenly, checking for no distortions.
- 🔌 Make sure the pump or remote control cable is not clamped.
- 🔍 Check the reliability of the fixation, trying to loosen the motor with your hand.
☑️ Pre-installing checks
After the initial installation, you need to check the position of the lower unit, it should be strictly vertical or with a slight inclination, if this is provided by the design of the boat to improve driving performance, but for transportation it is better to put it in a vertical position.
Installation of additional fixtures and brackets
When the motor is mounted on a transom, it is the turn of installation of the main fixing element, most often a bar is used, one end fastened to the lower unit (below the anti-cavitation plate), and the other to the frame of the trailer or a special stanchion on the transompane.
If you use a trailer frame mount, make sure that the contact points are protected by rubber pads. Metal against metal will quickly wear off when vibrating, and the connection will weaken. This is especially true for aluminum boats and motors, as it is possible. electrochemical when contacting dissimilar metals in salt water, although mechanical strength is more important during transportation.
⚠️ Attention: When drilling the trailer frame for installing stationary fasteners, be sure to treat the edges of the hole with an anti-corrosion composition to prevent the development of rust.
Some water-engineers prefer to take a lower unit and transport it separately in the trunk. This is the safest way for the motor, but it requires a talrep or a lock for the transom of the boat itself so that it doesn't hang around. If you choose this path, make sure that you have a talrep or a lock on the transom of the boat. sink-board It is reliably fixed in the transport position.
Do I need to remove the propeller?
You don't have to remove the propeller when you're transporting it if it's securely stalled. However, if you're planning a long trip on bad roads, removing the propeller will reduce the vibration and the risk of being damaged by flying rocks. Be sure to use a locking washer or nut so that the screw doesn't unwind on its own.
Protection from vibration and road loads
Vibration is the main enemy of technology in transportation. In addition to rigid fastenings, damping elements are recommended. Rubber inserts in the contact points of fastening clamps with lower unit significantly reduce the transmission of high-frequency oscillations.
Also worth paying attention to is the position of the lower unit. hydro-liftThe pressure in the system may drop slowly, or the hydraulic cylinder may leak, causing the engine to lower and hit the trailer. Always use a mechanical latch or a support.
The table below compares the various vibration protection methods:
| Protection method | Efficiency | Complexity of installation | Cost |
|---|---|---|---|
| Staff clamps | Low. | Minimum | 0 rub. |
| Additional bracket (bar) | High. | Medium | Medium |
| Eating lower unit | Maximum | High. | Low. |
| Rubber dampers | Medium | Low. | Low. |
Use screed belts with a ratchet mechanism to further fix the motor to the trailer frame, but do not drag them to avoid damaging the plastic casing.
Features of transportation on different types of trailers
The design of the trailer directly affects the choice of method of attachment. On trailers with a keel structure (where the boat lies with a keel on the tracks), the engine is often high and requires especially careful fixation from rocking.
For flatbed trailers, the PVC boats have a lower motor, the centre of gravity is shifted, so it's important not to overload the trailer's breath. A heavy motor on a long overhang can create a dangerous lever effect when braking.
If you own it. aluminum-boatA wide engine can be out of the trailer's dimensions, which requires the installation of position lights and signs, and in such cases, you often have to move the motor closer to the boron or use special elongated brackets.
Checklist before leaving for the track
Before you go on the road, you need to conduct a final inspection, walk around the trailer and check all the attachment points, make sure that all nuts and bolts are tightened, and the safety ropes (if used) are free of scuffling.
Check if the engine is touching any parts of the trailer when swaying, the gap should be sufficient to exclude contact even in severe shaking, pay special attention to the condition of the lower unit, it should not be cracked, which could widen in the way.
The list of actions before the start:
- 🚗 Check the tyre pressure of the trailer.
- 🔦 Checking the operation of lighting devices (dimensions, turns).
- 🔗 Final stretch of all fastening elements of the motor.
- 👀 Visual inspection for hanging cables or chains.
On the way, especially after the first 10-20 kilometers, it is recommended to stop and recheck the tightening of the mounts. Vibation at the beginning of the trip can weaken connections that seemed reliable in the parking lot. This simple procedure can save your engine from falling.
Frequently Asked Questions (FAQ)
Can the motor be transported horizontally?
It is strongly advised not to carry two-stroke motors horizontally or upside down without first draining the oil, which can result in oil entering the combustion chamber and hydraulic shock on first start. Four-stroke motors also require a vertical position to store oil in the crankcase.
Do I need to remove the battery from the engine?
Yes, it is better to remove the battery and transport it separately when charged, especially in winter, and this will eliminate the risk of short circuits when vibrating if the insulation is broken somewhere.
How often should the scalp be changed?
Visual inspection of bolts and nuts should be done before each season. If you notice corrosion marks, slimmed edges or thread stretching, the fastening elements should be replaced immediately. Stainless steel fasteners last longer, but also require inspection.
Is the wind dangerous when transporting the engine?
Yes, side winds can create significant sailing, especially if the engine is fitted with a housing, and strong bracket attachment is critical when driving on bridges and open sections of the track in windy weather.