Transporting a outboard motor is a phase of water technology that is often underestimated until it comes to its consequences. Many inflatable boat owners believe it is enough to simply remove the engine from the transom and put it in the trunk of a car. However, four-stroke powertrains are much more complex than their two-stroke counterparts and require strict adherence to the rules when moving. Incorrect position during transportation can lead to serious and costly breakdowns that will manifest themselves on the first start on the water.
The main problem is the crankcase design and the lubrication system, unlike two-strokes, where oil is mixed with gasoline, in four-stroke engines. oil-case And if you put a motor on the side or upside down, gravity will cause the oil to flow into the cylinder-piston group or exhaust system, and it can cause a hydraulic shock when you try to start or jam the engine, so understanding the physics of the processes inside your motor is key to its long life.
In this article, we will discuss all the nuances of preparation, positioning and fixing the engine. You will learn why some models can still be transported on the side, how to properly preserve the engine before a long parking lot, and what mistakes 90% of water engines make. A competent approach to the logistics of your equipment will save you not only money for repairs, but also nerves in the middle of the fishing season.
Features of the design of four-stroke engines
To understand why there are strict transportation restrictions, we need to consider briefly the internal structure of the engine: a four-stroke internal combustion engine has a closed lubrication system. The oil is in a pallet (case) and circulates through the channels due to an oil pump or splashing.GBCs) a gas distribution mechanism is located with valves which also require lubrication but must not be completely oiled.
When the motor is running, the oil is where it's supposed to be, but if you change the angle of the engine to more than the permissible limits, the liquid, under the influence of gravity, rushes to the lowest point relative to the new position. combustion-chamber Or an intake manifold, the next time the piston starts, it will try to squeeze an incompressible liquid, a phenomenon called a hydraulic shock, and it often causes the rod to break or the valves to deform.
In addition, four-strokes often use a sapoon, the crankcase ventilation system, which can be heavily tilted through the sapoon, and can release oil into the intake system, which not only pollutes the engine, but also changes the composition of the fuel mixture, leading to unstable operation and the formation of soak. Yamaha, Honda, Tohatsu The system has improved, but the risk remains relevant for most engines.
⚠️ Attention: Never leave a four-stroke engine on its side longer than a short-term reposition requires, and even 15-20 minutes in the wrong position can be critical for some models without special valves.
It is also important to consider the presence gearboxIn the lower gearbox, there's transmission oil, and when transported upside down, it can leak out through the glands if they're not perfectly sealed, or it can go to places where it shouldn't be, and although losing gearbox oil is less fatal to the engine than engine problems, it will require a mandatory lubrication change before going to water.
In what position can the motor be transported?
There are three basic provisions for transportation: vertical, horizontal (on a certain side) and inverted. For four-stroke motors, the gold standard is exclusively the gold standard. verticalityIt's in this state that all the fluids are in their tanks, and the pressure in the systems is balanced, and standing is the safest, but often the most uncomfortable, option because of the size of the motor.
But manufacturers understand that it's impossible to put a powerful 15-strong car vertically into a passenger sedan, so engineers have come up with compromises: Some models allow transportation on the side, but only on a strictly defined side. Usually this is the side opposite to the location of the muffler and carburetor (or injector system).
- 🛑 Vertical position: Ideal for any four-stroke motor, eliminates the flow of oil and fuel.
- ⚖️ Horizontal (on the side): It is only allowed for models marked "Side transport allowed" and only on a certain side.
- 🙃 Inverted (upside down): It is strictly forbidden for four-strokes without complete preservation (dumping liquids).
If you own the engine Suzuki or MercuryYou should check the manual. Some modern engines are equipped with a system. Lean Angle Sensor Or special valves in the head of the unit, which allow you to put the motor on either side for a short time, but relying on this without checking documentation is a risk. Old models require only vertical transportation.
Instructions: how to put the motor on its side without damage
If vertical transportation is not possible, and the instructions to your Tohatsu or Yamaha If you can lay it on your side, you have to follow the algorithm, and if you break the sequence, you can get the oil to flow into the cylinders before you start moving, and it takes 5 to 10 minutes to prepare, but it saves you from major repairs.
The first thing you do is shut off the fuel supply. You disconnect the fuel hose from the engine and shut it down so that the gasoline doesn't leak. Then if the engine has a forced tilt system or a trim, you lift the lower unit. If the motor is removed from the boat, you put it on a flat, clean surface. It's important that the side you put the motor on is free of protruding parts that can take over the weight of the engine.
☑️ Checklist for engine laying
After installation, make sure that the engine is securely fixed and does not roll when braking the car. Use belts or stops. If you are driving the engine for a long distance (more than 100 km), it is strongly recommended that after arriving at the site, the engine be allowed to stand in an upright position for at least 30-60 minutes before starting.
⚠️ Attention: Never place the motor on the side of the exhaust pipe or the side where the carburetor/injector is located.
Preparation for long-term transportation and storage
So the situation is very different if you have to move the motor to the other hemisphere, send it by mail, or just put it in a garage for the winter in a confined space, and in these cases, the "vertical only" rule becomes impossible, and the risk of corrosion and oxidation of parts increases. conservation.
The first and most important step is to drain all the technical fluids, drain the engine oil from the crankcase and the transmission oil from the gearbox, and then extract the fuel from the carburetor float chamber (for carburetor engines), and start the engine and let it run, shutting off the gas tap until it dies.
Then you have to treat the internal cavities of the engine with a preservative. Through the candle hole, a special preservative oil or ordinary engine oil is injected into the cylinder, and then you make a few turns of the crankshaft with a starter (with twisted candles) so that the oil film covers the walls of the cylinder and piston rings. Candle holes are closed, and the motor itself is packaged in a sealed bag or film to exclude moisture.
Should I remove candles when conserving?
Yes, if you keep the candles for a long time, it's better to twist, wipe and store them separately in a dry place, or screw them back in, but not plug the caps in, and this will prevent the electrodes from corrosion and the insulator from breaking down from dampness.
After these procedures, the four-stroke motor can be transported in any position, even upside down, but remember that before the first start after storage, you will have to undergo a complete reconstitution procedure: pour fresh oils, screw candles, check the fuel system, neglecting this step is equivalent to starting the engine "dry".
Common Mistakes in Transportation of outboard motors
Experienced water engineers have seen many cases where the desire to save time or space has been depressing. Analysis of service centers shows that most transportation-related breakdowns are due to trivial inattention or false beliefs, and let's take a look at the most common ones so you don't get into the statistics.
One of the biggest mistakes is to try to lock the engine just behind the handle of the gas or the humming wheel. When you brake or turn a car abruptly, the inertia of a heavy engine (especially 15-30 hp and above) puts a huge strain on the mounting points. The tiller is not a handle for carrying weights, but a control lever. It can crack or deform, and in the worst case, the engine will break and damage the cabin or body of the car.
Another common mistake is ignoring the protection of the lower unit, where the motor leg often dangles when transported on the side or vertically in the back, and if you don't fix the gearbox pen, the vibrations of the road can damage the anti-cavitation plate or even cause microcracks in the gearbox body. Always use stops or pads.
| Mistake. | Consequence | How to avoid |
|---|---|---|
| Transportation on the "wrong" side | Oil hitting the cylinder, hydraulic shock | Look at the markings on the body, read the manual |
| Leave the tank full | Stretching hoses, risk of ignition of vapors | Produce fuel or drain into a canister |
| Fixing behind a tiller | Broken handle, engine failure. | Set belts for lower unit or body |
| Lack of gaskets | Scratches, chipped paint, corrosion | Use thick cardboard, rugs, rags |
Use old car mats or dense corrugated board to apply for an outboard motor, which will not only protect the paint coating, but also prevent the metal from slipping on the metal when vibrating.
Fixing and safety on the way
A properly laid but poorly secured motor is a projectile in the back of your car. Even a small weight of 30-40 kg in an accident or emergency braking increases its mass by a factor of ten, and reliable fixation is not only a matter of safety of equipment, but also of your safety and the safety of other road users.
For fastening, it is best to use textile belts with a ratchet mechanism or screed belts with carabiners. Chains are not recommended, as they can damage the engine body. The belts must pass through reliable points: lower unit (foot), suspension bracket (transhove plate). It is strictly forbidden to pass belts through plastic engine casingsThey're under tension.
If the motor is vertical in a kunga or trailer, it should be fixed on all sides to prevent rocking, you can use wooden bars as struts between the engine and the body wall, and it is also worth checking whether the fuel faucet is closed and the hose is reliably shut down so that the gasoline vapors do not fill the enclosed space.
⚠️ Attention: Before starting the movement, be sure to check the tension of the belts after 10-15 km. the vibration could weaken the fastener, and the motor will begin to shift.
The basic principle of safety: the engine should become one with the body of the car, there should be no backlashes, beats and movements.
FAQ: Frequently asked questions
Can I drive a four-stroke engine upside down if I drain the oil?
Yes, if the crankcase and gearbox oil is completely drained and the fuel system is mothballed, the motor can be carried in any position, but it is a time-consuming process that requires further refilling with new liquids, and for a short trip, it is easier to find a way to carry it vertically or on the permitted side.
How long can the motor stay on its side without consequences?
Manufacturers do not usually regulate the exact time, but recommend minimizing it. Short stacking (5-10 minutes) for loading is usually safe for modern engines. Prolonged parking on the side (hours and days) is not allowed without pre-canning, since oil slowly but penetrates through the rings into the cylinder.
What if I don’t drive the engine properly and it smokes?
Most likely, the oil got into the combustion chamber. Let the engine run at idle speed for a while. White or blue smoke should stop when the oil burns out. If the smoke does not pass, there are knocks or power drops, immediately turn off the engine and call the service, there may be a hydraulic shock.
Do I need to disconnect the rummel during transportation?
Not necessarily, if it is securely fixed and does not interfere with the dimensions, but for compact stacking and avoid accidental fractures of the turning mechanism, the romple is better removed or fixed in a position parallel to the lower unit, if the design allows.
Are Gasoline Vapors Dangerous in a Closed Track?
Yes, it's dangerous. Gasoline vapors are heavier than air and explosive. Always shut off the fuel supply faucet, disconnect the hose and close the tank tightly, and it's best to transport the fuel tank separately from the engine in a well-ventilated place or airtight tank.