The question of proper storage boat-engine Every owner of water machinery faces a dilemma in the off-season, often with the dilemma of taking a precious space in the garage, leaving the engine upright, or still putting it on its side to save space. Many newcomers believe that the tightness of modern units allows them to ignore the manufacturer's recommendations, but practice shows otherwise.
The short answer lies in the design. two-stroke and four-stroke While the former may sometimes be allowed to move horizontally under strict conditions, the latter may often be tantamount to a slow killing of the machinery. In this article, we will examine in detail the physicochemical processes that occur within the aggregate as it changes orientation in space.
You have to understand that even a short-term engine in the wrong position can lead to leakage of technical fluids, clogged channels and corrosion. Let's figure out which nodes are affected first and how to minimize the risks if you simply have no other option than to put the engine down.
Design features and the influence of gravity
Gravity is the main enemy of any machine left alone for a long time. In an upright position, all working fluids — whether it's oil in the gearbox, the fuel mixture in the crankcase or the lubricant in the cylinder — are where the engineers designed them. Horizontal position It violates that idyll.
The first thing that's going to happen is the lubrication system, and the oil drains down to the bottom of the ground, which normally needs to be dry or filled with air, and this causes critical components to be left without lubrication for the first few seconds of operation the next time they start, causing bullies.
It is also important to consider the design carburetor In an inverted or lateral position, fuel can flow freely into the combustion chamber, creating what's called hydraulic clogging, a phenomenon that is dangerous because the liquid doesn't shrink, and an attempt to start it can cause the rod or the piston to break.
⚠️ Warning: Never leave the motor lying on its side immediately after use. Hot oil has less viscosity and will penetrate the cavities faster, and cooling in this position will create a vacuum effect that will suck the remaining liquid into the cylinders.
Let’s look at the main risks in more detail:
- 🛑 Leakage of transmission oil from lower unit through the glands.
- ⛽ Leaking gasoline into the crankcase of the engine and liquefying the lubricant.
- 💧 The entry of condensate and moisture into the exhaust system through a muffler.
- 🔧 Deformation of rubber seals and gaskets due to uneven pressure.
Two-stroke vs. four-stroke: is there a difference?
The fundamental difference in the principles of operation dictates different storage rules. Two-stroke engines (2T) are structurally simpler: they are lubricated with oil mixed with fuel or fed separately into a crank chamber, and they don't have a full-fledged oil crankcase as in car engines.
For 2T engines Side storage is less critical, but it's still undesirable, and the main danger is that the fuel mixture leaks out of the carburetor and hits the bottom cylinder (if there are two) or just a crank chamber, which can cause the engine to spit out the candle when it starts.
The situation four-stroke (4T) is much more serious. Their design includes a full-fledged lubrication system with an oil crankcase, a valve mechanism (often located in the head of the block), and a complex gas distribution system.
If you put the 4T motor on its side, the oil from the crankcase will flow into the cylinder through the piston rings or through the crankcase ventilation system. In addition, oil can enter the combustion chamber through valves if they do not provide perfect tightness in the closed state (and there is no perfect tightness). hydrostroke.
⚠️ For four-stroke engines with a capacity of more than 15 hp, storage in a horizontal position is strictly prohibited by manufacturers, since the risk of damage to the valve mechanism and the piston group is close to 100%.
A risk comparison table will help to assess the degree of risk:
| Parameter | two-stroke motor | four-stroke |
|---|---|---|
| Risk of oil leakage | Low (oil in the mixture) | Critical (oil in the crankcase) |
| Risk of hydrostroke | Medium (fuel) | High (oil + fuel) |
| Storage situation | Permissible (short term) | Forbidden. |
| Impact on the ossels | Moderate. | High (pillar of oil pressure) |
Why are 4-strokes afraid of the side?
In a four-stroke engine, the oil is in a pallet, and at a tilt of more than 45 degrees, the oil flows to the cylinder walls, and if it enters the combustion chamber above the piston, the first compression stroke will put the piston into an incompressible liquid, which is called a hydraulic shock, which breaks the rod or breaks the cylinder block.
Impact on the gearbox and the dayval
Special attention should be paid to the lower part of the engine. deadwall This is where the most frequent leaks occur when stored improperly, and inside the gearbox is a transmission oil that is designed to be vertically positioned.
When you put the motor on your side, the oil level shifts, and if you put the motor on the side where the drain or the air propeller is located, the oil just leaks out, soiling the floor and leaving the gears unprotected from corrosion, and if you put it on the opposite side, the oil can prop up the oal of the propeller from the inside.
Salmon The long-term static pressure of the oil column on the coil cuff in a horizontal position can cause it to be squeezed out or microcracked, and in the spring you get an emulsion motor in the gearbox.
To avoid problems with deidval, it is needed:
- 🔩 Always check the puff of the drain screw before changing position.
- 📉 Pour the transmission oil before long-term storage on the side (if this is inevitable).
- 🔄 Change the oils of the daydval every 2-3 seasons of active operation.
☑️ Preparing the gearbox for winter
Preservation rules before laying
If your storage space physically doesn't allow you to hold the motor upright and you have to put it down, you have to do a lot of preparation. Just turn it off and put it down is the way to expensive repairs. Conservation In this case, it becomes a mandatory procedure.
The first thing you do is to completely empty the fuel system. Gasoline oxidizes during the winter, turning into resins that clog the carburetor jelly or injector injector injectors. For two-stroke engines, it is recommended to develop the remaining fuel or drain it through the carburetor jelly. fuel-filter.
Then you have to do the cylinder-piston group, through the candle hole (pre-twisted). spark-plate) a special conservation oil (fog spray) is injected, and then the crankshaft is slowly rolled several times to spread the oil over the cylinder walls and bearings, creating a protective film.
⚠️ Warning: Don't use conventional motor oil for preservation. It drains off the walls during the winter. Use special aerosols marked "Fogging Oil" or "Storage Spray" that form a sticky, leaky film.
An important step is to protect against corrosion of external elements. All metal surfaces, especially aluminum alloys, should be treated with an anti-corrosion spray. Pay special attention to the places of paint chips and electrical contacts.
Use silicone lubrication to process electrical connectors and high-voltage caps, which will prevent contact oxidation and spark problems in the spring.
Organization of the place: how to put it correctly
If you do decide to store the engine lying down, it's important to choose the right side. Most manufacturers only allow stacking on one particular side - usually the side opposite to the carburetor and the muffler. Generally, it's the left side (when viewed from the dadeval side), but it's better to check the manual to your model. Yamaha, Mercury or Tohatsu.
You have to put a soft but dense base for an outboard motor, and a piece of tight carpet, a rubber mat, or a cloth-covered wooden crate is perfect, and you can't put the motor directly on a concrete floor or a metal shelf, and that will cause vibrations (if you have machinery nearby) and condensation.
And you also need to have stability, because the motor doesn't have to be on the edge of the deadwell, it has to be fixed so that you don't roll around, you can use wooden bars to nail them to the floor or put them for an outboard motor.
Key points of the organization of the place:
- 🏗️ Use a solid, flat base without distortion.
- 🛡️ Insulate the engine metal from direct contact with the floor.
- 🌡️ Ensure air circulation around the unit (do not cover with a dense film).
The correct side-laying of the motor is possible only after the liquids are completely drained and the cylinders are treated with a preservative, and without these procedures, the risk of corrosion and jamming of the piston group increases many times over.
Frequent errors in storage
When you look at service centers in the spring, you can see the common mistakes that owners make, and the first and most common is to keep a full tank of gasoline in the engine, especially if you don't add fuel to it. stabilizerDuring 4-5 months of winter, the gasoline is stratified, and the heavy fractions clog the carburetor.
The second mistake is to store it in a plastic bag for dust, and the motor wrapped in plastic doesn't breathe, and when the temperature changes inside the bag, condensate falls out, which settles on the metal, causing spot corrosion, and it's better to use breathable cloth covers or leave the motor open in a clean room.
The third mistake is ignoring the lower unit, and many people forget that there can be water in the deadwall if the engine was not washed after the last operation, and as the water freezes, it expands and can damage the body or create pressure on the osteometers.
A list of things you can't do:
- ❌ Leave the motor under direct sunlight (ruin and plastic destruction).
- ❌ Put the motor on the dadewall (vertically upside down) without a special rack.
- ❌ Store near heat sources (batteries, ovens), which overdries the glands.
The WD-40 Myth
Many people put WD-40 in a canning cylinder. That's a mistake! WD-40 is a light oil solvent. It flushes out the lubricant perfectly and evaporates in a couple of months, leaving the dry metal. Use only special oils to preserve the inside of the engine.
FAQ: Answers to Frequently Asked Questions
Can I keep the new engine in a box lying down?
Yes, new motors in factory packaging are often stored and transported horizontally, but inside the box they are securely locked, and the fuel and oil from them are completely removed from the factory, and you can only store the used motor in a box lying down after careful preservation.
How long can a four-stroke motor stay on its side without consequences?
It's a critical time of more than 1-2 hours, and if you just have to move the engine in your car, that's okay, but storing it in that position, even for a day, can lead to oil spilling into the cylinder and start problems.
Do I need to remove the deidwall for storage?
For long winterings at home, this is great practice: a removed driedwall takes up less space, it is easier to preserve separately, and you take the load off the lower unit pipe and transom (if the engine is on a boat), but for conventional garage storage, this is not necessary.
What if the engine was on its side in winter and now it doesn’t start?
First, unscrew the candle and check if it's filled with fuel or oil. Blow the cylinder with a starter (with an open throttle) to remove the excess fluid. If the engine is four-stroke and there is a suspicion of hydraulic shock, do not try to spin the starter, bring to the service.
Does storage on the side affect the warranty?
Technically, no, unless there is external damage, but if the warranty handler finds traces of oil in the combustion chamber of a four-stroke engine or an emulsion in the gearbox caused by improper storage, you may be denied free repairs, arguing that this is a violation of operating conditions.