Owning a boat is not only the pleasure of cruising and the excitement of fishing, but also constant care about the technical condition of the boat. outboard motor It is the most expensive and vulnerable element of the kit, exposed to aggressive effects of salt or fresh water, ultraviolet light and mechanical damage, which is why the issue of additional protection of the power unit is faced by every owner, especially if the boat is stored in an open parking lot or often transported in a trailer without a special awning.
Many boaters are wondering whether to buy or sew cap If the motor already has a regular plastic casing, the answer is not as obvious as it might seem, and depends on many factors: engine type, storage conditions and operating frequency. In this article, we will discuss all aspects of using additional caps so that you can make an informed decision.
The main purpose of any shelter is to extend the life of the machinery and maintain the aesthetic appearance of the equipment, but the wrong approach to choosing or installing protection can lead to the opposite effect, causing corrosion or overheating of residual moisture inside the mechanisms. Understanding the physics of processes The inside of the engine compartment will help to avoid common errors.
Why you need an extra cap: Risk analysis
The regular plastic housing, which comes with the motor, performs primarily decorative and aerodynamic functions, and also protects against splashes during movement. However, it is not sealed and often has ventilation holes. hood The engine is designed to close the engine completely, creating a barrier to dust, bird droppings, direct sunlight and precipitation.
This is especially true for boats that are stored in open water or on an open-air trailer, and solar ultrafilene can burn paint on lower unit in one season and make plastic brittle. Constant wetting and subsequent drying without full drying leads to accelerated corrosion of metal parts.
In case of accidental damage, when transported or stored in a garage, where a tight, soft but durable case can save the engine body from scratches and chips, it is important to understand the difference between protection during movement (where you need rigid casings) and protection when parking (where materials that breathe and drain moisture are more important).
Impact of protection on cooling and ventilation system
The most critical thing to do when you use any cover is ventilation. Outboard Motors, especially two-stroke motors, stay hot after work. If you put on a tight, non-breathable cap right away, you have a greenhouse effect inside. Condensate that falls on cold metal surfaces mixes with the residues of oil and fuel, forming an aggressive environment.
For four-stroke engines, the situation is similar, but the risk of oxidation of electrical contacts and aging of rubber seals due to high temperature and humidity is added. Air circulation inside the protective cover must be provided constructively or by the correct selection of materials.
⚠️ Attention: Never put a sealed protective cap on a hot engine immediately after operation, and allow the engine to cool completely for at least 30-40 minutes to avoid condensation inside the casing.
Modern high-quality cases often have special ventilation valves or are made of mesh materials at the top. This allows air to circulate, bringing moisture out, but does not let rain and dust inside. Using plastic bags or film as temporary protection is a gross mistake that is guaranteed to lead to rust.
What are "breathing" tissues?
Breathable materials are materials that allow water vapor molecules to pass from the inside out, but do not allow liquid water to pass from the outside, often fabrics with a membrane or special weaving of threads treated with water repellent impregnation (DWR).
Types of protective caps and materials
The water accessories market offers many protection options, depending on budget, engine model and storage conditions, and the main types of materials used for tailoring covers have their advantages and disadvantages.
The most common option is oxford (Oxford) It's a durable, inexpensive fabric that holds a good shape, but a cheap Oxford can quickly fade in the sun and crack in the cold. Taslan Or specialized marine tissues with UV stabilizers.
- 🌧️ Waterproof: A critical parameter, measured in mm of water column, must be at least 3,000 mm for reliable protection.
- ☀️ UV protection: The presence of UV stabilizers prevents the destruction of tissue structure and color fading.
- 💨 Wind resistance: The presence of windshield skirts and high-quality fittings (fastexes, lightning) will not allow the wind to tear the case during a storm.
There are also hard plastic caps that come on top, which provide better mechanical protection, but require more storage space when not in use, and soft covers are more convenient, and can be folded into a boat's hazel.
When choosing a case, pay attention to the seams. They must be glued or made with a double needle using reinforced threads, otherwise the fabric will be "lined" under tension, and the cover will begin to leak water.
Comparative table of materials for covers
To make it easier to choose, we compare the main specifications of popular materials, which will help determine which option is suitable for your operating conditions.
| Materials | Water resistance | Duration of service (years) | Price. |
|---|---|---|---|
| Oxford 210D (PVC) | High. | 2-3 | Low. |
| Oxford 600D (PU) | Medium | 3-5 | Medium |
| Taslan (impregnated) | High. | 5-7 | High. |
| Acrylic fabric (Marine grade) | Medium (breathing) | 7-10 | Very high. |
As you can see from the table, cheap solutions do not last long and require frequent replacement, while investments in quality materials pay off with a long service life. Acrylic tissue The sea class is considered a benchmark, as they do not rot and perfectly tolerate the sun, although they pass water in a heavy rainstorm (but quickly dry).
When buying a finished product or ordering tailoring, be sure to specify the type of fabric used. Sellers often refer to all cases as "Oxford" without specifying the density (D) and type of coating, although the difference in properties can be drastic.
Instructions for installation and care of protective cover
The right fit is the key to the effective operation of the case, just to throw the fabric on top is not enough, you need to ensure a tight fit, so that the gusts of wind do not rub material against the protruding parts of the engine, causing abrasion.
Most high-quality models have an elastic cord along the lower perimeter or a system of belts with fastexes. It is important to fix the case so that it does not hang, but also does not press on plastic controls (gas handle, reverse lever).
☑️ Checking the installation of the cover
The care of the cover itself is also necessary, and the dirt, salt and bird droppings left on the fabric can damage its protective layer, it is recommended to periodically remove the cover, shake off the dust and, if necessary, wipe with a wet sponge with a soft detergent.
⚠️ Attention: Do not use aggressive chemicals, solvents or hard brushes to clean protective covers; this can wash away the water-repellent impregnation and damage the fabric structure.
If you notice that the seams have begun to diverge or the fabric in the folds has lost color, it is worth considering repairing or replacing the product. Operating a damaged case can cause water to flow in and stagnate, creating ideal conditions for corrosion.
Features of operation in different conditions
The conditions of operation dictate their own requirements for protection, and if your boat is standing in a dry, heated box, a simple anther of soft fabric is enough, but for the harsh conditions of an open parking lot, the requirements are much higher.
In winter, when the engine is conserved, the case must withstand snow loads and low temperatures. The fabric must not tan and crack in the cold. Winter storage requires special attention to tightness, so that melt water does not get inside in the spring.
In the summer, the sun and humidity become the main enemy, and here the most important thing is UV protection and the ability to dry quickly. If the boat is used for fishing in brackish water, regular washing of the salt cover becomes a mandatory procedure, since the salts are hygroscopic and constantly keep the surface moist.
There is no universal solution: a lightweight case will suit the garage, and for an open parking, a dense, multi-layered version with enhanced protection from ultraviolet light is necessary.
Frequently Asked Questions (FAQ)
Can I use a car from one brand of motor on another?
Yes, you can if the power (hp) and the type of lower unit (short/long) are the same, the shape of the casings from different manufacturers (Yamaha, Mercury, Tohatsu) may vary slightly, but the elastic fabrics usually allow you to pull the case on the motor of similar power, the main thing is that the holes under the controls coincide.
Do I need to remove the battery if I wear a cover?
Yes, the battery is best removed for long-term storage, regardless of the case, but the case will protect the terminals from oxidation and accidental short circuit if the boat gets moisture or an animal.
How often should I change the protective cap?
The life of the product depends on the quality of the material and the conditions. Cheap covers last 1-2 seasons, after which they start to leak water; quality products made of marine fabrics can last 5-7 years or more with proper care; Keep an eye on the condition of the seams and water repellent impregnation.
Will the cover protect you from motor theft?
No, a conventional fabric case is not an anti-theft device, it only hides the model and condition of the engine from prying eyes. To protect against theft, use special cables and locks, putting them through regular holes in the transom or lower unit.