Cleaner of the outboard motor from plaque: the complete guide

The operation of water technology in an aggressive salt or fresh environment inevitably leads to the appearance of various deposits. Rail cleaner for the outboard motor It becomes a critical tool when solid layers appear on the lower unit, propeller and internal cooling channels, and ignoring this problem can lead to overheating of the power unit, lower propeller efficiency and, ultimately, costly overhauls.

Many boat owners mistakenly believe that it is enough to wash the engine with soap and water after each walk, but the chemical composition of water containing hardness salts, minerals and micro-algae requires the use of specialized water. chemistryIn this article, we will discuss how to choose the right composition, what is dangerous carbonate plaque and how to conduct a deep cleaning without damaging aluminum and non-ferrous metals.

The current market offers many solutions, from aggressive acid compounds to soft alkaline emulsions. The choice of the specific agent depends on the type of contamination, whether it is oil film, rust or limestone. Understanding the nature of pollution is the first step to saving your engine.

Nature of pollution and types of raid on the motor

Before you can grab a bottle of cleaning products, you need to identify the enemy. boat-engine There are three main types of deposits that can form, each requiring a different approach, most commonly white or yellowish, which is the result of water evaporation and the precipitation of calcium and magnesium salts, a process that is particularly intense in seawater, where salt concentrations are high.

The second type of pollution is biological fouling: microscopic algae, shells and shellfish attach to hot surfaces, such as the thermostat and exhaust holes. They create a dense layer that not only impairs heat transfer, but can also mechanically block ducts. The third type is oxides and corrosion, which are caused by galvanic vapors between different metals in the motor design.

It is important to understand that scooping And mineral sediment removal is a different process, acid cleaners are great at salts, but they can be useless against organics, but alkaline compounds are good at breaking down fats and organics, but they don't dissolve stone, and using the wrong chemistry can only be a waste of time and money.

Choice of chemistry: acid, alkaline and neutral compositions

Choosing the right one engine-cleaner Acids (based on hydrochloric, phosphoric or citric acid) are leaders in the fight against carbonate deposits; they effectively dissolve rock by turning solid salts into soluble compounds; however, they require extreme caution when dealing with the aluminum alloys that make most lower units.

Alkaline cleaners are designed to remove organic contaminants, oils and biological fouling. They are less aggressive to metals, but can adversely affect rubber seals and gaskets during prolonged contact. Neutral agents are often used for finishing and removing light contaminants, they are safe for all materials, but do not have a powerful dissolving effect.

The dangers of popular methods

Many people use vinegar or Coca-Cola to clean it, and it works, but it takes hours, and the effectiveness is questionable compared to specialized products that contain corrosion inhibitors.

When choosing a tool, pay attention to the presence in the composition corrosion inhibitorsThese additives create a protective film on the metal after cleaning, preventing re-oxidation, and it is also important that the cleaner is biodegradable so that the water body does not harm the ecology when flushed.

Technology of external cleaning of lower unit and screw

The process of cleaning the outside of the motor requires consistency and safety. Before applying any chemical, the motor must be silenced and cooled. The hot metal can cause the purifier to evaporate instantly, which will reduce its efficiency and create a cloud of harmful vapors.

Apply the chosen product evenly with a spray spray or soft brush. Pay special attention to the areas around the lower unit pipe, the bracket of the paddock and the propeller itself. Here, plaque accumulates most quickly due to the turbulence of the water flows. Do not use metal brushes to clean aluminum, as they can damage the anti-corrosion coating.

• 🧼 Rinse the engine thoroughly with fresh water before applying the chemicals to remove sand and silt.
• 🧤 Use rubber gloves and safety glasses when working with acidic compounds.
• ⏱ Observe the exposure time specified by the manufacturer, do not overexert the product on metal.
• 💦 After treatment, rinse the surface abundantly with plenty of fresh water.

After the wash is completed, it is recommended to apply silicone lubricant or a special protective spray to the cleaned surfaces, which will help to push water away and slow the formation of a new plaque, regular external treatment prolongs the life of the paint coating and preserves the aesthetic appearance of the equipment.

Flushing the cooling system: removal of internal deposits

The most critical part of maintenance is cleaning the internal channels of the cooling system. scale-up The narrowing of the ducts leads to a disruption of the circulation of antifreeze or off-shore water, which causes local overheating of the cylinders and the head of the block.

The cooling system uses special fluids that circulate through the engine with water, the motor is run on a barrel or in a tank of solution, the circulating fluid washes the deposits from the cooling shirt, the thermostat and water pump, it is important to monitor the temperature of the engine during the procedure to prevent boiling.

If the motor has been out of service for a long time, a single wash may not work, in which case the procedure is repeated several times, changing the solution, and after the cycle is completed, you must wash the system with clean water to neutralize the acid residue and prevent corrosion from the inside.

Cleaner type	Principal appointment	Time of exposure	Safety for aluminum
Acid (based on HCl)	Removal of lime plaque, salts	5-15 minutes	It requires caution.
Alkaline.	Organic, oils, algae	10-20 minutes.	High.
Neutral.	Daily wash, dust.	No restrictions.	Absolutely safe.
Preservative spray	Protection after washing	Don't flush.	Safe.

Cleaning of the carburetor and fuel system

Although the topic of this article is about the hull and cooling system, the fuel system cannot be ignored. Carburettor cleaner It's necessary to remove lacquer deposits and resins that are formed from poor-quality gasoline, and these deposits clog the jellyplates, disrupting the mixture.

Using fuel additives or aerosol cleaners when the engine is idling, it dissolves deposits in hard-to-reach areas, especially in two-stroke engines where the fuel mixture passes through a crank chamber.

⚠️ Attention: Never use aggressive acidic cleaners to flush the fuel system, which will destroy the rubber membranes and carburettor seals.

Regular use of high-quality cleaners of the fuel system improves engine handling and reduces fuel consumption. If the engine began to work unstable or stall on idles, first of all it is worth checking the condition of the jelly and, if necessary, blow them with an aerosol cleaner.

Frequent cleaning errors and precautions

Inexperienced boaters often make mistakes that negate all cleaning efforts or even damage machinery. One of the most common mistakes is using abrasive powders and metal sponges, leaving micro-scratches on aluminum, in which dirt and salts will accumulate even faster in the future.

Another mistake is mixing different chemicals, for example, a combination of chlorine-bearing bleach and acid cleaners can result in the release of poisonous chlorine gas. Always use only one remedy at a time and flush it thoroughly before using another.

• 🚫 Do not wash the hot engine with cold water – this can cause deformation of the metal.
• 🚫 Avoid getting chemicals on electrical connections and starter.
• 🚫 Do not leave the acid cleaner to dry on the metal surface.

Chemistry precautions are key to your health and engine safety: Work in a well-ventilated area or outdoors. When you get the product on your skin, wash the area immediately with plenty of water.

Prevention of plaque formation

The best way to control plaque is to keep it out of the way, and it takes less time to maintain routine maintenance than to deal with the effects of corrosion and overgrowth, and after each operation in salt water, the motor must be washed with fresh water.

The use of tread anodes also plays an important role: Magnesium or zinc anodes take the hit of galvanic corrosion, protecting the main parts of the motor, regularly check the condition of the anodes and replace them as you wear them.

Storing the motor in a dry, ventilated room significantly reduces the risk of condensation and subsequent oxidation. If the motor is stored outside, use a special cover that protects against rain, but allows air to circulate.

How often should the engine be cleaned?

Deep cleaning with strong chemicals is recommended at least once a season, preferably at the end of the navigation before canning for the winter. If you operate a boat in very salty water (for example, in the Dead Sea or heavily polluted bodies of water), the frequency of procedures should be increased to once a month.

Can I use household products to clean plumbing?

Technically, some household products (e.g., containing orthophosphoric acid) can remove plaque, but they do not contain the corrosion inhibitors required for non-ferrous metals. Their use can lead to accelerated destruction of aluminum alloys. chemistry.

What to do if the cleanser hits the skin?

Immediately wash the product with plenty of running water for 10-15 minutes. If irritation, redness or burns, consult your doctor. Always work with protective gloves and glasses, as concentrated acids and alkalis are dangerous to the mucous membranes.

Is a washed-out fish cleaner harmful?

Most specialized outboard cleaners are biodegradable and environmentally friendly when used properly. However, concentrated solution can be toxic. Try to wash in designated areas or on a slip to minimize the chemicals getting on the water.