Exploitation of Soviet classics of water technology, such as outboard motors series saluteIt requires not only the owner's control skills, but also a deep understanding of the two-stroke engine. One of the most vulnerable parts that directly affect start-up, stability and fuel consumption is the spark system. salute is able to reanimate the unit, which was already wanted to write off in scrap, or, conversely, the wrong choice can lead to a failure of the piston and serious repairs.
Owners often underestimate the importance of this small part, relying on the principle of "just shrill." However, in two-stroke engines, where oil-gasoline mixture lubricates, thermal regime and clearance of electrodes play a critical role. In this article, we will examine the technical nuances, model compatibility and diagnostic secrets that will help your engine work like a clock.
Many modern water engines switch to four-stroke analogues, but salute It's a favorite of fishermen for its maintenance and simplicity, and understanding the combustion processes of the mixture in the cylinder will help you avoid sudden stops in the middle of a body of water, and let's look at what's going on inside the combustion chamber and how the state of the candle affects this process.
Technical specifications and marking of candles
For internal combustion engines fitted to outboard motors Salut-M And the design of the ignition system, and the modifications, was very specific, and the standard recommendation of the manufacturer was to install a candle type. A11-3 The number "11" in the label indicates the kalyl number, which is a key parameter for two-strokes.
The potassium number determines the ability of a candle to remove heat. If you put too hot a candle (with a low potassium number), it will overheat, causing potassium ignition and potential burnout of the piston. Too cold part quickly becomes covered with garlic and stops giving a spark. The number 11 is a strictly recommended standard. for this series of engines, and to retreat from it without good reason (for example, constant movement at full gas) is not worth it.
The standard product part for Salute The candles have a diameter of M14×1.25 and a length of thread is 19 mm (long thread). The use of candles with a short thread (12.7 mm) is possible only with the installation of an additional washer extension, otherwise the spark gap will be too high in the combustion chamber, which will worsen the ignition of the mixture.
- 🔥 A11-3 - classic Soviet version with a copper central electrode, requiring frequent cleaning.
- ⚡ A11-6 - More modern modification with improved spark formation.
- 💎 NGK BPR5ES - popular Japanese analogue, where the number 5 corresponds to the kalyl number 11 on the Russian scale.
- 🛠 Denso W16EPR-U - reliable version with nickel coating, providing a stable spark.
When buying imported analogues, it is important to pay attention to the presence of a resistor in the design (denoted by the letter R or P in the marking). salute less sensitive to interference than electronic, the use of resistive candles prolongs the life of the ignition coil and high-voltage wire.
Compatibility table and analogues
Finding original Soviet candles can be difficult today, so water-engineers often turn to products of foreign brands. It is important to understand the correspondence of the potassium numbers of different manufacturers, since the scales differ from them. Russian and old European scale (where 11 is the norm) differ from Japanese (NGK, Denso), where lower numbers are used.
Here's a table that will help you find a similar one if you haven't found the original. Remember that the thread geometry and the length of the insulator should match perfectly so as not to damage the cylinder head or piston.
| Original (USSR/RF) | NGK (Japan) | Denso (Japan) | Bosch (Germany) | Champion (USA) |
|---|---|---|---|---|
| A11-3/A11-6 | BPR5ES | W16EPR-U | WR7DC+ | RN9YC |
| A14 (for tuning) | BPR6ES | W20EPR-U | WR8DC+ | RN10YC |
| A17 (not recommended) | BPR7ES | W22EPR-U | WR9DC+ | RN12YC |
| A11H (jamming-down) | BPR5ES-N | W16EPR-U | WR7DP+ | RN9YCC |
The use of candles with a potassium number above 11 (for example, A17 or NGK BPR7ES) is permissible only if the engine is constantly running at full speed when towing heavy loads.
⚠️ Attention: Never use short- threaded candles without a compensating washer. This will cause spark discharge to occur in the recess of the cylinder head rather than in the center of the combustion chamber, causing power loss and coking.
Gap adjustment and installation
Even the most expensive and high-quality candle will not work correctly unless the right gap between the electrodes is exposed. salute The optimal distance is considered to be within 0.5-0.6 mmFactory settings are often knocked down during transportation or careless cleaning.
The clearance must be checked with a special probe. The use of improvised tools such as needles or blades is not recommended, as they do not give an exact thickness and can damage the spray on the electrodes. If the gap is too large, the spark will break through unstablely, especially at high revs, which will lead to the "trotting" of the engine.
The adjustment process is as follows:
- Visually examine the state of the side electrode.
- Carefully bend the side electrode with a slight pressure of a finger or tool.
- Insert a probe with a thickness of 0.5 mm - it should pass with light friction.
- The probe of 0.6 mm must pass with force or not at all.
☑️ Pre-installing check
When you screw a candle into the cylinder head, be careful. Salute, soft and easily damaged. A draught can lead to a broken thread, repairing which in the field is extremely difficult. The moment of tightening should be moderate: after the candle touches the saddle, it is enough to turn it 1/4 - 1/2 revolutions with the key.
Diagnosis of the state of the engine by lobe
The color and structure of the insulator and electrodes is the best diagnostic tool for a water motor, and regular visual inspection can identify problems with carburetion or lubrication system at an early stage without waiting for major repairs.
It is normal to have a brick brown or light grey skirt in the insulator, a thin layer of dry soda, and any abnormalities in color indicate an imbalance in the engine.
- 🌑 Black velvety garnet: It indicates a re-enriched mixture (lots of gasoline, not enough air) or an excess of oil in the mixture, and a calyl number mismatch (candle too cold) is also possible.
- 🌫 Oily black soda: It's a sign of oil entering the combustion chamber, and it could be because of the wrong proportion of the mixture, the wear of the piston rings or the osteometers.
- ⚪ White or melted insulator: It's a dangerous symptom of overheating, too poor, too early, or too hot.
- 🔴 Reddish plaque: indicates the use of additives with ferrocene or low-quality gasoline with a high content of metals.
If you find white plaque or melting, you need to immediately stop operation, and the engine in this mode will cause the piston to burn and bully in the cylinder in a matter of minutes, in which case you should check the angle of ignition and the composition of the fuel mixture.
Frequent problems and their solution
Owners of outboard motors salute They often face a situation where the engine stops starting or stops under load. In 80 percent of cases, the problem is the ignition system, and the candle is the main suspect, but it doesn't always have to be changed, sometimes it's enough to get the right diagnosis.
One common problem is that the insulator or the tip of a high-voltage wire breaks down, and in high humidity and salt water, the spark can escape from the outer surface of the candle without getting into the cylinder, and visually, this can manifest as thin black paths on ceramics.
⚠️ Attention: If you see vertical black stripes on the ceramic insulator (tracking), this candle should be replaced, rubbing with alcohol or gasoline in this case will not help, since the dielectric structure of the ceramics is broken, and the breakdown will repeat.
Another common cause is a violation of the contact inside the cap of the high-voltage wire. Oxidation or weakening of the spring inside the candle cap leads to a loss of spark energy. It is recommended to periodically remove the cap, wipe the inside and check the reliability of contact with the thread or electrode of the candle.
And the impact of fuel quality is also worth considering: modern gasoline with lots of alcohol and additives can wash out the protective coatings of the electrodes faster, and if you use an old supply of gasoline, the likelihood of tar deposits is much higher.
FAQ: Frequently asked questions
Can I use car candles on the Salyut engine?
Theoretically, if the thread (M14×1.25) and the length of the thread (19 mm) match, car candles often have a different kalyl number and spark gap design. Using an inappropriate car candle (for example, too cold) will lead to rapid pollution and engine failure.
How often should I change the candle on the outboard motor?
A typical nickel candle on a two-stroke engine lasts about 100 hours, and when used in season, it can be one replacement per year, and platinum or iridium candles last longer, but on older engines like this. salute Their installation is economically inexpedient, since the ignition system is not able to fully unleash their potential.
Why does the candle always turn black, even if the proportion of the oil is correct?
There are several reasons: too rich mixture (little air), low caliber number of candles (it is "cold" for your driving mode), or use of oil of low quality that does not burn completely.
Can a candle be cleaned with sandblasting?
Yes, it's the best way to clean. Sandblasting removes the charcoal from all surfaces, including hard-to-reach areas under the side electrode, without damaging the metal. After sandblasting, be sure to blow the candle with compressed air and check the gap, as it may have changed during the cleaning process.
What to do if the thread in the cylinder head is broken?
Recovery of thread in the aluminum head Salute It's possible to install a repair sleeve or use candles with a larger diameter of the thread (repair), but it requires lathe work and precise installation, and it's easier and safer to replace the entire cylinder head at home if the damage is serious.