Choosing a powered motor for a boat is always about finding a trade-off between power, weight and cost of ownership. In the small power segment, where the 10-horsepower rating is the rule, the model is the model. Sailor 9.9 It has proven to be a reliable “working” option for small PVC boats and light aluminum boats, and has attracted attention for its simplicity of design, availability of spare parts and the ability to confidently sleeve a boat up to 3.5 meters long with a full load.
The two-stroke operation gives this engine excellent low-speed traction, which is critical when entering planing or counter-current mode. Sailor 9.9 It requires a competent primary break-in and regular maintenance, without which the life of the piston group can be significantly reduced. In this material, we will analyze all the nuances of the operation of this model, from the technical specifications to the finer points of tuning the fuel mixture.
It's worth noting that the popularity of this model among water engines is not only due to price, but also due to maintainability, the design of the engine is as unified as possible, which allows you to perform service on your own, even in the field. carburetor The ignition system will allow you to avoid many of the typical problems that beginners face in the first season of operation.
Technical specifications and design features
The heart of the unit is a single-cylinder air-cooled internal combustion engine, operating on a two-stroke cycle. The cylinder-piston group has a displacement of 169 cubic centimeters, which, when properly adjusted, allows you to remove the declared 9.9 horsepower. An important feature is the presence of a forced water circulation system for cooling, although the cylinder itself receives the main heat sink through the ribbon and incoming air flow.
The weight of the engine in running order is only 26 kilograms, making it one of the lightest in its class. This is a critical parameter for owners of inflatable boats, where every extra gram affects the buoyancy and stability of the vessel. The transom plate is made of reinforced aluminum alloy and allows you to attach the engine to boats with a transominal height of 381 to 508 millimeters.
The ignition system is based on the electronic CDI (Capacitor Discharge Ignition), which eliminates the need to adjust the gaps and replace contact groups, as was the case in old magdino systems.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Power | 9.9 | hp |
| Workload | 169 | cm3 |
| Ignition system | CDI | - |
| Weight. | 26 | kilogram |
| Tank volume | 12 | litter |
⚠️ Attention: Do not attempt to reach maximum speeds dry or without sufficient water pressure. The water pump (impeller) overheats in a matter of seconds and leads to the melting of the rubber impeller.
Power supply system and fuel mixture preparation
Proper preparation of the fuel mixture is the foundation of a long life for your family. Sailor 9.9Because the engine is two-stroke, the rubbing pairs (piston-cylinder-kelvinval) are lubricated with oil added directly to gasoline. Using poor-quality oil or breaking proportions leads to catastrophic consequences: either bullying in the cylinder from the "poor" mixture, or to coking candles and exhaust windows from the "rich".
For the break-in period and standard operation, it is recommended to use AI-92 gasoline and a special two-stroke oil with markings. TC-W3The mixing ratio is 1:50 (20 ml of oil per 1 liter of gasoline) for a break-in motor. During the initial break-in period (the first 10 hours of motor running), many mechanics advise a little enrichment of the mixture to 1:40 to ensure better lubrication when grinding parts.
Mixing should be done in a separate clean container, pre-shaking components. It is not recommended to pour oil and gasoline directly into the engine tank, as in this case it is impossible to guarantee the homogeneity of the emulsion, especially if the tank is not fully developed in one trip. Oil gasoline loses its properties during prolonged storage, so prepare the mixture for 2-3 fishing.
Use only fresh gasoline. Fuel that has been in the canister for more than 3 months, oxidizes and forms a resinous plaque that clogs the jelly carburetor.
The membrane-type carburetor installed on the model is stable regardless of the boat's tilt, but it is sensitive to the presence of water in the fuel, and it is recommended to use fuel filters-sludges installed on the feed hose to mechanically sift large particles of rust and dirt from the tank.
breaking in procedure: first start and first hours
The breaking in process is not a formality, but a necessary technological procedure, during which the friction surfaces are used to work and the thermal gaps stabilized. Ignoring this stage often leads to the engine not developing full power or starting to consume excessive amounts of fuel in the future. Sailor 9.9 It should be carried out exclusively on water, since in air the engine will not be able to enter operating temperature regimes and load specifications.
In the first 10 hours of operation, you can't open the throttle by more than 50 percent. The engine must be operated in a gentle mode, alternating average revolutions with short-term thrust increases. This allows the piston rings to sit properly in the grooves and create the necessary compression.
☑️ Checklist of successful break-in
After every 2-3 hours of work during the break-in period, you should conduct an external inspection. Pay special attention to the state of candle soak and the absence of leakage of fuel or oil in the area of the crankcase. If the candle is black and wet, the mixture is too rich, if white or gray-plated, poor, which is dangerously overheated. The ideal color of the electrode is brick-brown.
⚠️ Attention: It is strictly forbidden to keep the engine idling for a long time (more than 15-20 minutes) during breaking in, this leads to the formation of soot on the candle and in the muffler, since the combustion temperature on idles is too low for the mixture to completely burn out.
Management, driving performance and fuel consumption
On the water. Sailor 9.9 The control rump is easy to navigate and has clear position fixers; the engine is excellent at planing even with two passengers aboard a standard PVC boat. Due to its light weight, the boat's differentiation does not require the installation of additional hydrowings or transom plates, although their presence can improve the performance of the wave.
Fuel consumption is one of the key advantages of this model: in cruising mode (about 3,500-4000 rpm), gasoline consumption is about 2.5-3 liters per hour. At maximum speeds, when the boat goes to the plane, consumption can increase to 4-4.5 liters, which is an excellent indicator for a two-stroke engine of such power.
The engine is moderately noisy; the two-stroke nature of the operation creates a characteristic high-frequency sound, which, however, does not overlap the noise of the wind and the splash of water; the vibrations on the tiller are felt, but do not cause critical discomfort when driving for several hours; Many owners use homemade casings to reduce noise and vibration or modify the standard hood with sound insulation materials.
The secret to fuel economy
For maximum fuel economy, try to keep the boat in planing mode. Movement in transient mode (when the boat's nose is raised, but there is no planing yet) consumes 30-40% more fuel than full gas or a confident average stroke.
The rotor that comes with the kit is matched to the average boat. If your boat is heavily loaded or, conversely, very light, it makes sense to experiment with the screw pitch to get into the recommended range of revs (5000-6000 rpm at full gas).
Adjustment of the carburetor and maintenance of the ignition system
carburetor Sailor 9.9 It has three main adjustment screws: the mix quality screw at idle, the mix quantity screw and the maximum speed limit screws. Factory setting is usually optimal, but with time or change of climatic conditions may require correction. Adjustment should be made only on a warm engine.
To adjust the quality of the mixture at idle speeds, you need to smoothly rotate the corresponding screw, achieving the most stable idling speeds. If the engine stalls when the gas is opened abruptly ("failure"), the mixture needs to be enriched slightly (twisted the screw). If the engine "chokes" and smokes - impoverish (twrive the screw).
The CDI ignition system requires little or no intervention, except for periodic checks of the high-voltage wire and cap. However, if the engine starts to trip or stop under load, first check the spark plug. The black ignition lamp will indicate problems with carburetion, white - for overheating or poor mixture, and red - for the use of additives with ferrocene, which are strongly recommended.
Procedure for checking the spark:1. Unwrap the candle.
Put on the cap and press the thread to the mass of the engine.
3. sharply pull the starter (do not start the engine!).
4. The spark should be bright, blue and break the gap with a characteristic click.
The stable operation of the motor in all modes depends on the tightness of the intake tract. Sucking excess air through the gasket of the carburetor is a common cause of unstable idling.
Typical malfunctions and methods of their elimination
Owners may face a number of common problems in the process, most often lack of spark or weak start. Often the cause is not the engine itself, but as a fuel mixture or candle state. It is also worth checking the emergency stop button ("death button"), which, when the contacts are oxidized, can open the ignition circuit.
The second common problem is overheating. If the flow of water from the control hole becomes weak or disappears, immediately turn off the engine. The causes may be clogging the water intake with grass, sand or wear of the water pump impeller. Regular cleaning of the water intake hole and replacing the impeller pump every 2-3 seasons will eliminate this problem.
- 🛠️ The engine is dead on the gas: Check the fuel filter in the tank and the feed hose. Often the hose flattens or cracks, creating a vacuum plug.
- 🔥 The engine does not develop speed: A clog of the jeckler of the main dosing system of the carburetor or a violation of the tightness of the crankshaft coils is likely.
- 💨 Severe exhaust smoke: The proportion of oil in gasoline is broken or oil of poor quality is poured, not intended for two-stroke engines.
Special attention should be paid to the condition of the lower unit, if you hear a grinding or a hum, perhaps the production of a paddle shaft in the bearings or the hit of sand in the gearbox, in which case you need to defect and replace the lubrication of the gearbox with a special transmission.
FAQ: Frequently asked questions
Which petrol is better to fill in the Sailor 9.9: 92nd or 95th?
The manufacturer recommends using gasoline with an octane number of at least 90. The optimal choice is AI-92, as it is less prone to the formation of sodium when working on poor mixtures, characteristic of low capacity. Using 95th gasoline with modern environmental additives can lead to burnout of the piston due to a higher combustion temperature.
Can I store the engine in the winter with the remaining fuel in the carburetor?
It's not recommended, it evaporates, leaving resinous deposits that are clogged by carburetor jellyplates during winter downtime, and you have to extract the fuel from the float chamber or drain it completely through the drainage screw before you can preserve it.
Why does the engine smoke white smoke?
White smoke is normal for a two-stroke engine, especially when warmed up, it burns the oil added to the gasoline. If the smoke turns blue or black and the smell of burning appears, it is a signal of a misalignment of the mixture or a malfunction of the piston group.
How often should you change the oil in the gearbox?
Replacement of oil in the gearbox (gear oil) should be carried out at least once a season, preferably before winter preservation, this will remove possible condensation moisture from the crankcase and prevent corrosion of gears. The oil should be transparent; if it has acquired a milky shade, then water through the coils has entered the gearbox.