Choosing an outboard motor for a small inflatable boat or a lightweight aluminum boat often comes down to balancing power, weight and cost. In this market segment, Chinese units have been a special feature, which in recent years have been able to offer decent quality at an affordable price. Sharmax 9.9 outboard motorIt is a reliable “workhorse” for fishing and recreation.
This model attracts attention not only for its pricing policy, but also for the design simplicity characteristic of two-stroke engines. Sharmax 9.9 Those who need a time-tested scheme without complex electronics and sensitivity to gasoline quality are often chosen, and understanding all the nuances of operation will help owners avoid typical mistakes and extend the life of the equipment.
In this article, we will discuss in detail the technical features, real performance indicators and specifics of maintenance of this unit. two-stroke in this version remains relevant, and how to properly conduct the primary break-in for the maximum service life.
Technical specifications and design features
The heart of the model is two-cylinder It has an air-cooled air-cooled engine that is compact and relatively lightweight, with a displacement of 171 cubic centimeters, which is standard for this power class, and a single carburetor that feeds the fuel-air mixture into the cylinders through the petal valves.
⚠️ Attention: Do not try to adjust the carburetor by ear without having a gas analyzer or experience, as too poor a mixture can lead to overheating and bullying of the piston group.
The ignition system in The Sharmax 9.9 is implemented via a CDI (capacitor system), which makes it independent of an external battery at start-up, which means that even with a fully discharged battery or no battery, the motor can be started manually using a cable starter. Torque is transmitted to the propeller through a lower unit shaft, inside which passes a shaft enclosed in a lower unit pipe.
An important element of the design is the exhaust system, and the exhaust gases are removed through the exhaust windows in the cylinders and then through the water jacket, where they are cooled. Thermostat The classical version is not, but the temperature is controlled by the volume of circulating water, and the unit weighs about 26 kilograms, complete with a lower unit screw, making it relatively easy to carry to one person.
The secret of the popularity of two-tact
Unlike the four-stroke engine, the two-stroke engine does not require oil change in the crankcase, since the lubrication is done by the oil-gasoline mixture, which makes maintenance easier, but requires strict adherence to the proportions when preparing the fuel.
Real power: 9.9 or 15 horsepower?
There are often claims in the market that Sharmax 9.9 outboard motor It is actually a 15-horsepower unit, limited software or mechanically. Indeed, many manufacturers produce a single engine platform with a volume of 171 cc, which according to data-sheet figures can produce up to 15 hp In the case of the version on 9.9 hp, the limitation is most often achieved by changing the setting of the carburetor or the limiter of the throttle stroke.
For owners, this opens up opportunities for upgrades, but it is worth considering legal aspects. In Russia and a number of CIS countries, there is a threshold of 10 horsepower, below which there is no requirement for registration of a boat in the GIMS and the availability of rights to control. The Sharmax 9.9 falls into this green space, making it a hot spot for holiday-goers without red tape.
If you do decide to lift the restrictions, you get a speed boost, but you lose the legality of using it without registration. The mechanical rework usually involves squandering the carburetor's jellybars or removing the throttle stopper, and after that, the engine starts consuming more fuel and requires better quality. two-stroke oil.
Fuel consumption and efficiency of operation
One of the main issues when choosing a technique is its gluttony. Two-stroke engine It's inherently less economical than a four-stroke, because part of the fuel mix simply flies into the exhaust pipe along with the exhaust gas. Sharmax 9.9 average fuel consumption at full gas is about 3.0-3.5 liters per hour.
When driving at half-strength, which is about 3000-3500 revolutions per minute, consumption decreases to 1.5-2.0 liters. This is quite acceptable for an active angler who spends 4-6 hours on the water. A tank of 12 liters, either bundled or purchased separately, allows you to walk up to 30-40 kilometers without refueling in an economical mode.
- 🛢️ Proportion of mixture: The standard gasoline-to-oil ratio is 1:50 (20 ml of oil per 1 liter of gasoline) when using quality synthetic oils (TC-W3).
- ⛽ Gasoline quality: It is recommended to use gasoline brand AI-92 or AI-95 with an octane number not lower than stated in the instructions, avoiding fuel with an expired shelf life.
- 🌊 Effect of load: Consumption is directly dependent on the weight of the boat and the hydrodynamics of the hull; planing is achieved faster, but requires more energy to maintain speed.
It is worth noting that the use of poor-quality oil or violation of the proportions of mixing can lead to the formation of sodium on the skin. spark-plug This, in turn, leads to loss of power and increased fuel consumption, and regular checks of the exhaust color (it should not be very smoky) and the condition of the candles will help to keep flow under control.
Use only fresh oil for two-stroke engines. If the can of oil has been open for more than six months, it is better not to pour it into the engine, as the oil may gain moisture and lose its lubricating properties.
breaking in process: step-by-step instructions
Proper running is the foundation of a long life for you. boat-engineNeglecting this step can lead to rapid wear and tear of rubbing parts and reduced compression, the process takes approximately 10 hours of work, during which you need to observe a certain load regime.
The first two hours should be operated at a speed not exceeding 50% of the maximum power, this is necessary to latch the piston rings to the walls of the cylinders, during which it is strictly not recommended to give full gas or work at idle speeds, as this can lead to the coking of candles.
☑️ Checklist before first launch
From the third to the tenth hour, you can gradually increase the load, bringing the speed to 75-80%. It is important to periodically let the engine cool down. After every 2-3 hours of work, it is recommended to take a break for 10-15 minutes. maintenance: replace the oil in the gearbox, check the tightening of the screws of the lower unit fastening and clean the spark plugs.
⚠️ Attention: During the break-in (it is strictly forbidden) to sharply open the throttle valve. All changes in the mode of operation should occur smoothly to avoid local overheating of the piston.
Comparison with competitors: Tohatsu and Hidea
In the Russian market The Sharmax 9.9 is often compared to the products of well-known brands such as Tohatsu (MDS9.9) and Hidea (HD9.9). These engines have Chinese roots in production, but differ in their approach to quality control and configuration. Tohatsu is traditionally considered the benchmark of reliability in the small power class, but its cost is much higher.
Hidea offers a product that is almost identical to Sharmax in terms of technology, as they are often assembled in the same factories, the differences may be only in the color of the plastic, the configuration of screws and the availability of service centers in your area. Sharmax It benefits from aggressive pricing and the wide availability of spare parts.
| Parameter | Sharmax 9.9 | Tohatsu M 9.9B | Hidea HD9.9 |
|---|---|---|---|
| Power (hp) | 9.9 | 9.9 | 9.9 |
| Workload (cm3) | 171 | 169 | 171 |
| Weight (kg) | 26 | 27 | 26 |
| Launching system | Manual | Manual | Manual |
| Guarantee (month) | 12-24 | 24 | 12-24 |
When choosing between these models, you should focus not only on the technical specifications, but also on the presence of an authorized service near your home. Spare parts. For Chinese engines, the original Tohatsu components may differ in metal quality and processing.
Typical malfunctions and methods of their elimination
Like any technique, Sharmax 9.9 outboard motor The problem is that they may have some problems in operation, and most often, owners complain of difficulty starting or idling at unstable speeds, and 80 percent of the time, it's the fuel mixture or spark plug condition.
If the engine dies when you add gas, you should check the fuel filter and blow the carburetor's jellyboxes. Gasoline water is a common problem that can be solved by installing an additional separator filter. You should also pay attention to the cooling system: the absence of a trickle in the control hole indicates a break in the water pump or clogging channels.
- 🔧 Problem: The engine doesn't develop full speed. Decision: Check the condition of the air filter, clean the exhaust windows of the cylinders from soak.
- 🔥 Problem: Engine overheating. Decision: Replace the impeller pump, check the thermostat (if there is in the modification) or clean the cooling system from salts and debris.
- 💨 Problem: Strong vibration. Decision: Check the balancing of the propeller, the condition of the lower unit pipe and the mounting of the motor to the transom.
To diagnose the condition of the piston group, you can twist a candle. If it's black and wet, the mixture is too rich, if it's white or with a melted electrode it's poor. The normal color of the coar is brick-brown. Regular maintenance. gearbox (replacing oil every 50 hours or once a season) will avoid costly gear repairs.
Timely replacement of lower unit oils and the use of high-quality lubricant for the gearbox is the best prevention of water entering the transmission and subsequent corrosion of the gears.
Frequently Asked Questions (FAQ)
Can I use AI-92 gasoline for Sharmax 9.9?
Yes, the engine is designed to run on 92 octane gasoline, and 95 petrol is allowed, but it doesn't offer any significant power advantages for this model, as long as the fuel is fresh.
Which oil is better to pour: mineral or synthetic?
For two-stroke engines, especially during break-in and active operation, it is recommended to use semi-synthetic or synthetic oils of the TC-W3 standard. They provide better lubrication and form less scoop than mineral counterparts.
Do I need to register the Sharmax 9.9 outboard motor in GIMS?
The engine power is 9.9 hp, which is less than the threshold of 10 hp According to the current legislation of the Russian Federation, engines with a capacity of up to 10 hp inclusive (as well as up to 8 kW) are not subject to mandatory registration if the total weight of the curbed vessel does not exceed 200 kg.
What kind of propeller comes in the kit and can it be replaced?
The basic configuration usually features an aluminum propeller with a pitch matched to optimal planing with standard load, which can be replaced by a screw with a larger or smaller pitch to adjust engine speeds for a particular boat.