Choosing a first or additional engine for a small boat is often a challenge, especially when budgets are tight and reliability requirements are high. Sharmax The five-strong model of this manufacturer is a classic solution for fishing and relaxing in calm water, combining affordable cost with acceptable build quality.
In this review, we will take a closer look at the technical nuances, hidden opportunities and real challenges that can be faced with this unit, explaining why 5 horsepower is considered the “middle ground” for many PVC boat owners and why this engine does not require rights to drive under current legislation.
It is worth noting that Sharmax 5 It is often confused with other brands because of the similarity of the design to Tohatsu or Mercury, as many Chinese factories use time-tested Japanese designs, but this model has its own unique features that must be considered before buying, so as not to be disappointed in the result.
Technical specifications and design
Engine. Sharmax 5 It is a two-stroke engine, which determines its design and maintenance requirements. The cylinder capacity is standard for this class of 98 cubic centimeters, which allows you to develop sufficient thrust to output light inflatable boats.
The ignition system here is implemented via an electronic CDI, which provides stable spark formation even at low revs, unlike older contact systems. An important element is the presence of a built-in fuel tank of 1.2 liters, which makes the design as autonomous and compact as possible.
The design uses forced water cooling, the efficiency of which depends on the purity of the water intake holes. The motor is equipped with a standard-length lower unit suitable for most transoms and weighs only about 19 kilograms, which greatly facilitates its transportation.
- 🚤 Engine type: two-stroke, single-cylinder water-cooled
- ⚙️ Power: 5 hp (3.7 kW) at 4500-5500 rpm
- ⛽ Tank volume: built-in 1.2 liters (consumption of about 1.5-2 l / hour)
- 🔊 Noise level: medium, requires high-quality running to reduce vibrations
⚠️ Attention: When installing the motor, make sure that the anticavitacin stove is below water level by at least 10-15 cm to avoid overheating and loss of traction.
Before the first start, be sure to check the tightening of all bolt joints, as during transportation from the plant the fastener could weaken.
Gas start-up system and control
The engine is started manually by a traction cable that is wound on the flywheel. The start mechanism is quite soft, but requires a confident and sharp jerk, especially on a cold engine. To facilitate the procedure, the carburetor provides a fuel pump, which must be pressed several times before starting.
Gas control is implemented through the rotary handle of the hummel, which is the most convenient and traditional solution for low power. Turning the handle counterclockwise increases the supply of the fuel mixture, allowing you to smoothly gain momentum or accelerate sharply if necessary.
It's important to remember that there's a safety system, which is represented by an engine emergency stop check. critically for the safety of the driver and passengers, as the engine instantly stops when a person falls overboard.
- 🔌 Safety check: It is mandatory to use each time you go to water.
- 🔄 Idle adjustment: carburetor
- 🎚️ The puncher: It allows the gas to be fixed at a certain level.
☑️ Pre-launch checks
Fuel consumption and economy
One of the main advantages of a two-stroke five-mower is its moderate appetite: when you move half-strength, which is about 2500-3000 rpm, the engine consumes about 1.2-1.5 liters of mixture per hour, which is enough for a whole day of fishing, given the volume of the built-in tank.
When driving in full gas, the consumption increases to 2-2.5 liters per hour, but in this mode the engine runs at its limit, which is not recommended for a long time.
The fuel must be prepared using AI-92 or AI-95 gasoline and a quality two-stroke oil, and the mixing ratio is usually 1:25 for break-in and 1:50 for further use, unless otherwise indicated by the oil manufacturer.
| Mode of work | Turnover (rpm) | Fuel consumption (l/hour) | Working time on 1 tank |
|---|---|---|---|
| Idle move | 1000-1500 | ~0.6 | ~2 hours |
| Trolling (30-40%) | 2500-3000 | ~1.3 | ~50 minutes. |
| Full gas (100%) | 5000-5500 | ~2.2 | ~30 minutes. |
How do you save fuel?
To save fuel, try to keep the boat on plane at the lowest possible speeds, choosing the optimal angle of the trim and loading.
Running and setting up the carburetor
The process of breaking in is key-stage In the life of any two-stroke engine, the Sharmax 5 is no exception, and ignoring the test-in recommendations can lead to piston group bullies and loss of compression in the first hours of operation.
The first 10 liters of the fuel mixture must be rolled out at speeds below 50 percent of the maximum, which means you can't open the gas more than half the handle, and it's important to keep all moving parts running at constant speeds.
After the first tanks have been developed, it is recommended to check and adjust the carburetor if necessary. Factory settings may not correspond to the quality of the fuel in your area. Adjustment is made by three screws: the quality of the mixture, the amount of mixture (idle) and the throttle limiter.
⚠️ Attention: Never try to adjust the carburetor on a running motor out of water or without effective cooling, this is guaranteed to lead to overheating and jamming.
Typical malfunctions and methods of their elimination
Like any technique, Sharmax 5 can face certain issues, most of which are self-solved, and owners often complain of problems with starting after winter storage or unstable idling.
If the engine does not start, the first thing to check is the presence of a spark and the flow of fuel, often the cause is clogging of the carburetor jelly or failure of the spark plug, and it is also worth checking the compression, which must be within 8-10 atmospheres for normal operation.
Vibration and noise can be increased by wear of the lower unit shaft bearings or weakening of the engine's attachment to the transom. Regular lubrication of the knots and checking the tightening of the bolts help to avoid serious breakdowns.
- 🔧 Problem: The motor is dead on the blanks. Decision: cleaning of the carburetor and adjusting the screw quality
- 💧 Problem: Weak jet of cooling. Decision: check-hole
- 🔥 Problem: No spark. Decision: candle replacement or ignition coil check
90% of problems with starting two-stroke engines are related to the quality of the fuel mixture or the state of the spark plug, and not to serious engine breakdowns.
Final evaluation and purchase recommendations
Motor. Sharmax 5 It is a decent option for those looking for a budget solution for small bodies of water, its design is simple and maintainable, and spare parts are available in most specialty stores.
Of course, in terms of comfort and reliability, it is inferior to the famous Japanese counterparts, but the difference in price fully justifies this compromise for beginners or avid fishermen.
Before buying, be sure to inspect the engine for external defects, check the equipment and availability of warranty. It will not be superfluous to ask about the availability of service centers in your region, so that in case of complex repairs, you will not be left without equipment for the entire season.
Do you need a license to drive a Sharmax 5 engine?
Under current Russian law, registration and rights are not required to operate a small vessel with a power up to 8 kW (roughly 10.88 hp), and since the Sharmax 5 has a power of 5 hp (about 3.7 kW), rights to it are not required.
What is the best oil to use in Sharmax 5?
It is recommended to use mineral or semi-synthetic oils for two-stroke air-cooled or water-cooled engines labeled TC-W3. Brands like Motul, Shell or specialized oils for outboard motors will be the best choice.
Can I use Sharmax 5 for trolling?
Yes, this motor is great for trolling because it can operate at low revs. However, it is worth keeping an eye on the engine temperature, because with prolonged operation on a minimum gas, there may not be enough water circulation to cool.