Choosing the first engine for an inflatable boat or a small boat is always a balance between price, reliability and power. In the segment of budget engines, Chinese units occupy a special place, among which the model is a model of the engine. Raffae 5 This two-stroke 5 horsepower engine is positioned as a versatile solution for lightweight PVC boats from 2 to 4 meters in length. Compact and simplicity of design They make it popular, but before buying it is worth understanding the real technical nuances.
Many users are wondering whether to connect with little-known brands, or pay more for a famous "Japanese" or "American." The answer lies in the operating conditions. If you want a motor for a quiet fishing trip on the lake, a walk with family or as a backup option for a large boat, then you can use it as a backup option for a large boat. Raffae 5 It's a great acquisition, it doesn't require much maintenance, it can run on a fuel mixture with a conventional oil for two-stroke engines, and it's important to understand that the savings in the buying phase require more attention to the process. break-in and the quality of fuel.
In this article, we will discuss in detail the design features of this unit, discuss typical problems and give practical tips for its maintenance. break-in It is critical for such models and how to prolong the life of Daydwood. The Raffae 5hp is often based on a proven design similar to the Tohatsu M5B engines, which guarantees spare parts. Let's dive into the technical details.
Technical specifications and design features
Engine. Raffae 5 It is a classic two-stroke single-cylinder unit, with a displacement of 99 cubic centimeters, which is standard for the 5 hp class, weighs in the range of 19-20 kilograms, which allows one person to easily carry and install it on a transom. The ignition system here is electronic (CDI), which eliminates the owner from the need to adjust the gaps on the contacts, as it was in the old Soviet engines.
The cooling system is particularly important. Raffae 5 It uses a forced water system with a centrifugal pump, and it takes water through holes in the lower unit, and it's effective, but it requires constant monitoring of the control jet. The absence of a control jet is the first signal of overheating. The gearbox made of aluminum alloy resistant to corrosion, but the quality of painting can vary depending on the batch.
The fuel system also has its own features: the engine has a built-in fuel tank of about 1.2 liters, which provides about 2-3 hours of full-thrust operation. The membrane carburetor allows the engine to operate at different angles of inclination, which is important for maneuvering on water. However, the sensitivity of the carburetor to fuel quality is high.
Secret power
Why do 5 hp sometimes go faster?: Some Raffae 5 models are structurally identical to 6-horsepower versions. They can have a limiter on the throttle or in the exhaust system. Removing the limiters (which is a violation of GIMS rules and deprives of warranty) theoretically can add a little power, but dramatically reduce the life of the engine.
The process of breaking in: a critical stage
How the first hour of work will go depends on half of your life. Raffae 5Many beginners make the mistake of giving full gas immediately, which leads to overheating of the piston group and bullies. Running is a process of grinding rubbing parts, and for two-stroke engines it is strictly regulated.
In the first 10 hours (or 3-4 fuel tanks) you must observe a gentle mode. The engine must operate at speeds not exceeding 50% of the maximum power. This means that you cannot rotate the gas handle to the end. The oil film must form uniformly, and the piston rings must take the correct shape in the grooves. Violation of this rule leads to increased oil consumption and smoke in the future.
☑️ Rules for successful Raffae 5 break-in
After the initial stage (about 10 hours), the proportion of the mixture can be changed to a standard 1:50, unless the instructions for the specific oil require otherwise. It is also recommended to replace the oil in the gearbox after the first 5 and 10 hours of operation, which will help remove the metal shavings that inevitably form when grinding gears. Transmission oil should be transparent after replacement.
Fuel consumption and economy
The question of motor appetite is always relevant for fishermen planning long-distance forays. Raffae 5 It's not super-efficient compared to its four-stroke counterparts, but it's a weight class that does a good job. On average, at full gas, the engine consumes about 1.8-2.2 liters of the mixture per hour. At cruising speeds (about 70-80% of the gas), the flow rate drops to 1.2-1.5 liters.
And you have to consider that the actual flow rate is very much dependent on the loading of the boat, the condition of the propeller and the hydrodynamics of the hull. If the bottom gets overgrown with algae or the screw gets chipped, the engine will run inefficiently, consuming more fuel. AI-92 gasoline And a good two-stroke oil also affects the efficiency of the engine, and cheap oil can coke, making heat sinks worse and increasing flow.
| Mode of work | Turnovers (roughly) | Mixture flow rate (L/hour) | Working time on a full tank. |
|---|---|---|---|
| Idle move | 1000-1500 | 0.4 - 0.6 | 2.5 - 3 hours |
| Cruising speed | 3000-3500 | 1.2 - 1.5 | 45-60 minutes |
| Full gas (WOT) | 5000-5500 | 1.8 - 2.2 | 30 - 40 minutes |
To save fuel and extend the life of the engine, try not to keep it at maximum speeds for a long time without needing.
Typical malfunctions and methods of their elimination
Like any technique, Raffae 5 It can be a hassle, especially if the conditions of use are disturbed. One of the most common problems is the loss of a spark. Owners often sin on a coil, but 80 percent of the time it is a spark plug or a cap. The candle needs to be twisted and checked regularly, brown scoop indicates normal operation, black indicates a rich mixture or bad oil, white - overheating.
The second common problem is that the water is not circulating, and if there is no jet coming out of the control hole, the engine needs to be immediately shut down, and the reasons can be simple: the algae in the water intake or the impeller breaks, and the winged wing is a rubber piece that tans or wears out over time. Replacement of pump The procedure is simple, but requires removal of the lower part of the lower unit.
And users also have difficulty starting. If the engine doesn't start, the algorithm is simple: is there a spark, is there fuel coming in, is there compression. Often the problem is the ruptured crankshaft oals, through which the engine sucks air, poor mixture, in which case you need to replace the oss and check the tightness of the crankcase.
Rotor selection and impact on speed
The standard screw that comes complete with Raffae 5It's a versatile solution, but not always optimal. If your boat is heavily loaded (fishermen, gear, dog), the regular propeller may not spin the engine to operating speeds (5000-5500 rpm), in which case the engine is running in "strangle" mode, leading to scorching and overheating.
For heavy boats, it makes sense to consider installing a smaller-step propeller (like a 4.5 or 5) to get the engine into mode. Conversely, for light inflaters with one person, the regular propeller can be a bit large in step, and the engine will "twist" beyond the recommended speeds. In this case, you need a screw with a large pitch, but with 5-horsepower engines this is rare, more often the problem is solved by properly loading the boat.
It's important to keep track of the blades, and even a small chip on the edge of the screw causes a strong vibration that is transmitted to the lower unit and the tran, which is not only uncomfortable, but also destructive to bearings and lower unit. Balancing the screw And the absence of damage is the key to quiet work.
⚠️ Attention: Before installing a new screw, be sure to lubricate the shaft with solidol or lithole to avoid attaching the screw to the shaft. Use only the regular veneer that comes with the kit, since its dimensions are selected for a specific shaft.
Conservation and storage tips
Seasonal storage is something that people often forget, and then wonder why the engine doesn't start in the spring. Raffae 5 In the winter, you can't leave the gasoline in the carburetor, it evaporates, leaving a resinous plaque that clogs the jellyfish, and you'd better make the fuel out of the float chamber, or if you can, shut the faucet off and let the engine stall itself.
The motor should be kept upright, and if you put it on its side, the oil residue can leak into the muffler or, conversely, leak out through the glands. The ideal option is to hang the motor on a rack or put it on a special stand. conservatism WD-40 to prevent corrosion from moist air.
Don't forget to drain the cooling system, so you can run the engine for a short time without taking water (literally for a couple of seconds) or blow the system with compressed air if you can, and the remaining water, when frozen, can split the pump body or cylinder block.
Proper preservation of the Raffae 5 engine for the winter includes: fuel drain, corrosion treatment, storage in an upright position and oil replacement in a gearbox.
Comparison with competitors and final opinion
In the face of such giants as Yamaha or TohatsuThe Raffae 5 looks like a budget Chinese, which is true, but its price tag is 2 to 3 times lower, making it the best choice for those who ride 5 to 10 times a season, it's not going to give the same smoothness and quietness as four-strokes, and it's going to have a higher vibration than the top brands, but it's going to push the boat with confidence.
The main trump card of this model is repairability. The design is so simple that with straight hands and a set of keys, you can go through the entire engine in the garage. The parts for these engines are often unified with other Chinese brands (Hidea, Parsun, Tohatsu), so finding a piston or carburetor is not difficult. Raffae 5 This is a great choice for regions where there are no official services.
So to sum up, if you want a reliable engine for fishing, and you're willing to put up with a mix and a little bit more noise to save money, you take it. If you want to have maximum comfort and silence on your budget, you'd better look at four-stroke models, but as a first engine or spare, you're a sturdy middle man.
Can I use scooter oil in Raffae 5?
It is absolutely forbidden to use scooter oil (which is often four-stroke or has other additives) in a two-stroke outboard motor. This will lead to a rapid failure of the engine. TC-W3Designed for water technology.
Which petrol is better to fill: 92nd or 95th?
For the Raffae 5 engine, as for most two-strokes, the optimal is the AI-92 gasoline. It has a higher octane number in terms of engine conditions and less additives that can form soda. AI-95 often contains alcohol that can destroy rubber seals of the carburetor.
Why does the engine smoke when it runs?
Moderate smoke (blue smoke) on the break-in is normal. It burns excess oil that is necessary for lubrication. If the smoke is black and caustic, the mixture is too rich. If there is no smoke at all, you may have put in little oil, which is dangerous.
How often do you change the oil in the gearbox?
The first oil change in the gearbox is made after the first 5-10 hours of operation (after running), then once a season or every 100 motor hours, if the oil is milky, water gets into it, you need to change the oil and oil immediately.