Choosing a small boat outboard motor is always about balancing power, weight and cost of ownership. Hidea 18 hp.This two-stroke unit attracts the attention of owners of inflatable and metal boats with its availability and high enough traction for planing with 2-3 passengers.
Many water engines are interested in how reliable the "Chinese" assembly is and what surprises can present. Hidea HD18FWS It is worth noting that this engine is a design analogue of the popular Yamaha 15-18 hp, which makes it easier to find spare parts in the future. However, for the technology to last for many years, it is important to understand the specifics of its operation, fuel requirements and proper testing procedures.
In this article, we will discuss the technical details, service features and real-world experience of using Hidea 18. You will learn how to properly configure the carburetor, why it is important to observe the temperature regime and what nuances the ignition system has.
Technical specifications and design features
The heart of the model Hidea 18 It's a two-stroke water-cooled internal combustion engine, and it's a configuration that delivers high torque at low speeds, which is critical to the plane of a heavy boat, with a cylinder capacity of 246 cubic centimeters, and a gas distribution system that's built in a classic petal valve pattern, which increases the efficiency of filling the combustion chamber.
The design of the lower unit and gearbox is designed to work in shallow water, although it requires caution when passing overgrown areas. An important element is a lubrication system that requires a special fuel mixture, and the proportions of oil and gasoline play a crucial role in the resource of the piston group.
- 🚀 Power: 18 hp (13.2 kW) at 5000 rpm, which is the optimal indicator for boats with a length of 3.5-4.5 meters.
- ⚖️ Weight: about 36 kg (excluding fuel and oil), which makes it relatively easy to transport the engine in the trunk of the car.
- 🔄 Launch system: Hand-held (T-shaped handle), reliable and easy to maintain in the field.
- ⛽ Tank capacity: external, standard 12 liters, which provides a power reserve of up to 40-50 km at cruising speed.
⚠️ Attention: Never use pure gasoline to run the engine. The lack of oil in the mixture will cause the piston to bully and the crankshaft to jam within minutes of operation.
The cooling system deserves special attention: water is taken through the water intake at the bottom of the lower unit; the control jet ("pissoir") serves as an indicator of the health of the pump; if the jet is absent or becomes intermittent with the engine running, operation must be stopped immediately to avoid overheating.
Procedure for proper engine break-in
Running is the most critical stage in the life of a new motor Hidea 18It is during the first hours of operation that piston rings are lapped to cylinders and crankshaft bearings, and ignoring the rules of running or trying to immediately give full gas is guaranteed to lead to a decrease in compression and loss of power in the future.
The laundry process takes approximately 10 hours of production or 2-3 fuel tanks produced. During this period, it is recommended to use the mixture in a ratio of 1:25 (40 ml of oil per 1 liter of gasoline), even if the instructions indicate 1:50 for operating mode. The increased oil content will create a better lubricating film for rubbing vapors.
☑️ Hidea 18 break-in plan
The first 10 minutes of the engine is to be idling, and this is necessary to warm up all the knots and check the cooling system, and then you can move to low speed, gradually increasing the speed. It is important to avoid long-term operation at the same speed, because the modes need to be constantly changed.
In the 2 to 8 hour phase, you can run the engine at 50 percent of its power, which is enough to move around the water in a calm way, and every 10 to 15 minutes, you can open the throttle for a brief 1-2 minute period to develop the engine at high speeds, but not overload it.
Setting up the carburetor and fuel system
Carburetor in Hidea 18 It's a membrane assembly that is sensitive to fuel quality and system tightness, and factory settings are usually optimal for most conditions, but when you change altitude or air temperature, you may need to adjust, and you can adjust it with three screws: idle, low-speed mix quality, and high-speed mix quality.
If the engine stalls when a sharp throttle opens or works unstablely on singles, the proportion of the mixture is most likely broken: the "poor" mixture (lots of air, little fuel) is dangerous with overheating and burnout of the piston, and the "rich" (lots of fuel) leads to the formation of scorching on the candle and loss of power.
Symptoms of improper tuning of the carburetor
If the spark plug after work has black velvety soda, the mixture is too rich. If the soda is white or light gray, and there is overheating, the mixture is poor. The ideal color is brick and brown.
The tachometer is required to be fine-tuned, because the ear-to-mouth adjustment is not always effective, low-speed propellers are stable, high-speed propellers are highly power-controlled, and after any adjustment, be sure to check the engine temperature and candle color.
Ignition system and candle maintenance
Motor. Hidea HD18FWS It is equipped with an electronic ignition CDI (Capacitor Discharge Ignition) system that requires no adjustment of the gap and is highly reliable. However, the state of the spark plug remains a key factor in stable spark formation.
Regular check of the gap between the electrodes of the candle is a mandatory procedure. The optimal gap is 0.7-0.8 mm. Too large a gap can lead to failure of the insulator or coil, especially in wet weather, and too small - to a weak spark and poor ignition of the mixture.
When you're in service, pay attention to the state of the high-voltage cap, which should sit tightly on the candle and not have cracks, and getting water into the candle channel is a common problem that can be prevented by lubricating the candle thread with graphite lubrication and tightly twisting the cap.
Reductor and Daydwall: Lubrication and Care
The bottom of the motor, or diewall, contains a gearbox that transmits rotation from the crankshaft to the propeller, and inside the gearbox is a special transmission oil, and its level and condition must be checked before each season and after every 50-100 hours of operation.
The oil in the gearbox changes through the bottom drain hole, and it's important to remember the rule that the new oil is pumped from the bottom until it starts to flow out of the top control hole, which ensures that the old oil is completely displaced and there are no air traffic jams.
| Parameter | Value/Requirement | Frequency |
|---|---|---|
| Type of gearbox oil | SAE 90 / API GL-5 | Replacement |
| Oil volume | 0.32 litres | Controlling |
| Oil replacement | First time after 20 m/h | Every 100 m/h |
| Slitz lubricant | Lithium lubricant | Every 10 m/h |
When changing the oil in the gearbox, always use new sealing washers on the drain plugs. Old washers can deform, causing water to enter the gearbox and costly repairs.
Visual inspection of the lower unit is also important, because the presence of an emulsion (white foam) in the oil being drained indicates that water is entering the glands, and the operation of a motor with damaged glands is strictly prohibited, as this leads to the destruction of bearings and gears.
Typical malfunctions and methods of their elimination
Even the reliable Hidea 18 It can be a problem, especially if you're in trouble, and most often, owners have a problem starting or losing power, and understanding the causes allows you to quickly fix the problem on your own without having to go to the service.
If the engine doesn't start, the first thing to do is check for sparks and fuel, and often the problem is a contaminated carburetor's jelly or a fuel-filled candle, and in these cases, the system's purging and the candle drying help.
- 🔥 The engine is warming up: Check the water intake for algae, make sure the integrity of the impeller pump and the presence of a control jet.
- 📉 Power drop: Clean the candle from the sodium, check the fuel filter for water or dirt, make sure the tightness of the fuel hoses.
- 💨 Smoke exhaust: Most likely, the proportion of the oil mixture is broken (too much oil) or the exhaust system needs to be cleaned.
⚠️ Attention: If the engine stops starting after you hit the water, don't try to spin it with a starter. First, remove the candles, blow out the cylinders and replace the oil to remove the water from the crankcase.
Frequently Asked Questions (FAQ)
What is the best octane number for Hidea 18?
The use of fuel with a higher octane number (AI-95) does not give advantages and may even worsen the engine performance due to later ignition, if the carburetor is not specifically tuned for it, the main thing is the freshness of the fuel.
Can I keep a motor with a full tank of gasoline?
Long-term storage (more than 1 month) with a full tank is not recommended, since gasoline oxidizes and loses its properties, forming a resinous plaque in the carburetor. It is better to generate fuel from the float chamber, letting the engine stall itself, or use fuel stabilizers.
Which propeller is better for Hidea 18?
The state screw has a pitch of 10 inches. For heavy boats or full loads, it makes sense to consider propellers with a reduced pitch (9 inches), which will increase thrust at launch but reduce top speed. For light boats, you can try 11 inches pitch for fuel economy at cruising speeds.Do I need to lubricate the fuel hoses?
Yes, the connection of fuel hoses with the tank and carburetor is recommended to periodically check and, if necessary, lubricate with silicone lubricant to prevent rubber drying and air entering the system, which causes "suction" and unstable operation.
Timely change of oil in the gearbox and use of high-quality fuel mix are two main factors determining the life of the Hidea 18 engine by 90%.
In summary, it can be said that Hidea 18 It's a robust and workable tool for the fisherman or the tourist, and it doesn't forgive the negligence of fuel and cooling, but it can work hundreds of hours with proper care, and following the running instructions and regular maintenance will allow you to enjoy the water walks without unexpected breakdowns.