Choosing a reliable power plant for a small vessel is always a search for a balance between power, weight and economy. Honda's outboard motor 50 For years, it has been a leader in the mid-power sector, offering PVC boats and small boats a time-tested solution, and Japanese engineering has put maximum efficiency into the engine, making it the benchmark for the 50 horsepower class.
Many aquatic motorists choose this model for its legendary unpretentiousness to fuel quality and ability to operate in the harshest conditions. Unlike many competitors, the engine from Honda is famous for its durability and stable traction at all speeds. Honda BF50 It will be an excellent choice for both professional fishermen and lovers of family holidays on the water.
In this article, we will discuss in detail the technical features, real consumption figures and nuances of operation so that you can make an informed decision about buying. Understanding the specifics of the operation of this unit will allow you to avoid common mistakes and prolong the life of the equipment.
Technical specifications and design features
At the heart of this model is a four-stroke inline 732 cubic centimeter internal combustion engine, which delivers excellent low-speed traction, which is critical when trolling or driving against a strong current. Power 50 hp. It is achieved at 6,000 revolutions per minute, which is the de facto standard for this class of technology.
The SOHC (one camshaft in the cylinder head) is a time-tested scheme that minimizes the number of moving parts and reduces the risk of mechanical failure, and the intake manifold is made of aluminum alloy, which helps to better cool the fuel-air mixture and improves the efficiency of combustion.
The cooling system is forced, water-controlled, thermostatic, which means that the engine reaches its operating temperature faster and maintains its optimal thermal regime for longer, even under partial loads. Honda 50 hp It is equipped with electronic ignition CDI, which does not require adjustment of gaps and provides a stable spark in all weather conditions.
A unique feature is the PGM-IG (Programmed Ignition) system, which automatically adjusts the ignition advance angle depending on the load and engine temperature. This allows you to squeeze the maximum performance without the risk of detonation.
⚠️ Warning: When operating in salt water, be sure to use fresh water to flush the cooling system after each outlet, as the block head aluminum alloys are sensitive to corrosion.
The overall dimensions and weight of the unit are also optimized for installation on boats ranging from 4 to 6 meters in length, the dry weight of the engine is about 84 kg, which is an average, but is compensated by the reliability of the design. The transom height varies depending on the modification, allowing you to choose the option for a particular type of vessel.
Before buying, be sure to measure the height of your boat’s transom to choose the right length of the lower unit (S, L or XL), otherwise the engine efficiency will decrease significantly.
Economy and fuel consumption
One of the main arguments in favor of buying a Japanese unit is its fuel efficiency. fuel At full gas, it is about 18-20 liters per hour, but in cruising mode this figure drops to 8-10 liters. For comparison, two-stroke analogues of the same power can consume 30-40% more gasoline.
The carburetor power system, although seemingly archaic in the injector era, is highly reliable and maintainable in the field, less demanding on the octane of gasoline, which is important for remote regions, while the exhaust gas recycling system helps reduce emissions toxicity.
The fuel tank is typically 25 litres as standard, providing a range of about 2-2.5 hours of active plane, and many owners install additional tanks to increase autonomy.
- 🛥️ Cruising speed (3500 rpm) - consumption of about 9 liters per hour.
- ⛽ Maximum power (6000 rpm) - consumption up to 20 liters per hour.
- 🐟 Trolling mode (1000-1500 rpm) - consumption of less than 2 liters per hour.
- 📉 The savings compared to two-stroke motors are up to 35%.
It's important to understand that the actual flow rate depends on a variety of factors: boat weight, propeller condition, reservoir hydrology and driving style. A properly selected propeller pitch can reduce fuel consumption by 10-15%.
Comparison of the Honda BF50 and Yamaha F50
In the outboard market, the eternal battle between Honda and Yamaha remains a battle, both offering great four-stroke solutions, but each has its own nuances. Yamaha F50 It is often praised for slightly higher top speeds on light boats thanks to an optimized exhaust system.
However, Honda BF50 Honda's Japanese engineers have been betting on smoothness, which is highly prized when fishing in silence, and Honda's cooling system is considered more efficient when operating at high speeds for long periods.
| Parameter | Honda BF50 | Yamaha F50 |
|---|---|---|
| Engine capacity | 732 cc. | 732 cc. |
| Weight (dry) | 84 kg | 86kg |
| Launching system | Electrical starter | Electrical starter |
| Guarantee | 2-5 years (depending on the dealer) | 2 years |
| Feature | PGM-IG ignition | Micro-injection (in new versions) |
When choosing between these two brands, having an authorized service center in your area often becomes the deciding factor, and the availability of spare parts and the skill of the craftsmen can outweigh the scales in one direction or another.
⚠️ Note: Do not try to force the engine by reconfiguring the carburetor without the appropriate knowledge - this will lead to overheating of the piston group and loss of warranty.
Oil maintenance and replacement
Regular maintenance is the key to a long life for your child boat-engineThe first oil change must be made after the first 20 hours of running in order to remove the metal shavings formed when grinding the parts, then the procedure is repeated every 100 hours or once a season.
To change the oil in the crankcase, the engine needs to be warmed to operating temperature so that the oil becomes more fluid, then the exhaust is drained through the drain hole located at the bottom of the crankcase, and it is recommended to use a pump to pump the oil through the probe if the drain hole is difficult to access.
☑️ Checklist for the season
The gearbox changes oil less often, usually every two seasons or every 200 hours, and it's important to watch the color of the oil, because if it's milky, it means that the seals are broken and the gearbox gets water, and then you need to repair it immediately.
The spark plug should be inspected every 50 hours; black ignition indicates a rich mixture; white indicates poor or overheating; and the normal color of the insulator is light brown or brick.
What oil should I put in the gearbox?
Use only specialized transmission oils for outboard motors labeled API GL-4 or GL-5. Automotive oils may contain additives that destroy non-ferrous metal gear gears.
Selection of screws and setting up for the boat
The right propeller choice has a direct impact on acceleration dynamics, top speed and fuel consumption. The standard propeller that comes with the kit is a compromise solution. Lightweight PVC boats with a length of 4-4.5 meters often require a large-step propeller to prevent the engine from "twisting".
Heavy metal or composite boats, on the contrary, may require a propeller with a reduced pitch, which will allow the engine to more easily get on plane and operate in the optimal range of revolutions. Aluminum screws They're cheaper, but when they hit an underwater obstacle, they bend, protecting lower unit.
If you notice that the engine does not develop maximum speeds (less than 5500-5800 rpm) with a fully open throttle, then the screw pitch is too large. If the revolutions exceed 6200-6300, the screw should be changed to a heavier one (with a larger step), otherwise there will be a risk of damage to the valves.
- 🔩 Aluminum screws are cheaper, easier to repair, but less efficient.
- 🚀 Stainless steel screws are more expensive, provide better speed, but when hit, they can damage the gearbox.
- 📏 The propeller step is selected experimentally for each boat.
Also worth paying attention to the condition of the lower unit. Regular lubrication of topping up joints and checking the tightening of the screw nut will help to avoid losing the screw on the go.
Optimal revs for cruising speed on the Honda BF50 are in the range of 4500-5000 rpm – here the best balance of speed and fuel consumption is achieved.
Typical malfunctions and methods of their elimination
Despite its high reliability, Honda 50 outboard motor It can cause problems when you're not operating properly, and one of the problems that we have is having trouble starting after a long period of downtime, and most often it's because of the fuel system, which is clogging up the carburetor's jellybars or losing the elasticity of the fuel hoses.
Overheating of the engine can be caused not only by a malfunction of the pump, but also by a banal clogging of the water intake with grass or sand. Before each trip, visually check the control jet of water. No jet is a signal to immediately stop the engine.
Problems with gear shifting (front/neutral/reversing) are often associated with improper adjustment of the switching cable or wear of the friction clutch linings. The adjustment of the cable requires accuracy and must be carried out according to the manual.
⚠️ Attention: If the motor stalls with a sharp addition of gas, check the condition of the fuel filter-sludge and diaphragms in the fuel pump - they could coarse from time to time.
Frequently Asked Questions (FAQ)
Which petrol is better to fill in the Honda BF50: 92 or 95?
The manufacturer recommends using unleaded gasoline with an octane number of at least 92 (according to the research method), pouring 95th gasoline will not give an increase in power, but will not harm the engine, the main thing is the freshness of the fuel and the absence of ethanol (ethanol) above 10%.
How many hours does the Honda 50 outboard motor run before overhaul?
If you follow the maintenance regulations and use high-quality fuels, the engine life before the first serious intervention is 2000-3000 motor hours. In amateur operation, this is 10-15 years of active service.
Can I transport the motor on the side?
Short-term transport on the side is permissible, but only on a certain side (usually the left side, if viewed from the side of the hummel, but it is better to specify in the instructions of the particular model). Prolonged storage or upside-down transportation is strictly prohibited - oil will flood the cylinders.
Do I need to dilute the oil with gasoline?
Nope! Honda BF50 It's a four-stroke engine, and the oil is put in the crankcase separately, and the tank is filled with pure gasoline, and mixing the oil with the gasoline will cause the engine to fail quickly.