Choosing an outboard motor for a lightweight inflatable boat or a small aluminum boat is always about finding a balance between power, weight and cost. outboard motor Arrow 5 It has become one of the most talked-about options in the budget segment, attracting the attention of fishermen and water lovers with its accessibility, a two-stroke unit often seen as an alternative to more expensive Japanese or American counterparts, especially when it comes to boats with displacement hulls.
Owners of small boats are often looking for a reliable engine that can confidently bring the boat to plane with minimal load. Arrow 5 It is positioned as a universal solution for PVC boats from 2.8 to 3.6 meters long, but like any entry-level equipment, it requires competent initial setup and proper maintenance for stable operation.
In this article, we will discuss in detail the design features of the engine, find out the real fuel consumption and discuss the nuances of operation, which are often silent in advertising brochures. carburetor and running rules will help you avoid common mistakes that can lead to premature failure of the engine.
Technical specifications and design features
The engine is a classic two-stroke, forced water-cooled design, with 5 horsepower achieved at a certain number of revolutions, making it suitable for traveling at speeds up to 25-30 km/h depending on the weight of the boat and passengers. working-roomThe 98 cubic centimeters is the standard for this power class.
The ignition system here is electronic, which saves the owner from the need to constantly adjust the gaps of candles, as it was in the old magdino-contact systems. transom mounting The engine can be quickly installed on the boat, and the presence of a gearshift system (forward/neutral) adds convenience when maneuvering in narrowness. The weight of the unit in running order is about 19-20 kilograms, which allows it to be transported in the trunk of a passenger car without the use of special trolleys.
Details of gearbox design
The gearbox is made in a separate case and attached to the lower unit, and there is one pair of gears inside, and the lubrication is done with transmission oil, which is recommended to be replaced after every 50 motor hours or at the end of the season.
It's worth noting the presence pulp The exhaust system is organized through the exhaust window in the sleeve and then through the propeller hub, which reduces the noise somewhat, although the two-stroke nature of the work still gives off a characteristic sound.
- ⚓ Engine type: two-stroke, single-cylinder
- ⚓ Cooling system: off-shore water (flowing)
- ⚓ Fuel mixture: AI-92 gasoline and oil for two-stroke engines
- ⚓ Fuel tank capacity: built-in (usually 1.2 liters) or external
Power supply system and fuel mixture preparation
The key to stable operation is to properly prepare the fuel mixture, because the engine is two-stroke, it does not have a separate lubrication system for the crank-shaft mechanism, so oil is added directly to the gasoline. break-in It is recommended to use a ratio of 1:25, that is, 40 ml of oil per 1 liter of gasoline, this provides enhanced lubrication of rubbing parts when laundry.
After the first 10 liters of fuel or 5-10 hours of work, you can switch to a standard mixture of 1:50 (20 ml of oil per 1 liter of gasoline). coking It is recommended to use special oils labeled TC-W3, intended for water technology, as they burn better and pollute candles less.
Use only fresh gasoline. Fuel that has been in the canister for more than 2-3 months loses its octane properties and can lead to detonation or difficult start.
The PZ carburettor or its analogues require clean fuel. It is recommended to install an additional fuel filter fine cleaning between the tank and the motor, if the design does not provide an integrated mesh element of sufficient capacity. The quality of the mixture is adjusted by the screw on the carburettor body, but the factory settings are usually optimal for most operating conditions.
⚠️ Warning: Never run the engine without water! The operation of the water pump "dry" will instantly disable the osteoils and can cause deformation of the impeller, which will lead to overheating of the engine.
The breaking in process: rules and stages
Running is the most important stage in the life of a new motor, on which its life depends, and many beginners ignore this process, immediately starting to operate the equipment at full power, which is a grave mistake. First launch It should be produced on a stand or in water, but with the necessary temperature control. During the first 30-40 minutes of operation, you need to keep the speed in the range of 2000-2500 per minute, without giving full load.
Then there is the cycle of variable loads. During the next few hours of operation (total up to 10 motor hours), you should alternate low-speed work with short-term outputs to a mode that is 70-80% of the maximum power. Full gas. during the break-in period, it is strictly forbidden to give, as this can cause overheating of the not yet grated parts of the CPG (cylinder-piston group).
☑️ Steps of proper breaking in
After the break-in procedure is completed, maintenance is required: replace the oil in the gearbox, check the tightening of all bolt joints, especially the fastening of the diewood leg and the hummel, and clean the spark plug from the soak, which will identify possible leaks or weakening of the fastener due to vibration and thermal expansion.
| The break-in stage | Time to work. | Loading mode | Proportion of mixture |
|---|---|---|---|
| Warming up | 5-10 minutes | Idle move | 1:25 |
| Initial. | 1 hour | Up to 50% capacity | 1:25 |
| Basic | 5-8 hours | Up to 70-80% power | 1:25 -> 1:50 |
| Finals. | After 10 hours. | Full power. | 1:50 |
Control and maneuverability on water
The motor is controlled by a humming wheel with a gas handle and a stop button on the handle, and by turning the gas handle, you adjust the angle of opening the carburetor's throttle.
When reversing (reverse mode) you should be especially careful, since the stops of the bumper may not have a clear fixation, and a sharp jerk can lead to an unexpected change in course. Cable gasIf it is installed in the modification, it allows you to place the tank in the bow of the boat for better weighting, which is especially important for inflatable vessels.
When mooring or approaching shore, experienced water-engineers recommend converting the engine to neutral in advance, using the inertia of the vessel. This avoids sudden jerks and gives time to react in case of unforeseen circumstances. It is also worth noting that at low speeds the engine can operate unstable if the carburetor is not perfectly tuned, so slow trolling sometimes requires additional adjustment of the screw quality of the mixture.
Typical malfunctions and methods of their elimination
Like any technique, Arrow 5 It can cause some problems in operation, and one of the most common reasons for failure is to contaminate the spark plugs or disrupt the fuel supply, and if the candle is wet and smells like gasoline, it's a "overflow" and you have to blow the cylinder out by twisting the candle, and if the candle is dry, it's a problem in the fuel system.
Overheating of the engine is often associated with contamination of water intake holes or damage to the impeller pump. In water bodies with a large amount of algae or in shallow water, you need to constantly monitor the control jet of water coming out of a special hole. The absence of a jet is a signal to immediately stop the engine.
⚠️ Warning: If the motor starts to make a ringing metal knock or the thrust drops sharply, immediately turn off the engine. Continued operation can lead to a turn of the rod tab or a cylinder bully.
Vibration at high revs may indicate an imbalance of the propeller or the entry of a foreign object (swings, grass) on the shaft. Regular visual inspection (inspection) of the lower unit part after each sortie will help to avoid serious breakdowns. To lubricate the gearshifting cable and rotary mechanism, use waterproof lithium lubricant.
90% of the problems with starting two-stroke engines are related to the quality of the fuel mixture or the state of the spark plug. Always have a spare candle on board.
Cost-effectiveness and conclusions
Fuel consumption is one of the main parameters of interest to owners. For a 5 hp engine, the average consumption is about 1.5 - 2.0 liters per hour when driving at half-strength, which is quite acceptable for long-distance transitions. At maximum speeds, the flow can increase to 2.5 liters, but in this mode the engine works for a short time.
In summary, it can be said that boat-engine Arrow 5 It's a decent budgeter that, if properly maintained, can last for several seasons, ideal for fishing, hunting or cruising short distances, and the main advantage of the model is its simplicity of construction, which makes it easier to repair and maintain yourself even in the field.
Buying such a unit requires a responsible approach to primary running and regular maintenance. If you follow all the recommendations of the manufacturer, this engine will become a reliable assistant on the water, providing mobility and independence from the current or wind.
Which gasoline is best used for Arrow 5?
It is recommended to use gasoline brand AI-92 with an octane number of not less than 90. the use of AI-95 is possible, but does not give significant advantages for engines of this degree of compression, and in some cases can lead to earlier burnout of valves (although in two-stroke valves there are no valves, but the risk of detonation at a low quality 95-m higher due to alcohol additives).
How to store the engine in winter?
For winter storage, you need to fully develop fuel from the carburetor (let the engine stall itself, blocking the crane), drain water from the cooling system (few times turning the engine in air), lubricate the cylinder with oil through the candle hole and store it in a vertical position in a dry room.
Can I put Arrow 5 on a boat 4 meters long?
Technically, it's possible to set it up, but the efficiency is low. For a boat that's 4 meters long and over 1.5 meters wide, 5 hp power won't be enough to go plane, especially with two passengers. The boat will move in displacement mode at 6-8 km / h, which is acceptable for quiet fishing, but not for fast crossings.