The question of when to start fully operating a new or refurbished engine is a concern for every owner of the craft, and the responsibility for this stage lies entirely on the shoulders of the user, because the wrong actions in the first hours of operation can irreversibly damage the mechanism. Many people mistakenly believe that modern production technologies allow you to immediately get on plane, but this is a dangerous misconception.
There is a clear technical regulation that determines the readiness of the power unit to the loads. breaking in period It's the time it takes to grind the rubbing parts of the piston group and the shaky-crump mechanism, and ignoring that process leads to overheating, bullying and loss of warranty, and only compliance with time and speed limits will allow the engine to reach its intended power.
In this article, we will discuss in detail how many hours it takes to swim at full thrust, how to properly test the engine on the barrel and what are the nuances for two-stroke and four-stroke models. carburetor The cylinders will help you avoid expensive repairs in the future.
Factory recommendations and break-in period
Manufacturers of motors, whether Yamaha, Mercury or TohatsuThe time frames for primary operation are very strict, and typically 10 to 20 hours, during which time the metal of the piston rings and cylinder walls must be "cooked" to form the perfect pairing geometry, and if you put the full load on it, the micro-nervities of the metal can cause critical overheating.
The engine operation mode in the first hours should be gentle. Kneeshaft turnaround This applies to both forward movement and idling during port maneuvers, and it is important to understand that the break-in is not only under load, but also under variable operating modes.
⚠️ Warning: It is strictly forbidden to keep the throttle in one fixed position for more than 10 minutes during the break-in. Constantly change turns to ensure uniform lubrication of all knots.
For two-stroke engines, the quality of the fuel mixture is critical. During the break-in, the concentration of oil in gasoline should be increased by 10-15% above normal.This will provide additional lubrication to the rubbing vapors that do not yet have a perfect clearance. Four-stroke motors require monitoring the oil level in the crankcase before each launch.
Checking the system on the barrel: can it be considered a swim
Many beginners wonder if the barrel motor is considered a full-fledged swim. The answer is unequivocal: no, it's just a preliminary test. The barrel run is necessary to remove the conservation lubricant, check the ignition system and monitor the operation of the operation. pumpHowever, the engine operating conditions in a water tank and in a reservoir are radically different.
When working on a barrel, there is no natural cooling of the bottom of the lower unit, which occurs when the boat moves, and you can't create exhaust backpressure on the hose or in the barrel, similar to what occurs underwater at the depth of the propeller, which can lead to malfunctioning of the carburetor or injector.
However, a barrel check is required before the first exit, which ensures that the joints are tight and that the idling is stable, and if the motor stalls or runs unevenly on the barrel, the water is strictly prohibited until the fault is corrected.
☑️ Checking the engine on the barrel
Differences in the break-in of two-stroke and four-stroke engines
Production technology dictates different approaches to preparing engines for operation. Two-stroke engines, where oil is added to the fuel, require more attention to the quality of the mixture. In the first hours of operation, it is important to avoid working on the “poor” mixture, as this leads to instantaneous destruction of the piston group.
Four-stroke analogues have a separate lubrication system, similar to the car, and they are critical for the first run, when oil must fill all channels and hydraulic compensators. Oil filter In such engines, the primary clog with metal shavings also passes, so after the first 5-10 hours of operation, it is recommended to change the oil.
- 🚤 Two-stroke motors require precise oil dosing and variable speed operation for uniform distribution of lubrication.
- 🛢️ Four-stroke engines need to control the pressure of oil and the absence of leaks from the crankshaft.
- 🌡️ The thermal regime of 4T engines stabilizes longer, so warming up before loading is mandatory for 3-5 minutes.
Modern injection systems, such as OptiMax or DFThe ECU (electronic control unit) itself will not allow to develop full power until the life of the motorcycle watch, laid in the firmware, is developed.
The first way out of the water: an algorithm of actions
The moment when you can ride a motor in a pond comes after you have successfully tested it on a barrel and refueled it with the right fuel, and the first exit must be in calm weather, without strong winds and waves, so you can focus on the instrument readings and the sound of the engine, rather than the fight against the boat.
Once the engine is started, let it warm up at idle speeds. Make sure that the control hole is a stable stream of water - this is the main indicator of the operation. impellerOnly after warming up can you start moving, smoothly opening the throttle.
First run algorithm:1. Open the fuel faucet, pump the pear.
2. Transfer the start knob to the Start position.
3. Smoothly pull the start cord.
4. Warm up 3-5 minutes on singles.
5. Start the movement at low speeds.
⚠️ Warning: Always have a spare set of candles and tools to replace them when you first go out, and unstable fuel quality can quickly disable new candles.
On your first trip, avoid abrupt jerks with a handle of gas. The engine should operate in the range of 3000-4000 rpm. This is the optimal mode for the initial laundry of the rings. If you smell burning or see smoke (for 4T engines), immediately release the gas and turn off the engine.
What to do if a water stream is missing?
If the control trickle of water has disappeared while driving, immediately turn off the motor. Movement without cooling even for 30 seconds can lead to deformation of the cylinder head and expensive repairs. Check the water intake for debris.
Operating modes and speed limit
The principle of running is to vary loads, you can't always swim at the same speed, you have to change the speed periodically, giving the engine short-term loads and again dumping gas, which helps the rings to properly distribute on the walls of the cylinder.
There's a rule for two-stroke engines that says, "Don't keep the gas going." If you have to swim slowly, you better add gas and drop it again periodically than you do it for a long time. Four-stroke engines are more stable at constant speeds, but they also have some good mode variation.
| Motor type | First 2 hours. | The next 8 hours | After 10 hours. |
|---|---|---|---|
| two-stroke | Idle + 30% gas | Up to 50% power, snatching. | Full power. |
| four-stroke | Idle + 40% gas | Up to 60% power, smoothly. | Full power. |
| Electrical. | Any regime | Any regime | Any regime |
planing during the break-in period is allowed only for a short time. Prolonged movement at maximum speeds ("full gas") is prohibited until the end of the routine work. Maximum speed It should be achieved only at the end of the break-in period and then at short distances.
Use a tachometer if it is not built into the pump. Audience control is often inaccurate, especially for beginners, which can lead to inadvertent engine overload.
Post-run maintenance
The end of the break-in period is marked by the first full maintenance, at which point you can swim on the engine without restrictions, but only after replacing consumables, the engine during laundry accumulates the largest amount of metal shavings and combustion products.
You need to replace the engine oil (for 4T) or make sure the mixture is correct (for 2T), replace the oil filter and check the condition of the spark plugs. The color of the soak on the candles will tell you about the quality of combustion of the mixture: brick shade indicates the norm, black indicates a rich mixture, white - about dangerous overheating.
It is also recommended to check the tightening of the bolts of the diewood mount and the thrust of the rampel. Vibrations in the first hours of operation could weaken the threaded joints. Lubrication of the rubbing nodes of the slits and the rotary mechanism also requires updating.
- 🔧 Replacement of oil in the gearbox (check for the presence of an emulsion).
- 🕯️ Cleaning or replacing spark plugs.
- 🔩 Stretching all visible bolt joints.
- 💧 Lubrication of the ropes and hinges of the rotary mechanism.
After the completion of the maintenance, the engine is considered fully ready for operation in any, even extreme modes. boat-engine to enter the planing with full loading.
The first maintenance after the break-in is a prerequisite for maintaining the warranty, and neglecting to replace the oil and filters cancels the manufacturer's obligations.
Can I run the engine in winter or in cold weather?
Driving in low temperatures is undesirable. The engine warms up longer and the fuel burns less efficiently, which leads to the formation of coarse gas. If the exit is mandatory, use winter fuel and increase the warming time. Water in the reservoir also affects cooling: in cold water, the motor cools faster, which can disrupt the thermal regime of laundry.
What happens if you don’t follow the scoring regimen?
Ignoring the rules of running will lead to accelerated wear of the cylinder-piston group, possible bullies, loss of compression and increased fuel consumption, in the worst case, the engine will jam in the first season, and service centers may refuse warranty repair if the oil analysis shows the presence of large chips, characteristic of work without laundry.
Do I need to change the screw during the break-in?
Some experts recommend using a smaller pitched propeller during the break-in period to make it easier to gain speed and less load. However, modern motors often do not require this procedure. If you are not sure, follow the instructions for the specific model of the engine.