Nowadays, no matter what industry we are in, we have all become mechanized. For example, in agriculture and landscaping, machines can save us time and labor. Let's take a look at lawn mowers, which are mechanical tools used to trim lawns, vegetation, etc. The output shaft of the engine is equipped with blades, which use the high-speed rotation of the engine to improve the speed and save time for lawn mowers, Reduced a significant amount of human resources. But lawn mowers can also encounter various problems after being used for a long time. So today, let's talk about it for everyone.
1. Lawn mowing weakness
Remove and clean the air filter. If it cannot be cleaned, replace it. Check if the blade is sharp, and if it is dull, it needs to be polished. In addition, whether the lawn has long and dense leaves, if so, the mowing size should be increased to reduce the load on the engine.
2. What are the failure reactions of the engine if the oil is changed irregularly?
As the working time of the engine increases, the amount of dissolved waste in the engine oil will gradually increase, and the color of the engine oil will gradually deepen to black, resulting in a decrease in lubrication function. If the oil is changed irregularly, the lubrication function of the oil will gradually decrease, leading to excessive oil consumption, premature engine wear, loss of power, until the connecting rod breaks and the engine is scrapped. The oil change time should be 50 hours. If the engine operates in a high temperature or dusty environment, the oil change time should be around 25 hours, or it can be determined by the color of the oil in the oil chamber.
3. Gasoline engine connecting rod fracture or simultaneous cylinder block fracture
Fault manifestations:
The contact surface between the crankshaft and connecting rod is stuck. There are scratches on the surface of the connecting rod in contact with the crankshaft.
Cause of malfunction: Lack or absence of lubricating oil, causing high temperature melting and pulling of the contact surface (inner surface of connecting rod or even crankshaft surface).
Fault analysis:
Not adding lubricating oil (gasoline engine oil), or adding lubricating oil but not in place, or adding lubricating oil but not in place but the machine is used at an improper angle, causing oil splashing and the wheel not coming into contact with the oil, resulting in a lack of lubricating oil or a lack of lubricating oil on the contact surface between the crankshaft and connecting rod, leading to a lack of lubrication on the contact surface; The second is no cooling. Under normal circumstances, if it is at the rated operating speed, the crankshaft and connecting rod will bite due to the above reasons within a few minutes, causing the connecting rod to break and crack the cylinder block.
Adding counterfeit and inferior engine oil can also cause the above-mentioned problems.
Analysis basis:
(1) All internal combustion engines, crankshaft and connecting rod jamming (or locking) is caused by a lack of oil;
(2) Sometimes, if the machine damaged by the user does not have any signs of debris in the oil stored, it indicates that there is no oil during operation or the amount of oil is too low for the splash wheel to reach, or the oil in the machine was added after an accident occurred. The oil added afterwards did not participate in lubrication, so it is still clear and free of debris (the oil is gray black);
(3) There is also a situation where, although there is enough oil, when used on slopes greater than 25 degrees, the excessive inclination angle can cause oil splashing and the wheels cannot reach the oil, resulting in the above-mentioned faults or other component pulling (or locking), accelerated wear.
4. Engine roughness
The throttle is in the high position and the air damper is in the open state; Loose spark plug wires; Water and dirt entering the fuel system; The air filter is too dirty; Improper adjustment of carburetor; Loose engine fixing screws; The engine crankshaft is bent.
Troubleshooting method: Lower the throttle switch; Press the outer wire of the spark plug firmly; Clean the fuel tank and refill with fuel; Clean the air filter or replace the filter element; Readjust the carburetor; Check the engine fixing screws after turning off the engine; Correct the crankshaft or replace it with a new one.
5. The engine cannot shut down
The installation position of the throttle cable on the engine is appropriate; The throttle line is broken; Inadequate throttle activity; The ignition cord should not be in contact.
Troubleshooting method: Reinstall the throttle cable; Replace the new throttle cable; Drip a small amount of engine oil into the active position of the throttle; Check or replace the ignition wire. As a good helper for agricultural production and prosperity, agricultural machinery not only needs to be able to choose and maintain, but also needs to be operated, maintained, and maintained correctly.
6. Unable to start in spring
If the maintenance is not good after winter and the engine cannot be started in spring, the reasons and countermeasures are as follows:
(1) It is possible that the fuel tank has not been drained for the first year, so check if the fuel is qualified fresh oil.
(2) Its function is to discharge the pulse high-voltage electricity sent by the high-voltage wire (flame nozzle wire), breakdown the air between the two electrodes of the spark plug, generate electric sparks, and ignite the mixed gas in the cylinder. Many instances of unstable idle, shaking, poor acceleration, and insufficient power result in frequent self stalling during idle, leading to increased fuel and gas consumption. This is caused by damage to the spark plug. If the spark plug is dirty and can be cleaned, it is severely damaged and needs to be replaced with accessories of the same model. If ignition is not possible, the spark plug electrode gap can be adjusted, which is 0.6-0.9mm in winter and 0.9-1.0mm in other seasons;
(3) If the fuel of the gasifier was not burned out before it was discontinued last year, the gasifier should be cleaned (it must be cleaned by a professional);
(4) Send the lawn mower engine carburetor to a professional store for repair.
Everyone must regularly maintain the lawn mower to reduce various malfunctions. In addition, if the lawn mower malfunctions and cannot be resolved on its own, it is necessary to contact after-sales service for assistance.