1.muffler blue smoke

Reason: Organic oil participates in the burning.

Remedy: After the fault is found, check the oil dipstick first to see if the oil is excessive, such as excessive. If the excess oil is drained and then run for another ten minutes, if the fault is still not eliminated, the engine needs to be overhauled.

2. mowing grass weakness

Remove the air filter and replace it if it cannot be cleaned. Check that the blade is sharp and if it is blunt, it needs to be sanded. In addition, whether the lawn is thick and thick, if it is, the size of the grass should be increased to reduce the load on the engine.

As shown in Figure 8, the drawstring has a rebound when starting.

The ignition timing is the cause of the failure. Usually because the blade hits a hard object when cutting grass, the flywheel key is cut. At this point, the faulty machine should be overhauled.

3.self-propelled clutch pieces are easy to wear

During the use of the hob mower, because the operator does not operate according to the operation, the self-propelled method is often controlled by clicking, thereby increasing the wear of the clutch piece and finally invalidating the self-propelled clutch, so the hob is mowing. When the machine is in use, be sure to put the self-propelled handle in place at one time.

4. lawn mowers are not well drained

Reason: The engine speed is too low, the grass blocks the grass, the grass is too humid, the grass is too long, too dense, and the blade is not sharp.

Remedy: Remove the grass from the lawn mower. After the lawn has water to be dried, cut it again. Cut it twice or three times. Cut only 1/3 of the grass length each time and sharpen the blade.

5. overheated damage

The skirt is dry white or light gray, and when it is severe, there is a local loose bulge on the surface of the porcelain tube. The electrode is obviously ablated, and there is a circle of ablation at the proximal end of the center electrode, and there are tumor-like particles adhering. The flammable gas is too thin, the spark plug has a low calorific value or leaks, and if the ignition is too early or the gasoline engine is overheated, it will cause overheating and burning.

6.carbon deposition fouling

It is recommended to hire professional maintenance personnel to overhaul each mower every year before starting the grasshopper for the first time every year. The main items for early maintenance are: cleaning the carburetor, cleaning the carbon deposit in the combustion chamber, and checking whether the high-voltage line is unblocked. Whether the gearbox is working properly, etc.