Reasons why small gasoline generator cannot start

Reasons why small gasoline generator cannot start

Theoretically, if the correct starting method is repeated three times, the small gasoline generator still cannot start successfully. The possible reasons are as follows:

1) There is no oil in the fuel tank of the small gasoline generator or the oil line is blocked; the oil line is partially blocked, making the mixture too thin. Or the mixture entering the cylinder is too rich due to multiple starts.

2) The ignition coil has problems such as short circuit, open circuit, moisture or poor contact; improper ignition time or wrong angle.

3) Improper spark plug gap or leakage.

4) The magnetism of the magneto becomes weak; the platinum of the breaker is too dirty, ablated, and the gap is too large or too small. The capacitor is open or short-circuited; the high-voltage line is leaking or falling off.

5) Poor cylinder compression or air ring leakage

Supplementary knowledge

‌The main causes of spark plug leakage in small gasoline generators include excessive gap, ceramic insulator problems, and ignition coil (or cylinder liner) rubber sleeve problems. ‌

‌Excessive gap‌: When the gap of the spark plug is too large, the breakdown voltage will increase, causing the ignition ability of the spark plug to decrease, thereby affecting the performance of the engine.

‌Ceramic insulator problem‌: The ceramic insulator of the spark plug may have conductive stains due to stains or oil leakage during installation. In addition, if the vehicle condition is abnormal, resulting in a large amount of carbon deposits on the small ceramic head, or if the gasoline contains metal additives that cause residues to adhere to the ceramic head, it will also cause flashover ignition of the ceramic head.

‌Ignition coil (or cylinder liner) rubber sleeve problem‌: The ignition coil (or cylinder liner) rubber sleeve ages due to high temperature, and the inner wall cracks and breaks down, which may also cause spark plug leakage problems.

In order to avoid spark plug leakage problems, spark plugs need to be checked and replaced regularly. If the spark plug is found to be leaking, it should be replaced in time. In addition, you can also take some preventive measures, such as keeping the vehicle clean, changing the oil regularly, avoiding the use of low-quality gasoline, etc., to extend the service life of the spark plug‌

‌The causes of gas ring leakage in small gasoline generators mainly include the following points‌:

 There are three possible leakage gaps in the gas ring: including the gap between the ring surface and the cylinder wall, the side gap between the ring and the ring groove, and the open end gap. The existence of these gaps will cause gas leakage and affect engine performance‌

 ‌Piston ring groove wear‌: The wear of piston ring groove mainly occurs on the lower plane of the ring groove, which is caused by the up and down impact of the gas ring and the radial sliding of the piston ring in the ring groove. Wear will reduce the sealing effect of the second sealing surface and cause air leakage‌

 ‌Piston ring wear‌: The material of the piston ring does not match the cylinder wall (the hardness difference between the two is too large), resulting in poor sealing after the piston ring wears, thus causing air leakage‌

 ‌The opening gap of the piston ring is too large or the filing does not meet the requirements‌: The opening gap of the piston ring is too large or the filing does not meet the requirements, which will make the gas sealing effect of the ring worse, the throttling effect will be reduced, and the air leakage channel will be enlarged. . The opening clearance of diesel engines is generally larger than that of gasoline engines, and the first ring is larger than the second and third rings‌

 ‌Irrational distribution of piston ring openings‌: In order to reduce air leakage, it is necessary to strengthen the throttling effect at the ring opening to make the ring's gas sealing route longer. The opening position of each gas ring should be operated as required to ensure effective sealing‌

Forces when the engine is working‌: When the engine is working, the various forces acting on the ring balance each other. When it is in a floating state, it can cause radial vibration of the ring, causing the seal to fail. At the same time, there may also be circular rotation of the ring, which will change the staggered angle of the opening during installation, causing air leakage‌

 ‌The piston ring is broken, glued, or stuck in the ring groove‌: The piston ring is broken, glued, or stuck in the ring groove, or the piston ring is installed backwards, which will cause the first sealing surface of the ring to lose its sealing effect and cause air leakage. . For example, twisted rings and tapered rings that are not installed in the ring groove as required will also cause air leakage.

 ‌Cylinder wall wear or marks or grooves‌: Wear or marks or grooves on the cylinder wall will affect the sealing performance of the first sealing surface of the gas ring, leading to air leakage‌

Understanding these reasons will help you take appropriate measures to prevent and solve the problem of air ring leakage and ensure the normal operation of the engine.