1. The drive gear of the starter motor does not rotate and cannot work normally.
When this happens, which is usually caused by comparison, it is possible that damage to the battery, the kinetic energy is insufficient, caused by damage to the battery to the starter parts circuit, it is possible that the starting switch contact plate of ablation, engine resistance is too large, or the direct damage caused by the starter.
When confronted with this situation, we first need to preliminarily diagnose the reason why we cannot start up, so that we can deal with it accordingly. If the line is damaged, repair it. If the battery is broken, replace it. If the contact plate of the starting switch is ablated, the engine resistance is too high or the starting machine is burned directly, the corresponding maintenance point shall be taken care of.
2. Insufficient power output of starter, unable to drive crankshaft.
When this happens, the starter is in motion, but the motion is slow and cannot drive the crankshaft. The main reason is that both short circuit of excitation coil and battery loss can lead to insufficient starter power.
3. After starting to switch, starter at high speed and can't start the engine, the reason of this kind of circumstance appeared on the transmission mechanism, it is possible that drive gear or one-way clutch wear.
4. The starter operates in a harsh voice.
This situation may well be caused by a dead one - way clutch or improper starter installation. First shake the crankshaft at an Angle, then switch on the starting switch for test. If the collision sound disappears and the engine robs into the starting engine, it indicates that the rodent end of part of the flying gear ring is damaged and should be replaced.
(1), such as crankshaft turn to any Angle can't eliminate the crash, drive pinion never meshes into, indicates fork trip or electromagnetic starter switch trip too short, lead to drive pinion has not yet been meshes into the high-speed rotation.
(2), when turn on the starting switch, starter shell jitter, obviously that starter fixed bolt looseness or clutch housing fixed screw nail, fastening should be immediate, otherwise may cause the starter drive end cover broken.
And, depending on the characteristics of the impact, the cause can be roughly determined. General with idle stroke adjustment improper or bump is continuous, and starter fixed bolt looseness or clutch housing or fly tooth damage caused by sound is intermittent, and can approach action when starting. The diagnosis method of idling with percussion is the same as that of the starter.