How many amps does an automotive starter draw?



How many amps does an automotive starter draw?

A good starter will normally draw 60 to 150 amps with no load on it, and up to 250 amps under load (while cranking the engine). The no-load amp draw will vary depending on the type of starter. If the amp draw is too high, the starter needs to be replaced.

How many amps does a car starter motor use?

A starter motor from a normal 2 Litre petrol car draws between 60 and 200 Amps when turning over the engine when the oil is warm and thin. Under winter conditions, this current can easily double when the oil is thick. Diesel engines have a very high compression ratio e.g. 22:1 and require more powerfull starter motors.

How many volts should be going to the starter?

The dial reading should be 12 volts or more. Work the starter switch, and the reading should fall, but not below 10.5 volts. If the reading does not fall, there is a fault in the ignition-switch circuit or in the solenoid. If the reading falls below 10.5 volts and the starter turns slowly or not at all, the battery is probably flat.

How many amps does the starter use?

A starter motor in good condition with no load on it should run at about 20 to 30 Amps at a very high speed. The back EMF will be high hence a low current is drawn from the battery.