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starter solenoid

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CardinalNSB(at)aol.com
Guest

Posted: Sat Jul 06, 2013 4:11 pm Post subject: starter solenoid

So, I understand that the solenoid needs to make its mechanical travel so  the teeth are engaged, before the high current is sent to the starter.   That is why the high current to the starter doesn't connect until the plunger is  extended.  Thanks Skip

 [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Jul 06, 2013 7:42 pm Post subject: starter solenoid

At 07:01 PM 7/6/2013, you wrote:

  	  Quote: 	
		   So, I understand that the solenoid needs to make its mechanical travel so the teeth are engaged, before the high current is sent to the starter. 	


    Yes . . . current available from the FAT wire . . .



  	  Quote: 	
		    That is why the high current to the starter doesn't connect until the plunger is extended.  Thanks Skip 	


    The "high current" we have been discussing is that

    which flows into the SMALL terminal on the solenoid/

    contactor assembly. Current that normally comes though

    the START switch on the panel.



    This current starts out high . . . ~30A to effect rapid

    and positive engagement of the pinion gear. Only when

    the contacts close and energize the starter motor does

    the contactor coil terminal current FALL to the LOWER

    holding value on the order of 10A.



    All this fussing over external contactors or boost relays

    is for purpose of reducing abuse of the START switch.



 

   Bob . . .    [quote][b]

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