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Thanks John and Randall.I figured there was some way it was overdriving =
the solenoid. I didn't think it would be the amps because batteries can=
provide plenty of them.Wasn't aware that the voltage regulation was sus=
pect! I WAS very careful to not cook the starter - those are expensive. =
I think I will just use a car battery & cables for further testing. MB
---------- Original Message ----------
From: "Randall" <TR3driver@ca.rr.com>
To: "'Matt'" <mbarre@juno.com>, <shop-talk@autox.team.net>
Subject: RE: [Shop-talk] Solenoid question
Date: Sun, 25 Sep 2016 15:46:41 -0700
> I was doing most of the cranking with power from my 12
> volt battery charger/starter set to the starting/225A setting. =
Most of those type of units have really poor voltage regulation, open
circuit voltage on the 'Start' setting may be as high as 24v or more!
My guess is the high voltage (possibly in the form of a huge inrush curr=
ent
when the solenoid contacts close) is what killed the solenoid.
You can still use the charger, just leave the battery in the circuit.
Probably best to turn the charger down, and then give the starter a rest=
when the battery gets tired; as the starter will also have a very limite=
d
duty cycle.
-- Randall
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<html><div>Thanks John and Randall.</div>
<div>I figured there was some way it was overdriving the solenoid.  =
;I didn't think it would be the amps because batteries can provide =
plenty of them.</div>
<div>Wasn't aware that the voltage regulation was suspect!</div>
<div> </div>
<div>I WAS very careful to not cook the starter - those are expensive.</=
div>
<div> </div>
<div>I think I will just use a car battery & cables for further test=
ing.</div>
<div> </div>
<div>MB</div>
<div><br><br>---------- Original Message ----------<br>From: "Randall" &=
lt;TR3driver@ca.rr.com><br>To: "'Matt'" <mbarre@juno.com>, <=
shop-talk@autox.team.net><br>Subject: RE: [Shop-talk] Solenoid questi=
on<br>Date: Sun, 25 Sep 2016 15:46:41 -0700<br><br>> I was doing most=
of the cranking with power from my 12<br>> volt battery charger/star=
ter set to the starting/225A setting. <br><br>Most of those type o=
f units have really poor voltage regulation, open<br>circuit voltage on =
the 'Start' setting may be as high as 24v or more!<br><br>My guess is th=
e high voltage (possibly in the form of a huge inrush current<br>when th=
e solenoid contacts close) is what killed the solenoid.<br><br>You can s=
till use the charger, just leave the battery in the circuit.<br>Probably=
best to turn the charger down, and then give the starter a rest<br>when=
the battery gets tired; as the starter will also have a very limited<br=
>duty cycle.<br><br>-- Randall</p></html>
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