Message-Id: <5.2.0.9.0.20030727192752.044d8ce0@incoming.verizon.net>
Date: Sun, 27 Jul 2003 19:34:21 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Canyon <steve.canyon@verizon.net>
Subject: Re: [FlyRotary] solonoid
In-Reply-To: <list-2504893@logan.com>
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Peter Cowan/Lexy Cameron wrote:

>Connecting the output of the new solonoid directly to the cable going 
>into the starter has fixed the run on problem (no power at either of 
>the large terminals now). The problem must be due to power in the 
>contactor getting to the windings of the solonoid. I'd thought these 
>were totally separate circuits and don't understand what would have 
>caused this.
>Peter
---
Well, I'll take a shot at a possible solution to the mystery.  It is 
very common on starter solenoids to have +12V connected internally to 
one side of the coil, even is it has an external terminal for that 
connection also.  In a case like this, it is customary to activate the 
solenoid by grounding the other small coil terminal to activate the 
solenoid and starter, and disconnect it to deactivate.  Not knowing the 
particulars of your solenoid, I can't say is this is the case for the 
one you have but it may give you another thought to pursue.

Regards,
Steve