"Extra" post on replacement solenoid?

stevebar

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Feb 24, 2007
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I am replacing the starter on a Mercruiser 7.4 L V8 Bravo. The new starter has an ARCO solenoid #SW463 that has one more terminal than the original solenoid. (Photo below and at http://www.capecorp.com/solenoidcomparison.jpg). I?m not sure what to do with the ?extra? terminal. From the picture you can see that the old solenoid had a place for a terminal but it was sealed off.

I have four wires to go to the solenoid and based on a wiring diagram (below and at http://www.capecorp.com/wiringdiagram.jpg) my guess as to where they go is.
Red cable (12V Battery) ? To large terminal
Small gauge yellow/red ?To one of the small terminals?
Small gauge red ? To large terminal?
Small gauge orange ? To same terminal as the battery?

This is complicated a bit by the fact that the red cable, the orange wire and the small gauge red were broken off the original solenoid so I don?t know exactly where they went. My guess is that they were all attached to the large terminal along with the cable from the battery.

My questions are what should I do with the ?extra? solenoid terminal and are my wire assignments correct?
 

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Don S

Honorary Moderator Emeritus
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Aug 31, 2004
Messages
62,321
That extra post is for the "Hot Start" wire for points type ignitions, or electric fuel pump operation while cranking on engines with electric fuel pumps. If you have neither, it's not necessary to hook anything to it.
 

Reel Poor

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Joined
Jan 29, 2005
Messages
5,522
Re: "Extra" post on replacement solenoid?

Both of your red and the orange wires go on terminal "A". The yellow/red wire goes on terminal "B". You do not need terminal "D" to wire it like it would have been on the starter you removed.​


Starter20Solenoid.png
 
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