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<DIV><FONT face=Arial>It may be that this arrangement is set up for an "isolated
ground," which is intended to avoid stray current corrosion through the prop and
shaft, since the engine forms no part of the circuit. You might want to see
Calder's book (Boatowner's Mechanical and Electrical Manual), pp. 83-84 for an
explanation of this arrangement, to see if it matches your
circumstance.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Rob Alley</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=timmins@optonline.net href="mailto:timmins@optonline.net">Brian and
Elaine Timmins</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=public-list@alberg30.org
href="mailto:public-list@alberg30.org">Post to Publiclist</A> ; <A
title=atomic4-list@sailnet.net
href="mailto:atomic4-list@sailnet.net">atomic4-list@sailnet.net</A> ; <A
title=gearmaintenance-list@sailnet.net
href="mailto:gearmaintenance-list@sailnet.net">Post to gear maintenance
list</A> ; <A title=electricalsystems-list@sailnet.net
href="mailto:electricalsystems-list@sailnet.net">post to electrical systems
list</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, November 17, 2002 1:04
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Alberg30] Floating Ground on
Diesel Engines</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Can anyone explain to me why my Diesel (Perkins
4-108) has a floating ground? I am just about to start to rewire the
controls and instrumentation, and realised that all of the senders, the
starter circuit, & the charging circuit all have additional wires creating
a Floating Ground. </FONT></DIV>
<DIV><FONT face=Arial size=2>Seems odd since there is a connection of the
ground circuit to the engine anyway. The very oddest is the ground lug on the
starter has a jumper to ground to the engine on a mounting bolt for the
starter! What's up with this?</FONT></DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>Brian</FONT></DIV></BLOCKQUOTE></BODY></HTML>