Hi! Alan,
I think you will find the old battery has a shorted out plate.
If you can test it running you will probably find a charge of about 14.5
volts.
My original Oddessey batteries were on about 10 years before I got scared
of expecting them to last longer but I had two wired in parallel to start
the Jabiru 6 cylinder. One had gone down and it soon pulled the other one
down.
I have just had a repeat event and the one I took off won't even start the
lawn mower on it's own immediately after a slow charge. But the remaining
15 year old battery still fires up the lawn mower on it's own.
I's not the volts that starts the engine it is the ability to release a high
amperage over a short time.
Regards
Bob Harrison. G-PTAG
PS I got my replacement from Demon Tweeks.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Alan Carter
Sent: 16 July 2015 19:54
Subject: Europa-List: Charging System
--> <alancarteresq@onetel.net>
Hi All.
Had a job starting the engine away from base, Starter turned the engine over
OK but there did not seem any spare electricity for electronic ignition
system, jump leaded it from another battery and away it went.
The battery is a Odyssey 680 which give 680amps for 5 seconds dated 2008,
installed 09 2009 so 5 or 6 years old.
However bought a new one, put a volt meter on the new one, 12.87v tried it
on the old one 12.95v ?????
Anyway the new one seemed to turn the engine over quicker and it started
straight away .
I know a cars Alternator output is 13.8v,engine running, but on the aircraft
using a volt meter on the battery, I was getting about 13.05v charging rate,
switched on all the electrics and it dropped down to 12.6v
Do I have a problem.????
Many thanks
Alan
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