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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Jul 2011
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Talk Morgan Addict
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Talk Morgan Addict
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Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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Nice bit of work Alexander  Might be worth adding a couple of boots to those exposed terminals 
Roger
2011 Plus 4
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Joined: May 2009
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L - Learner Plates On
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OP
L - Learner Plates On
Joined: May 2009
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Thank you. Good idea about some boots.
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Joined: Aug 2010
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Learner Plates Off!
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Learner Plates Off!
Joined: Aug 2010
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Hi Peter.
Be aware that modern(and not so modern) aircrafts use 28V DC, and 115V AC
The battery('s)are 28V from a type that might start a fire.
Rudolf
Morgan Aero8 S4 «Tango»
Fisker Ocean
Harley Davidson Livewire
BMW R100/7 , R100R
Moto Guzzi 254
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Joined: May 2009
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OP
L - Learner Plates On
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Ruby now starts like a dream! I worked out why I was having trouble before - the cells were only half full, the acid having leaked down over the bulkhead. I guess it's all the potholes around here... 
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Member of the Inner Circle
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Member of the Inner Circle
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Ouch how is the bulkhead? Time for some neutralsing solution & a good clean up?
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Jul 2007
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Member of the Inner Circle
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Member of the Inner Circle
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Just a thought is the rectifier over charging & boiling it off? Seems odd for it to just be bounced out.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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How would I tell? The voltage meter seems correct on the dashboard.
Bulkhead cleaned & neutralised before fitting the new battery. :-)
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Use a dvm across the battery terminals when the engine is running anything higher than 14.5vdc and you have a problem in the alternator.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3) 
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Joined: May 2009
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I've just measured the voltage across the battery terminals:
Idle: 14.2V
5000 rpm: 14.2V
I've also noted that the dashboard meter reads significantly low! 13.8V (estimated as the graduations are not precise.
I don't think that's too high. The spec sheet says the following:
Alternator: 13.3 to 15.0 volts; no amperage limit
Battery Charger: 13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximate
Float Charge: 13.2 to 13.8 volts; 1 amp maximum current (indefinite time at lower voltages)
Rapid Recharge: (Constant voltage charger) Maximum voltage 15.6 volts. No current limit as long as battery temperature remains below 50°C (125°F). Charge until current drops below 1 amp.
The previous battery was very "discount"!
Last edited by Alexander; 13/04/15 11:49 AM.
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