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#1
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Re-charging Battery
How do I check whether my outboard (Mercury 40hp) re-charging the battery or
not? Thanks for the suggestions. |
#2
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Re-charging Battery
On Wed, 28 Apr 2004 17:10:03 GMT, "Ivan Young"
wrote: How do I check whether my outboard (Mercury 40hp) re-charging the battery or not? Thanks for the suggestions. Checking the battery volts should show a slight rise when the OB is charging. It probably gives out just a few amps, so it won't leap from 12.6 all the way to 13.8 volt - just up a little... Brian W |
#3
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Re-charging Battery
Ivan Young wrote:
How do I check whether my outboard (Mercury 40hp) re-charging the battery or not? Thanks for the suggestions. after the motor has been started, you can put an ammeter in the battery lead, it should show current flowing INTO the battery. do this after starting the motor, otherwise you can damage the ammeter, or blow the fuse (if it is so equipped) -- the most committed always win |
#4
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Re-charging Battery
How do I check whether my outboard (Mercury 40hp) re-charging the battery or not? A DC voltmeter. Anything above 12.6 VDC with the engine running and the battery is being charged. HTH -- Lew S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland) Visit: http://home.earthlink.net/~lewhodgett for Pictures |
#5
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Re-charging Battery
On Wed, 28 Apr 2004 20:08:22 -0500, dazed and confuzed
wrote: do this after starting the motor, otherwise you can damage the ammeter, or blow the fuse (if it is so equipped) ========================================== This is an excellent way to burn out the diodes in your charging system if you have any. Not recommended in my book. |
#6
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Re-charging Battery
Wayne.B wrote:
On Wed, 28 Apr 2004 20:08:22 -0500, dazed and confuzed wrote: do this after starting the motor, otherwise you can damage the ammeter, or blow the fuse (if it is so equipped) ========================================== This is an excellent way to burn out the diodes in your charging system if you have any. Not recommended in my book. not saying you are wrong, but why do you say that? -- the most committed always win |
#7
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Re-charging Battery
On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed
wrote: ========================================== This is an excellent way to burn out the diodes in your charging system if you have any. Not recommended in my book. not saying you are wrong, but why do you say that? ============================================== If you open up the circuit while it is under load the voltage can (and frequently does) rise to the point where the Peak Inverse Voltage rating of the diodes is exceeded, and the junction permantently fails. |
#8
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Re-charging Battery
Wayne.B wrote:
On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed wrote: ========================================== This is an excellent way to burn out the diodes in your charging system if you have any. Not recommended in my book. not saying you are wrong, but why do you say that? ============================================== If you open up the circuit while it is under load the voltage can (and frequently does) rise to the point where the Peak Inverse Voltage rating of the diodes is exceeded, and the junction permantently fails. for the few seconds required to place an ameeter in the circuit? Perhaps. But I doubt it. Your mileage may vary. B -- the most committed always win |
#9
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Re-charging Battery - Believe Him
I have seen this failure an a number of occasions.
Yes - It happens -NOW- in much less time than a human can respond. Several conpanies (most notably F.W. Bell - also marketed by Fluke) sell DC clamp on current probes. I have one just for this sort of thing, but they are expensive and delicate. A cheap and practical alternative is available at J C Whitney http://www.jcwhitney.com an inductive ammeter (they call it a current indicator) Their SKU ZX179446X It is just about a spring load compass that you hold near the wire, but they do work and can get you headed in the right direction (no pun intended). I used one for years diagnosing car electric problems. Matt Colie Wayne.B wrote: On Thu, 29 Apr 2004 16:34:10 -0500, dazed and confuzed wrote: ========================================== This is an excellent way to burn out the diodes in your charging system if you have any. Not recommended in my book. not saying you are wrong, but why do you say that? ============================================== If you open up the circuit while it is under load the voltage can (and frequently does) rise to the point where the Peak Inverse Voltage rating of the diodes is exceeded, and the junction permantently fails. |
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