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Battery drain
Did it seem to be working fine before you changed the battery?
probably not. I'd say you need to take the alternator to a competent shop and have it tested. If it's a Mando, or Prestolite/Motorola, the shop will know whats going on unlike taking it to a parts store for testing, because they don't hook up like conventional automotive units. Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike |
Battery drain
As far as I know, the allternator was fine before this happened. Replaced
the battery due to negligence (previous owner left it in the boat all winter). Mike wrote in message ups.com... Did it seem to be working fine before you changed the battery? probably not. I'd say you need to take the alternator to a competent shop and have it tested. If it's a Mando, or Prestolite/Motorola, the shop will know whats going on unlike taking it to a parts store for testing, because they don't hook up like conventional automotive units. Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike |
Battery drain
OK, assuming the alternator is good. you need to check all your
connections. You've probably replaced everything, but double check stuff anyhow. some wires maybe attached to the battery terminals, that may have been left off. It's a wild shot, but I'm mentioning it anyway. another thing, you may have gotten a bogus battery. charge overnight on a slow charger then take it in and have it tested. it could have come from the store with a weak cell. Just because it's "new" doesn't mean it's "good" But still, I would think that even with a bad battery, your volt guage should still be above 13v when running. an old rule of thumb is a decent charge when running is your alternator will put out a rating of 13.8-14.2 v. providing you have a decent battery. Christine wrote: As far as I know, the allternator was fine before this happened. Replaced the battery due to negligence (previous owner left it in the boat all winter). Mike wrote in message ups.com... Did it seem to be working fine before you changed the battery? probably not. I'd say you need to take the alternator to a competent shop and have it tested. If it's a Mando, or Prestolite/Motorola, the shop will know whats going on unlike taking it to a parts store for testing, because they don't hook up like conventional automotive units. Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike |
Battery drain
"Christine" wrote in message nk.net... As far as I know, the allternator was fine before this happened. Replaced the battery due to negligence (previous owner left it in the boat all winter). Mike wrote in message ups.com... Did it seem to be working fine before you changed the battery? probably not. I'd say you need to take the alternator to a competent shop and have it tested. If it's a Mando, or Prestolite/Motorola, the shop will know whats going on unlike taking it to a parts store for testing, because they don't hook up like conventional automotive units. Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike Did it rain a lot during those 2 weeks? Do you get water in the boat when it does? If so, the bilge pump could have been running a lot and drained the battery. What other devices run with the ignition in the off position? Something had to be running to drain your battery over those 2 weeks. |
Battery drain
Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike Use your voltmeter and see if there is a current discharge at the voltmeter. |
Battery drain
Use your voltmeter and see if there is a current discharge at the voltmeter. Or temporarily connect your VOM between the positive battery terminal and the positive battery cable and check to see if there is any appreciable current flow while the boat is in its stored condition, with everything allegedly turned off. This will tell you if anything is drawing the battery down while it is on the trailer or in the slip. Don't try and start the engine with the VOM is in line with the battery cable. The operative word was temporarily. Only just a test for static draw while at rest. If you do notice any amperage being drawn in this situation, you will need to manually disconnect each bit of electronics on the boat to find the offender. |
Battery drain
wrote: OK, assuming the alternator is good. you need to check all your connections. You've probably replaced everything, but double check stuff anyhow. some wires maybe attached to the battery terminals, that may have been left off. It's a wild shot, but I'm mentioning it anyway. another thing, you may have gotten a bogus battery. charge overnight on a slow charger then take it in and have it tested. it could have come from the store with a weak cell. Just because it's "new" doesn't mean it's "good" But still, I would think that even with a bad battery, your volt guage should still be above 13v when running. an old rule of thumb is a decent charge when running is your alternator will put out a rating of 13.8-14.2 v. providing you have a decent battery. Christine wrote: As far as I know, the allternator was fine before this happened. Replaced the battery due to negligence (previous owner left it in the boat all winter). Mike wrote in message ups.com... Did it seem to be working fine before you changed the battery? probably not. I'd say you need to take the alternator to a competent shop and have it tested. If it's a Mando, or Prestolite/Motorola, the shop will know whats going on unlike taking it to a parts store for testing, because they don't hook up like conventional automotive units. Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike OK, so it sounds like your alt. is working correctly. a "volt meter" is a simple thing. it usually has a ground wire which grounds the meter, eventually to the battery. and the positive side has a "red" wire that is attached to any switchable source. so..with key off, it's dead(0) with key on, you have battery voltage,( 12.6 v.+/-) and when running and charging (14 v +/-) the volt meter could be defective, like it's had water in it from rain water etc., but it shouldn't have any effect on the battery draining . because when the power is shutoff. the guage is also shut off with no current to feed it.off. now, if you shut the key off, and still have a reading in the gage, then you may have power leaking to it, via a defective relay somewhere. it does sound like you're working int he right direction. Here's something else you can try. another wild shot, but.... This is a fred flintsone alternator test. wit all hooked up, and the key off. take a screw driver and place it against the back housing of the alternator, where the back bearing is. and see if you have a magnetic draw. there may be a slight amount due to residual magnetism in the alternator field rotor, but it should be almost nothing. Turn on the key and try again. if you have a pretty good pull ( it won't suck it out of your hand) then you may have voltage coming from your key switch or again, a shorted relay that is causing power to be fed to the alternator. and the rotor, will take a 4-6 amp draw. thus a drian. It would be like coming home and before getting out of your car, shut off the car then turn the key back on and go to the house. alternator is energized and pulling current. if that's the case hten pull the wires (Motorola well say "exc." Delco will be wire "1" on the plug end, and Mando will be the "purple" wire) use a test light, hook to ground (Bat -) or direct to engine, and test the wire . if you have power on the field or "exc." wire with key off, then you either have a defective key switch (unlikely) or a bad relay (somewhere) or that wire kissed and mated up to a Pos. "hot" wire. More search and siezure.... you made mention of a thin red wire attached to the battery with a fuse. That wire is the main hot wire that goes to the main harness ie where the key gets it's power. if the fuse (30A?) blows, you probably wouldn't have any power to anything. I hope my ramblings are of some help. - On 6/19/06, Mike Salome wrote: Thanks for your suggestions. We removed the battery & took it back to the place of purchase, where it was tested and found to be OK. So the battery itself is not the issue. I still think the volt gauge in the boat's dashboard is suspect, since it only reads 10.5 volts with the engine running, and our hand-held voltmeter reads 13.98 at both the alternator & at the battery (both tests done with engine running). In addition to the red positive main battery cable, there is a thin red wire with a fuse that's attached to the positive side of the battery. I wonder if this wire is connected to the in-dash volt gauge, and if it's damaged somewhere along the line, thus giving the in-dash voltmeter a bad reading -- and possibly causing the battery to drain or to not receive a full charge from the alternator. I checked the fuse and it's OK. Do you know if in-dash volt gauges are normally hooked up directly to the battery or if they're hooked up directly to the alternator? Mike |
Battery drain
FWIW. In my 2000 Sea Ray 185, the thin red fused (10amp) wire from the
battery is for the amfm radio memory. I believe it does create a small drain because the radio needs some juice for the memory. TomC wrote in article . com... wrote: OK, assuming the alternator is good. you need to check all your connections. You've probably replaced everything, but double check stuff anyhow. some wires maybe attached to the battery terminals, that may have been left off. It's a wild shot, but I'm mentioning it anyway. another thing, you may have gotten a bogus battery. charge overnight on a slow charger then take it in and have it tested. it could have come from the store with a weak cell. Just because it's "new" doesn't mean it's "good" But still, I would think that even with a bad battery, your volt guage should still be above 13v when running. an old rule of thumb is a decent charge when running is your alternator will put out a rating of 13.8-14.2 v. providing you have a decent battery. Christine wrote: As far as I know, the allternator was fine before this happened. Replaced the battery due to negligence (previous owner left it in the boat all winter). Mike wrote in message ups.com... Did it seem to be working fine before you changed the battery? probably not. I'd say you need to take the alternator to a competent shop and have it tested. If it's a Mando, or Prestolite/Motorola, the shop will know whats going on unlike taking it to a parts store for testing, because they don't hook up like conventional automotive units. Christine wrote: Vessel: 1999 Maxum 1900SR Engine: 4.3l Mercruiser w/Alpha I drive Issue: Battery is being drained by ____(something). Details: Installed a new 550 CCA Marine Battery about 3 weeks ago. Ran great when first installed. Boat sat for 2 weeks, tried to start - "click". Nothing. Was able to jumpstart from the truck, ran it for about 15 min top charge. Voltmeter on the boat dashboard reads 10.5 volts. Hand-held voltmeter at battery reads 13.98; test at alternater reads the same. Took battery back to dealer & had tested. Battery OK, fully charged. So, I think the alternator is OK. No visible frayed wires & such. My gut tells me that the voltmeter in the dash is suspect since it reads differently than the hand-helds. Any sugggestions as to what could be draining the battery or anything else typically to look for? Thanks, Mike OK, so it sounds like your alt. is working correctly. a "volt meter" is a simple thing. it usually has a ground wire which grounds the meter, eventually to the battery. and the positive side has a "red" wire that is attached to any switchable source. so..with key off, it's dead(0) with key on, you have battery voltage,( 12.6 v.+/-) and when running and charging (14 v +/-) the volt meter could be defective, like it's had water in it from rain water etc., but it shouldn't have any effect on the battery draining . because when the power is shutoff. the guage is also shut off with no current to feed it.off. now, if you shut the key off, and still have a reading in the gage, then you may have power leaking to it, via a defective relay somewhere. it does sound like you're working int he right direction. Here's something else you can try. another wild shot, but.... This is a fred flintsone alternator test. wit all hooked up, and the key off. take a screw driver and place it against the back housing of the alternator, where the back bearing is. and see if you have a magnetic draw. there may be a slight amount due to residual magnetism in the alternator field rotor, but it should be almost nothing. Turn on the key and try again. if you have a pretty good pull ( it won't suck it out of your hand) then you may have voltage coming from your key switch or again, a shorted relay that is causing power to be fed to the alternator. and the rotor, will take a 4-6 amp draw. thus a drian. It would be like coming home and before getting out of your car, shut off the car then turn the key back on and go to the house. alternator is energized and pulling current. if that's the case hten pull the wires (Motorola well say "exc." Delco will be wire "1" on the plug end, and Mando will be the "purple" wire) use a test light, hook to ground (Bat -) or direct to engine, and test the wire . if you have power on the field or "exc." wire with key off, then you either have a defective key switch (unlikely) or a bad relay (somewhere) or that wire kissed and mated up to a Pos. "hot" wire. More search and siezure.... you made mention of a thin red wire attached to the battery with a fuse. That wire is the main hot wire that goes to the main harness ie where the key gets it's power. if the fuse (30A?) blows, you probably wouldn't have any power to anything. I hope my ramblings are of some help. - On 6/19/06, Mike Salome wrote: Thanks for your suggestions. We removed the battery & took it back to the place of purchase, where it was tested and found to be OK. So the battery itself is not the issue. I still think the volt gauge in the boat's dashboard is suspect, since it only reads 10.5 volts with the engine running, and our hand-held voltmeter reads 13.98 at both the alternator & at the battery (both tests done with engine running). In addition to the red positive main battery cable, there is a thin red wire with a fuse that's attached to the positive side of the battery. I wonder if this wire is connected to the in-dash volt gauge, and if it's damaged somewhere along the line, thus giving the in-dash voltmeter a bad reading -- and possibly causing the battery to drain or to not receive a full charge from the alternator. I checked the fuse and it's OK. Do you know if in-dash volt gauges are normally hooked up directly to the battery or if they're hooked up directly to the alternator? Mike |
Battery drain
"Gene Kearns" wrote in message ... On Mon, 19 Jun 2006 20:28:52 -0500, TomC penned the following well considered thoughts to the readers of rec.boats: FWIW. In my 2000 Sea Ray 185, the thin red fused (10amp) wire from the battery is for the amfm radio memory. I believe it does create a small drain because the radio needs some juice for the memory. TomC I put a breaker in line with all of my navionics because my (VHF)radio was constantly waiting for a WX broadcast. Great if you are on board and listening.... a drag if you aren't and the thing is draining your batterie(s). I had to do the same thing after replacing the stereo in a little Sea Doo jet boat I owned for about a year or so. The original deck that was in the boat when I bought it used was an older purely mechanically controlled AM/FM/Cassette deck that consumed no power once it was turned off. I replaced it with a modern AM/FM/CD deck with digital controls that used 12V to maintain presets in memory and to standby to wait for a possible IR command from the little remote control. The silly boat had no battery switch, and after I replaced the stereo, I found that the battery would be drained after sitting for a week. Using the method I prescribed elsewhere in this thread, I discovered that this new stereo was drawing half an amp of power just sitting there while turned off!. I couldn't believe it. Half an amp doesn't sound like much, but 24/7 on the trailer it adds up quick. Since the stupid stereo was the only offending item. It was easier to install a breaker switch next to the stereo than install a battery on/off switch, which Sea Doo should have had done to begin with. Problem solved. Silly boat eventually sold. |
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