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i am new to the world of boating mechanics coming from the auto world and have a charging question. how long should it take to charge the battery back up? here is my situation, i was installing the seats and listening to the radio for about 45 min. we then too a trip around the lake (3 mile circumference lake) at 1/4 -1/2 throttle. we parked and listened to radio another 30 min. when i went to start it the battery was dead (this is a new battery). should i not expect the battery to be charged after this trip? is there a charging booster i can add if this is not the case? fyi, this motor is moving and 18 pontoon boat.
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Maybe the battery is "new", but been sitting in the boat for weeks and days long enough to drain it's charge?...A fully-charged battery should easily run a radio for a long time without running the battery dead. My best guess is that your battery cables/connections may be corroded and should be removed, polished shiny with a 3M Scotchbrite Pad, a little grease and then tightened, so charging system will work. If it was my battery, I'd put it on a 2 Amp Charger for a day or so to charge it up good. Good Luck!
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thanks, connections were clean and i brought the battery home this week to charge. i was thinking the same thing that the battery should last longer. i was told by a Yamaha "tech" that this motor does not put out that many amps when running to charge the battery, is this correct?Comment
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Manual will give the specs for that motor, but my guess is 6 amp charging system.
Maybe your motor is not charging properly and/or your boat has something pulling more amps from battery than just the radio.
Need to check it with a meterComment
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Your 25HP motor charges at 6 AMPS, but if your battery was never really charged up full, then that 6AMPS charge rate would take several hours of run time to top it off. Best bet is a slow 2 AMP charge on a battery charger for a day or 2.Comment
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thanks for all the help guys! what is your thoughts on those on-board charging systems seeing as i don't really feel like taking the battery out all the time to charge it if it dies....Comment
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If you're at a dock with shore power then an on-board charger is very convenient, especially if days and weeks go by without running your motor, or if you have a lot of accessories like *****ing motors or lights and need to keep your battery/batteries full. The solar powered rigs are more to maintain than to charge batteries.Comment
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don't have dock power, was looking at those ones that charge while the motor is running...Comment
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I believe if your battery is good and you'll charge it up full, you're not going to have problems. But if you're not going to run the motor for several weeks, then take the battery to your garage/work shop and put it on a charger. If you're not going to run the motor much and just want to fish and listen to the radio, you might consider getting an "accessory" battery just for the radio, like guys do for their *****ing motors and such....beats having a dead "starting" battery out on the lake!Comment
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Not sure what you are talking about as the motor puts out the voltage and amps to charge battery while motor is running.Originally posted by bowtech99 View Post
What kind of radio system you running?
Bunch of amps and speakers that consume a bunch of power?
If so I would go with Roberts idea and mount some big batteries for accessories only, but you still will have to charge them some how.
You need to find out what you are pulling power wise and if you motor is charging enough to keep batteries upComment
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and that"s 6 amps at WOT, lower RPM's mean lower amperage.Comment
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thanks everyone, i think i'm going with the extra battery for the accessories...Comment
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