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Old 05-25-2017, 06:23 AM
Pnracing51 Pnracing51 is offline
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Ballast fill & engine rpm

I have noted that the manual states that the engine rpm must be at 1500rpm when filling or emptying ballast. Does anyone know why that is? Does it have to be in gear or can it be free revving?
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Old 05-25-2017, 07:01 AM
little_franny little_franny is offline
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My guess would be to bring the alternator up to a sufficient output, alternators don't put out many amps at idle, they need some RPM to get to peak amp output. This would combat any low voltage issues that could arise from running ballast at idle, computers don't like low voltage or spikes.
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Old 05-25-2017, 07:50 AM
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flyguy570 flyguy570 is offline
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^what he said. If you listen to the pumps there is a significant difference in the sound you will hear coming from the pumps when you have the engine idled up. My dealer that I bought our boat from specifically said 1500 Rpm in neutral. Someone else can comment on whether or not it's ok to fill the tanks when underway.
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Old 05-25-2017, 01:21 PM
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tr6coug tr6coug is offline
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Increasing the RPM keeps the voltage up so the pumps run faster. I have always filled and emptied while underway without any problems.
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Old 05-25-2017, 01:47 PM
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Old 05-25-2017, 10:36 PM
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blackhawk blackhawk is offline
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Mine fill the best while driving. But, I will fill my tanks and bags with the engine off a lot of times. I just always run one pump at a time if the engine is off.
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Old 05-27-2017, 02:38 PM
JVDT JVDT is offline
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I understand it is necessary because of the ballast system having AI. It's constantly watching the voltage and the amperage and if you are trying to run all three pumps at one time the voltage is not high enough and you will notice your switch lights blinking and if you count how many times they blink at lower RPMs it will show a code for low-voltage. I have a 2010 X 45 and I can run one pump at a time at Idle or engine off but if I add more they trip out on low-voltage


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Old 05-27-2017, 05:51 PM
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LDA6339 LDA6339 is offline
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Don't have any problems using all 3 pumps with the engine off on ours but I never thought of doing them one at a time. Gonna do that from here on out.


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Old 05-28-2017, 07:48 AM
Pnracing51 Pnracing51 is offline
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Yep that makes perfect sense. I thought it may have had something to do with the water intake but then noticed the ballast pickups are all separate to the engine water pickup so voltage makes perfect sense.
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Old 12-11-2017, 07:37 PM
adamantium adamantium is offline
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Team, what happens if you turn the pumps on while the boat is in the garage, just to test them? Given the voltage comments above, what would you expect to happen? I ask that because right now when the switch for rear port/starboard is turned on, the pump acts like its starting then the switch blinks twice. Is there some sort of safety if the boat is not in the water/engine is not turned on? The KGB ballast blinks 3 times when turned on, and the pump does not react at all like with the port/starboard. Any thoughts?
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