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Old 04-12-2011, 09:21 PM
cordark615 cordark615 is offline
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Melted impellers

Why would the inside of the green ballast impellers be melted out? The guy we bought our boat from said he changed them to green,which he did, they were just melted. Thanks
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Old 04-12-2011, 10:25 PM
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coz coz is offline
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Originally Posted by cordark615 View Post
Why would the inside of the green ballast impellers be melted out? The guy we bought our boat from said he changed them to green,which he did, they were just melted. Thanks
No water will do that.
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Old 04-12-2011, 10:37 PM
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Yep.. Ran them dry..
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Old 04-13-2011, 05:10 PM
cordark615 cordark615 is offline
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How long do you think it would take to melt them running dry? Thirty seconds or ten minutes. The reason i am asking is because i dont want to do it.
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Old 04-13-2011, 05:52 PM
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Closer to 30 seconds that to 10 minutes.
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Old 04-13-2011, 06:21 PM
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pmkkdx pmkkdx is offline
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not sure on the ballast impellors, but on an engine impellor only about a minute, two tops, running dry ...

found that out when my wife forgot to kill the engine coming out of the lake shortly after we upgraded from the older louder '83 S&S to the much quieter '04 X2 ... top of the ramp when I started to towel down the boat, I felt vibration on the hull ... so I asked her "did you kill the engine?" ... she shrudded her shoulders and said "I dunno" ... next day out, noticed temp gauge running pretty hot at idle speeds upon unloading, we re-loaded immediately and headed home (I didn't have a spare impellor for that boat to do a replace on the fly)
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Old 04-13-2011, 08:08 PM
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Originally Posted by pmkkdx View Post
not sure on the ballast impellors, but on an engine impellor only about a minute, two tops, running dry ...

found that out when my wife forgot to kill the engine coming out of the lake shortly after we upgraded from the older louder '83 S&S to the much quieter '04 X2 ... top of the ramp when I started to towel down the boat, I felt vibration on the hull ... so I asked her "did you kill the engine?" ... she shrudded her shoulders and said "I dunno" ... next day out, noticed temp gauge running pretty hot at idle speeds upon unloading, we re-loaded immediately and headed home (I didn't have a spare impellor for that boat to do a replace on the fly)
Bet you have a 35 dollar back up now
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Old 04-13-2011, 08:08 PM
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Originally Posted by east tx skier View Post
Closer to 30 seconds that to 10 minutes.
i don't think they would melt that fast. i finally replaced mine this last season and they looked fine. i have run them up to 7-10 minutes dry in the past with no issues.

i am guessing maybe something else is wrong with the pumps.
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Old 04-13-2011, 08:49 PM
cordark615 cordark615 is offline
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I dont know, maybe his kids left it on. Maybe all night.
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Old 04-13-2011, 09:21 PM
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i don't think they would melt that fast. i finally replaced mine this last season and they looked fine. i have run them up to 7-10 minutes dry in the past with no issues.

i am guessing maybe something else is wrong with the pumps.
I don't have ballast pumps. But this past weekend, I started up and mistakenly ran my boat without the belt that turns the impeller in the pump housing. Noticed it pretty quick (matter of minutes), shut down, and got the belt on there. Ran it for maybe a minute after that and shut down when the heat spiked. I don't know how I toast an impeller that isn't turning. So I presume it got too hot without turning and when I did spin it, it fell apart quick.

Different circumstances for sure, but these things are not built to be run dry for long. Heat will kill them.
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