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Old 06-09-2017, 05:28 AM   #1
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Delay on impeller replacement

Replaced my port impeller last weekend, no issues. However, a slight emergency made me leave the boat without opening the raw water intake or turning the engine. So, impeller has been sitting in there all week with only some lube on the veins, a couple of veins aimed "backwards", not in the proper turning direction. Going back tonight to finish up and replace other impeller....any harm done by the delay?
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Old 06-09-2017, 06:06 AM   #2
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No. The impeller doesn't know or care that its installation got interrupted. It'll be fine.
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Old 06-09-2017, 07:23 AM   #3
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Thanks. I hope I get there before anyone tells it. .
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Old 06-09-2017, 07:33 AM   #4
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If your emergency was due to the boat being on fire, your impeller may have been damaged

L.
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Old 06-09-2017, 07:46 AM   #5
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Impeller vanes will align themselves correctly when started.
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Old 06-09-2017, 10:02 AM   #6
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Thanks guys. Lou, luckily the fire was on the port side of the boat only. We're cool. . I think my concern is or was more about running the impeller while dry. Thought maybe it sitting there for a week the lube would have dried up or soaked in, whatever. Has to draw water up from closed seacock and thought it may hurt. Not sure I have to close the seacock really as I can't say if the pump is below waterline. It's close but not sure.
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Old 06-09-2017, 11:01 AM   #7
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Quote:
Originally Posted by bayview View Post
Impeller vanes will align themselves correctly when started.
It's also easy to align them during the install. Just put a band around them and tighten enough, with vanes in the correct position, to just slide half way in and release the band. Easy.
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Old 06-09-2017, 11:07 AM   #8
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No worries...it'll be fine. My engines sometimes requires a short bump in power initially to prime the pump and get the flow started.
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Old 06-09-2017, 12:01 PM   #9
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Open the seacock before you start the engine!
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Old 06-09-2017, 05:04 PM   #10
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Open the seacock before you start the engine!
1) Been repeating that to myself every hour, on the hour. Have an alarm set to wake me up every hour during the night so I can repeat it then.

2) Used my label maker to put "OPEN SEACOCK" on the boat key. Also put one on each lens in my eye glasses. Reversed so I can read it.

3) Got a small tattoo on the back of both of my hands. "Open Seacock" is on the left hand. On the right hand I got one that says "PLEASE READ LEFT HAND". Had the guy add a Harley with "Ride Free or Die" underneath both of them so I will at least look a little bad ass for the rest of my life.

4) Called marina and had them change my gate access code to 6736*7322625 which of course spells, you got it, "Open Seac...."

You get my point. I'm trying real hard to remember to open the friggin seacock.
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Old 06-09-2017, 05:10 PM   #11
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Greetings,
Mr. f. Open sea cock AND keep an eye on your shoes...
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Old 06-09-2017, 05:48 PM   #12
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Well it was leaking a few drops when I closed it...thru hull maintenance...on the list for when I pull the boat for AF paint in a couple of months. All of them need a little tending to. I bet you guys are REALLY looking forward to me flushing out the cooling system and AC units with some Barnacle Buster. Admit it. VERY excited aren't you? Hey, us newbies keep you fresh.
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Old 06-09-2017, 08:39 PM   #13
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I've always taped a piece of paper with Seacock on it to the battery (turned off) switch of any engine/generator that I have close the seacock on for some reason. I don't take it off to turn the switch on until I check and open the seacock, sometimes twice (OCD).

Never used one but I recon one of these tools would be fantastic for changing impellers.
Impeller Installation Tool

Coupled with liberal amounts of Dow Corning Compound 4. I love that stuff for any rubber parts, orings etc.
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Old 06-09-2017, 09:48 PM   #14
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I have one of the impeller changing tools. Works great. My starboard engine water pump is almost impossible to access. With that tool, I can actually get the impeller changed in about 20 minutes. Love it.
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Old 06-09-2017, 10:12 PM   #15
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Quote:
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Greetings,
Mr. f. Open sea cock AND keep an eye on your shoes...
I forgot to mention that. Thanks for reminding us.
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Old 06-10-2017, 06:15 AM   #16
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Personally my experience with impellers would have made me throw that one away and put a brand new one in. I am not getting stuck out in the ocean changing an impeller AGAIN anytime soon.
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Old 06-10-2017, 08:18 AM   #17
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Quote:
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Never used one but I recon one of these tools would be fantastic for changing impellers.
Impeller Installation Tool

Coupled with liberal amounts of Dow Corning Compound 4. I love that stuff for any rubber parts, orings etc.
Thanks, not much of a website for ordering, you have to call them. Looks like a very reasonable items as compared to the WM type impeller pullers. I have to say that, maybe because of size/location, it wasn't very difficult to pull or install mine. Pliers...right out....little lube and slid back in.

Is the Dow Corning Compound 4 overkill for this particular job? Seems relatively expensive at $20 +- a tube... is there a benefit to it in this application that makes it better than other lubes/grease?
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Old 06-10-2017, 08:20 AM   #18
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Quote:
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Personally my experience with impellers would have made me throw that one away and put a brand new one in. I am not getting stuck out in the ocean changing an impeller AGAIN anytime soon.
You sound like...ME! Paranoid about engines and their issues...

I see you are "down here" Donna...tired of the rain yet?!?! I know its a good thing in the long run but how about a break with a day or two of sun???
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Old 06-10-2017, 08:32 AM   #19
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... I'm trying real hard to remember to open the friggin seacock.
When we close the engine seacock, we hang the key on the handle. When I retrieve the key, I open the seacock. No tattoos or labels.
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Old 06-10-2017, 09:16 AM   #20
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When we close the engine seacock, we hang the key on the handle. When I retrieve the key, I open the seacock. No tattoos or labels.
Hmmm...well...I guess I could do that. Still want to keep my "Ride Free or Die" tattoo though. You know, bad ass and all...
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