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Impeller help for a moron????
https://www.smwebhead.com/phpBB3/viewtopic.php?f=11&t=3969		 Page 1 of 2
Author:  pet575 [ Mon Jul 06, 2009 5:35 pm ]
Post subject:  Impeller help for a moron????
So, I've been meaning to change my impeller since the season started. Here's my problem....I'm too dumb to know where it goes. I've always had either an outboard or an Alpha drive so that the impeller is back in the outdrive somewhere-never had one where it is on the engine.

2007 Merc 350 MAG MPI, Bravo 3 drive. Haven't "just dug into it" because I don't want to cost myself time on the water by screwing it up. Engine has 100 hours on it, and it is the 3rd season, so it is time to do it.

Pic below, Please help. Thanks!!! :D

Image
Author:  FWFord's [ Mon Jul 06, 2009 5:43 pm ]
Post subject:  Re: Impeller help for a moron????
Why do you need to change it?
Author:  M3eater [ Mon Jul 06, 2009 5:46 pm ]
Post subject:  Re: Impeller help for a moron????
The lower-most pulley, on the starboard side, is the raw water pump. Impeller goes in the pump.
Author:  pet575 [ Mon Jul 06, 2009 5:51 pm ]
Post subject:  Re: Impeller help for a moron????
FWFord's, I'm changing it as preventive maintenance-before it goes on its own.
Author:  FWFord's [ Mon Jul 06, 2009 5:55 pm ]
Post subject:  Re: Impeller help for a moron????
Just wondering. I didn't know if you had some indication that caused you to change it or not. I haven't thought about doing a preventative on this. I need to look this up, how often are we suppose to change them?
Author:  pet575 [ Mon Jul 06, 2009 5:56 pm ]
Post subject:  Re: Impeller help for a moron????
M3eater, are you and I on the same page here?

Image
Author:  FWFord's [ Mon Jul 06, 2009 6:05 pm ]
Post subject:  Re: Impeller help for a moron????
According to the manual that's the sea water / raw water pump. I don't see anything in the manual about periodically changing the impeller. I think it's a good idea but how often is the question for me.

Thanks
Author:  M3eater [ Mon Jul 06, 2009 6:11 pm ]
Post subject:  Re: Impeller help for a moron????
That's it.

Not sure about the no mention of a preventative maintenace operation on it.
Author:  captwalt [ Mon Jul 06, 2009 6:23 pm ]
Post subject:  Re: Impeller help for a moron????
Most do it yourselfers do it with their yearly maintenance since they are already in there. I do mine every other year and keep a spare around.
Author:  FWFord's [ Mon Jul 06, 2009 6:30 pm ]
Post subject:  Re: Impeller help for a moron????
Good info. Thanks

Doesn't appear to be something easy to remove, the pump that is.............
Author:  230 Mike [ Mon Jul 06, 2009 7:57 pm ]
Post subject:  Re: Impeller help for a moron????
Yeah, looks a little harder than a Volvo. Just sayin'... :lol:
Author:  M3eater [ Mon Jul 06, 2009 8:36 pm ]
Post subject:  Re: Impeller help for a moron????
230 Mike wrote:
Yeah, looks a little harder than a Volvo. Just sayin'... :lol:



Umm ... thanks Mike, I was gonna leave that one alone ......
Author:  FWFord's [ Mon Jul 06, 2009 8:52 pm ]
Post subject:  Re: Impeller help for a moron????
Maybe the Volvo's need to be changed every couple years and the Merc's are good for many years? Ya think?
Author:  tennja [ Mon Jul 06, 2009 9:03 pm ]
Post subject:  Re: Impeller help for a moron????
FWFord's wrote:
Good info. Thanks

Doesn't appear to be something easy to remove, the pump that is.............


It's not that bad of a job if you can get to it, the pump that is :mrgreen:

Pet if you need any tips let me know I have done it before.
Author:  AlexJ [ Wed Jul 08, 2009 6:51 am ]
Post subject:  Re: Impeller help for a moron????
I remember reading somewhere in an engine maintenance manual that the impeller should be replaced at least every other year. I suppose that would not take into account how many hours you put on an engine during the year or a season. I personally would rather change the impeller every other year because of the low hours I put on the engine during the season than have another over heated engine. $48 vs $5600.
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