www.iFourWinns.com

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!!!

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Paul
2007 Four Winns Horizon 220
Mercruiser 350 Mag MPI w/ Bravo III Drive
2004 Ford Explorer Limited (V8-AWD)
Pomme de Terre Lake (Southwest Missouri)

Why do you need to change it?

The lower-most pulley, on the starboard side, is the raw water pump. Impeller goes in the pump.

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Gordon Arnold
New Hampshire

2003 268 Vista ..................................................................Prior: 97 245 Sundowner

FWFord's, I'm changing it as preventive maintenance-before it goes on its own.

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Paul
2007 Four Winns Horizon 220
Mercruiser 350 Mag MPI w/ Bravo III Drive
2004 Ford Explorer Limited (V8-AWD)
Pomme de Terre Lake (Southwest Missouri)

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?

M3eater, are you and I on the same page here?

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Paul
2007 Four Winns Horizon 220
Mercruiser 350 Mag MPI w/ Bravo III Drive
2004 Ford Explorer Limited (V8-AWD)
Pomme de Terre Lake (Southwest Missouri)

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

That's it.

Not sure about the no mention of a preventative maintenace operation on it.

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Gordon Arnold
New Hampshire

2003 268 Vista ..................................................................Prior: 97 245 Sundowner

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.

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Walter

2003 248 Vista - VP 5.0 GXi
2009 Toyota Tundra SR5 5.7L 4x4

Good info. Thanks

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

Yeah, looks a little harder than a Volvo. Just sayin'...

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Mike
2005 Four Winns 230/240
VP 5.7GXi/DP
1998 F-150 XLT
Boat Pic

Umm ... thanks Mike, I was gonna leave that one alone ......

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Gordon Arnold
New Hampshire

2003 268 Vista ..................................................................Prior: 97 245 Sundowner

Maybe the Volvo's need to be changed every couple years and the Merc's are good for many years? Ya think?

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

Pet if you need any tips let me know I have done it before.

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2008 Horizon 260 VP 8.1 Gi

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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Alexj



1995 Four Winns Horizon 190
OMC 5.0 RL