Impeller Replacement?

[bugup]

I am wondering how you know when you should replace your impeller. What are the signs that it may be wearing out? I have no cooling problems, however, I also want to make sure that I am doing the correct prevenative maintenance.<br /><br />

 

[tm lihou]

Re: Impeller Replacement?

How old is the impeller? Just replaced mine this year...it was 3 years old. Cost me $300 Canadian. I had no trouble at the end of last season, but when she fired up this spring it wasn't sucking any water.<br /><br />From what I understand, three years is about average for an impeller in a Merc, which is what I own.<br /><br />Not sure about OMC.

 

[lilmandavis]

Re: Impeller Replacement?

anytime there is doubt about the impeller... it should be changed as well as the other maint. that goes with it

 

[Bsturkie]

Re: Impeller Replacement?

I have a Volvo Penta and the impeller runs about $30-$40. Its really easy to change on my motor so I have no excuse for not making sure its in top shape. When I purchaced the boat, the old impeller blades were gone! Where do you think they ended up? In the heat exchanger, clogging many of the heatsink passages. So I had to remove the heat exchanger and clean. About a 2 hour job + 1 gasket. So save your self some trouble and replace it if you have any signs of wear.

 

[Mischief Managed]

Re: Impeller Replacement?

Gotta agree with lilmandavis. Mine was supposedly replaced last year, according to the dealer that sold me the boat. Ran perfectly all season and I never suspected any issues. I replaced it a couple of weeks ago as a preventative measure and the impeller had missing blade parts. Glad I looked.

 

[8x56mn]

Re: Impeller Replacement?

OK I have a question regarding changing the impellor on my 1981 MC I/O 4.0 140 hp. How big of a job is this. Mine doesn't show any problems, but I know sooner or later I will have to change mine out. Does this require you to pull the lower unit. I have been reading posts about doing that. Is this something that I can do in my shop by myself, do I need a chain fall or hoist. Just looking for a opinion on degree of difficulty.

 

[crazy charlie]

Re: Impeller Replacement?

8x56mn,it is best to do your own post.You will get many more direct replies that way.If your drive is a mercr. alpha or pre alpha,it is a pretty straight forward job,fairly easy change to do.The drive has some weight to it so the use of a hoist really depends on you.I have never used one but can see where it would be hard to handle for many.

 

[Bondo]

Re: Impeller Replacement?

The Whole Outdrive weights 80lbs,..........<br /><br />The lowerunit is just alittle Soggy,.... Maybe 1/2 the Total,.... Or Less.......<br /><br />I think the Mercstuff website has a Pretty Good walk thru of the Whole Deal........<br /><br />Overall,... It's a 3,....... Realigning All the pieces for the Last 1/2" going Back together is the Only Real Sticklier...........<br /><br />Sorry Charlie,............ You're Right,.... This Should be a new thread,.........<br />But,.... I recently discovered that 8X56 is an Ole' HomeBoy,...... That I haven't met Yet......

 

[8x56mn]

Re: Impeller Replacement?

Sorry and thanks, I'll remember next time.