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Old 29-03-2021, 13:26   #31
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Re: Impeller Longevity

I know this is a 4 year old thread but it fits perfectly with some thing I have been concerned about.
My dock mate has a mid 80s Yanmar 2GMF just like mine. Last year his recirculating water pump, the one with the metal impeller failed.

The bearing had disintegrated and destroyed the pump.A new pump from Yanmar was $600 cnd!
It would be much cheaper to rebuild this pump and install a new bearing before it fails and damage's the shaft etc.
Is this a fairly common failure? It seems like replacing a 35 year old bearing would make sense.
I did the fresh water pump using an $85 dollar kit from Yanmar. it worked much better after that.
This is what it looked like.
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Old 29-03-2021, 13:54   #32
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Re: Impeller Longevity

I used the search function with "impeller life" and it brought me here.
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Old 29-03-2021, 14:03   #33
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Re: Impeller Longevity

Quote:
Originally Posted by kmacdonald View Post
I used the search function with "impeller life" and it brought me here.

Cheers. There's nothing wrong with reviving old threads, when they are still relevant.
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Old 29-03-2021, 14:05   #34
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Re: Impeller Longevity

Quote:
Originally Posted by Gary Mc View Post
I know this is a 4 year old thread but it fits perfectly with some thing I have been concerned about.
My dock mate has a mid 80s Yanmar 2GMF just like mine. Last year his recirculating water pump, the one with the metal impeller failed.

The bearing had disintegrated and destroyed the pump.A new pump from Yanmar was $600 cnd!
It would be much cheaper to rebuild this pump and install a new bearing before it fails and damage's the shaft etc.
Is this a fairly common failure? It seems like replacing a 35 year old bearing would make sense.
I did the fresh water pump using an $85 dollar kit from Yanmar. it worked much better after that.
This is what it looked like.

Those are fresh water pumps -- a very different animal.


I carry spares of those for both main and generator. I would not mess with rebuilding them, personally -- you can get aftermarket fresh water pumps pumps for reasonable cost.
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Old 29-03-2021, 22:21   #35
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Re: Impeller Longevity

Berth neighbour has had his impeller in for over 7 years, Probably does about 100 hrs per year. Our current one has done about 400 hrs but I have a strainer after the pump to sieve out vanes if it busts. Probably better to replace on schedule though.They can fail at awkward times.
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