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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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  #1  
Old 07-27-2009
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oberdorfer impeller

Hello,

In the spring I installed a new impeller on my raw water pump (Universal M25 with Oberdorfer pump). I did this because the vanes on the old impeller were cracked (impeller was installed some time before 2006 when I bought the boat).

Today I started the engine and noticed very little water flow out the back. After I removed the cover I saw that most of the impeller blades had cracked and / or torn off.

I have another spare, but I'm hesitant to install it, since I don't know how long it's been sitting around.

Who makes the best impellers for this engine? I see that Defender sells a Neoprene unit for $28, and various models from Globe that are 'run dry' and much more expensive (about $55).

I don't care about the price, I just want the best impeller. Any suggestions?

Thanks,
Barry
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Old 07-27-2009
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Don't forget to find every piece missing. It may become blockage at the worst time, in the worst place........i2f
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Old 07-27-2009
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I just went ahead an bought an OEM impeller for the Oberdorfer on our boat's engine. After researching it, that seemed the best way to go.

Jim
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Old 07-27-2009
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You might want to check the brass shoe that is folds the blades back (held in place by a small screw on the outside of the housing). If it is worn funny, there is a chance that it mangled your impeller.

As well, I would check the strainer. It seems unlikely to be destroyed in such a short period of time unless the impeller was poorly made or you picked up something.
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