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View Full Version : Impeller 8 fin vs 10 fin, is there a difference?


PolarBear
06-22-2011, 10:07 PM
I am changing my impeller out and I notice that the one I took out has 10 fins but the new one I ordered had only 8. I kept the one I took out before I put in the 10 and that has only 8. Anyone know the difference or if it would effect the performance? Didn't seem to matter the last 2 years but I don't like seeing differences and not knowing what it can do. Thanks!

east tx skier
06-23-2011, 02:34 PM
The difference is 2. :)

Sorry for not being helpful, but you're welcome for the bump.

/Yay! Smilies are back!

Thrall
06-23-2011, 04:48 PM
Never counted th fins and I've replaced a bunch of impellers.
Johnson 812 I believe is the one that is reccomended.
Maybe look at the skidim site, they have pics of their parts. Possible another model fits in the r/w pumps?

PolarBear
06-23-2011, 11:34 PM
You're killing me east tx.

east tx skier
06-24-2011, 11:09 AM
I'm like Thrall. Just get the correct model/brand of impeller for the best price you can. As long as they keep you around 160 degrees, that's good enough.

1redTA
06-25-2011, 04:55 PM
shouldn't be any difference in performance as it will still pump the same volume per rotation just a bit more volume between fins with 8 than 10

bigmac
06-25-2011, 09:39 PM
Johnson 812 impellers have twelve fins. Don't know about Geckos.

Jesus_Freak
06-26-2011, 06:05 AM
shouldn't be any difference in performance as it will still pump the same volume per rotation just a bit more volume between fins with 8 than 10

As long as the fins form a perfect seal with the inside of the housing, fewer fins would be more efficient: There is less disruption of the flow to the housing by the passing of fins.