#1
IP: 108.21.63.119
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Impeller minutia...
From an older thread:
Quote:
I've been wondering if the molded protrusions, or bumps are intended to provide "lubrication" (water) between the impeller and one of the pumps surfaces. But which one? I have seen impellers installed in both directions but I would think that the engine side of the pump would benefit more from the additional lubrication provided by the small protrusions. Last edited by jstaff; 05-16-2014 at 08:58 AM. Reason: Typo |
#2
IP: 99.124.190.130
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I don't think it matters.
I think those bumps are just residuals from the molding, and whether they're against the cover plate or the inner wall won't make any difference. Both those surfaces tend to wear. When the cover plate is shot, a new one is cheap. When the inner wall is gone it means a new pump. Hey, stuff wears out. Fortunately, my knees haven't given out yet (in spite of years of competative bike riding). Noticed the Mystic Seaport Antique Boat Show this year is for boats prior to 1970. Wonder if this means my Tartan 30 (1973) will qualify in 3 years?? |
Tags |
bumps, dimples, impeller, lubrication, protrusions |
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