I checked the impeller on my Sherwood water pump and it was OK, but I am unclear how to reassemble it. Here is a diagram of the design.
http://www.marinedieseldirect.com/catalogs/catalog_group.php?owner=mdd&page_ident=200144-51&model=M4-30%20/%20M4-30A&manufacturer=Universal&title=Sherwood%20Water%20Pump&quant_position=&catalog=200144&printparts=&printservice=&printoperators=&comment1= 1. It is unclear to me which way it rotates. I am guessing it would rotate such that the vanes are moving from the inlet opening toward the outlet opening, but otherwise I don’t know how to tell. 2. I watched some YouTube videos about reassembly to get the vanes bent in the correct way and nothing I have seen describes this “new style” pump. The screws on this one come in from the rear (PITA to remove) and the key shaft are on the engine side. The housing comes off with the tubing. The videos describe rotating the impeller onto the staft in the correct direction while inserting the impeller into the housing. But with the housing and shaft on different parts of the pump, you can’t do that. I am guessing that you would put the impeller on the shaft and then somehow try to bend the vanes as you push the housing over it, but that seems like it will be really hard to get all the vanes right, especially because you can’t see them once the housing starts to cover the impeller. I am hoping there is a “trick” to doing this that I am missing. Thanks- Dave Aries 1990 C&C 34+ New London, CT
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