I have a couple spare impellors but no spare o rings for my raw water pump. I tried BUS and a couple other marine/hardware stores and looked in the defender catalog with no luck. I'll try Depco tomorrow. Any other ideas?
Ken : Depco will have what you want, but as we've posted a number of times they cannot give you any break in price.
Sherwood discount NOTHING. :cry4`
Did a google for O-rings. Found www.gaskethouse.com the web site for Sutton Clark Supply in Richmond, VA. 1-800-848-8311 Very helpful on the phone, I found out that O-rings for "squash" type applications like the raw water pumps are made from straight stock, cut to length and then the ends are super glued together to from the "ring". My daughter happens to work just up the road from their warehouse. Sent her my o ring, she dropped by, spent about 10 minutes waiting and left with a new o ring and a spare. :clap She was planning a visit with us anyway ortherwise I'm sure I could have done it all by mail or by giving them the precise measurements on line or on the phone. She didn't tell me how much they cost, I'm guessing under $1, she would have asked for reimbursement otherwise. I never did get around to checking with Depco, but I'm guessing Sutton Clark beat their price.
Ken
Do you have a Speed Seal?
Ken : It sounds like a good deal, but you have to be careful CALLING in. You need to always ask a few questions:
Many of these places have a minimum charge of $25 of merchandise. Think they do that because of the credit card??
Another item to check is the minimum shipping charge!!
I called to order a $4.00 pack of teak plugs from West Marine last week only to find that their minimum shipping charge was $6.95 !?! At that price, I'll wait and walk into the store for those plugs.
Stu : If you buy a Globe Co impeller (#815 for your Oberdoffer) you won't need a "Speed Seal" because the blades on mine have lasted for many years!! I only check mine at layup in the fall. Maybe you Left Coast Guys that sail 24/7/12 need a speed seal $$ set up to check your impeller ONCE a year (smile). :think
Ron
We have an Oberdorfer. The only reason I asked about the O ring was that I didn't know if the Sherwood has a paper gasket like the Oberdorfer, or whether it's only a Speed Seal that would need the O ring.
Hi Stu,
No I don't have the speed seal. The Sherwood has a paper gasket between the block and the base plate and the o ring between the base plate and the pump housing. I'm still running a rubber impeller, have a globe as a back up. When the rubber goes, it will be the blue globe from then on. I did not get an o ring with the globe impeller, not sure if thats how they come or they just forgot to put one in the box. That was the reason for the O ring search.
Ken,
I'm about to change my impeller on my "new" Sherwood pump. I have the spare with what looks like a paper gasket.
Do I need to change the o ring?
And what's the "globe" you mentioned?
Thanks a lot.
Hawk
Hawk : If you are only changing the impeller you won't need a "paper" gasket as it's the one between the part of the Sherwood that mates to the engine.
If you need a new "O" ring you can go to Depco, Westerbeke or Sherwood. I found that the impellers are cheaper from Westerbeke than Sherwood or Depco.
My list of manufactures telephone numbers is posted on our web site. A thought
I bought them at Torresen and Marine Parts Source. Might also try Pump Agents.
Globe is a company that makes impellers out of a slippery plastic instead of rubber. They have a run dry guarantee of 15 minutes. I think I got mine through Defender.
I think this is the correct impeller for the Sherwood pump from the Defender site. Will double check when I get to the boat Saturday.
Impeller
Item #: 301959
Manufacturer: GLOBE
Model #: 610/ 01-12-1440
Shipping Weight: 0.10 Lbs.
Our Price: $55.99
Ken is correct on the impeller number and the price, but don't forget the shipping $$ !!
Defender is the only marine chancellery that I know of that stocks Globe impellers. Globe will NOT sell direct.
Ken/Ron,
OK I'm confused and should have read Ken's post more carefully.
My Sherwood impeller package had an impeller, 2 o rings and the gasket. There was no gasket - only the o ring when I removed the 3 bolts threaded in from the back and popped off the cover. Thinking the last change missed installing the gasket, I took the new one and it fits perfectly with 3 holes for the bolts. In goes the o ring and back together. And all seemed well. The pump is the version with the two ports out one side which I think Ken has. This is a picture from another thread.
http://home.comcast.net/~johnkountz/images/Sheerwood.jpg
Do I have to take that gasket out tomorrow morning before I leave for 5 days? How could it fit so nicely? I gotta lay off the Canadian beers!
Thanks for your earliest comment guys.
Hawk
If I remember correctly, the O-ring goes into the grooved slot on the cover. Then the wear plate captures the impeller against the cover, the O-ring makes the seal between the cover and the wear plate. On the other side of the wear plate is where the paper gasket goes. The paper gasket is between the wear plate and the pump body.
Roc has it right. O ring in the groove seals against the back plate (wear plate). The paper gasket goes between the back plate and the pump housing.
Thanks guys. Maybe its a wear plate I'm looking for as it wasn't evident to me when I changed the impeller yesterday. Could it be missing? If so, I ought to have seen leaking I expect.
I'm going back now to take it apart. Thanks for any more feedback fellas.
Hawk
This shows a parts breakdown: http://www.marinedieseldirect.com/catalogs/catalog_group.php?owner=mdd&page_ident=200142-58&model=M-25%20/%20M-25XP%20/%20M-25XPA&manufacturer=Universal&title=Sherwood%20Water%20Pump%20-%20New%20-%20302648&quant_position=&catalog=200142&printparts=200142&printservice=200151&printoperators=200157&comment1=This%20pump%20is%20no%20longer%20available%20as%20a%20complete%20stand%20alone%20pump%20unit%20(302648%20-%20NLA).%20%20Use%20this%20diagram%20to%20order%20replacement%20parts%20for%20this%20pump.%20%20To%20replace%20this%20pump,%20order%20kit%20number%20302837(kit%20includes%20a%20replacement%20pump).
Craig
Thanks Craig. Thats helpful.
Guys : There is NO paper gasket between the face plate and the impeller housing on a Sherwood raw water pump - there is on an Oberdoffer. There is a "thick paper? gasket" between the Sherwood pump and the engine.
What seals the face plate on the pump housing (impeller inside) is an "O" ring.
On the newer Sherwood #908 pumps is that the "O" ring seals the pump (bronze) housing to the pump body(iron w/bronze plate in between!!) by 3 bolts. Those design engineers had their head up their "you know what" because the 3 bolts are threaded to the pump housing from the inside.
One step forward and 10 steps back!! A thought
I took the Sherwood pump apart again and relying on Craig's parts breakdown drawing it does appear that a gasket fits between the wear plate and the pump body. Of course the 3 gasket holes fit the bolt positions but I did not see any reason to change dthe gasket. So I removed my mis-positioned gasket. and all is well.
It all started when I sucked something up the raw water intake as I left the outstation and noticed quickly a reduced water discharge. After limping back to dock, I removed the hose from the water strainer and cleared the obstruction with my trusty coat hanger. I thought it might be prudent to change the impeller as it likely ran a little dry.
Just for information, yesterday I motored for 1.5 hours at 2400 rpm and the temp gauge was steady at 170 degrees. I have an M35 with 3 blade prop.
I appreciate all the good advice fellas.
Hawk
You guys are all lucky enough to have your pumps last long enough to need to change the impellers. The impellers have all been perfect on the last three that I have replaced with bad seals. I am getting good at switching pumps though, can do it faster than changing the impeller. :?
By the way I should have said that the sherwood impeller I removed looked just fine even though it likely ran dryish for 10 minutes...it went to the emergency spare box.
Jack : You need to get a Globe "blue rubber" impeller. Then what I do is reverse it the next year so the blades don't retain a "set".
Hawk : If your impeller you took out is "black rubber" I'd recommend that you spray it with silicone. Then put it in a zip lock bag so it won't dry out and become brittle!!
Ron,
Great point. I had read that previously but forgot to do it on the weekend.
Ron, my spare impeller that I have yet to use is a blue Globe. Maybe the seals on this pump will last long enough to use it! One interesting thing when I changed out the pump this time I also cleaned out the raw water intake strainer (which I check on a regular basis) I completely drained all the water out of the strainer housing. I found a layer of "silt" in the bottom of the housing that I had not noticed before. It may be possible that the water in our area contains a lot of silt that is playing havoc with my pump seals. We do have several glacier fed rivers nearby, just maybe ... :think