FYI https://moyermarine.com/product/mmi-502-flange-pump-csob_00_365/
NOTE: For Universal diesel owners, if you you’re currently using an Oberdorfer 202M-3 or 202M-7 pump, or the newest version of these pumps with an “N” prefix, your engine will already have the necessary adapting hardware that is required to convert to our MMI 502 Flange Pump. If you’re currently using a pump with four bolts in its mounting flange, you will need one of our adaptor plates and a shaft adaptor to convert to an MMI 502 Flange Pump (see product numbers DIES_01_560 and DIES_02_561. CSOB_00_365 Joe Coquina From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dennis C. via CnC-List Sent: Thursday, March 29, 2018 2:20 PM To: CnClist Cc: Dennis C. Subject: [EXTERNAL] Re: Stus-List Universal / Westerbeke Sherwood raw water pump upgrade I'm still researching the correct pump. I've pretty much determined the issue with the Oberdorfer is the spacing between inlet and outlet when one tries to re-use the elbows from the Sherwood. There isn't enough clearance for the second elbow to swing past the first elbow. I think installing one of the elbows then cutting a bit off the barb on the second elbow is the solution. The Oberdorfer N202M-837 is simply an Oberdorfer N202M-908 with two short barb elbows and about $70 added to the price. The online pricing for the 908 varies significantly. Lowest so far is $326. Dennis C. Touche' 35-1 #83 Mandeville, LA On Thu, Mar 29, 2018 at 1:04 PM, Matthew L. Wolford via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote: I’ll need to see what I have, but I believe the pump on my Westerbeke 40 is the brass plate version you described. A significant problem with my pump is inadequate suction. We have looked repeatedly to see if impeller pieces were sucked into the system (found a couple). The suction is so weak that I need to do the funnel-from-on-high routine to get the system working after spring launch. I also sometimes need to do the funnel routine after being heeled over and bouncing around in bad weather. I would welcome a more powerful pump. From: Dennis C. via CnC-List<mailto:cnc-list@cnc-list.com> Sent: Thursday, March 29, 2018 1:01 PM To: CnClist<mailto:CnC-List@cnc-list.com> Cc: Dennis C.<mailto:capt...@gmail.com> Subject: Stus-List Universal / Westerbeke Sherwood raw water pump upgrade For those of us who have Universal or Westerbeke diesels that use the Sherwood G908 clamp mount raw water pump, here's some news. (The Westerbeke number is sometimes 42175.) Changing the impeller on the Sherwood is a bit of a pain because the bolts come in from behind. You can either remove the pump by removing the two clamps, or remove the pump case by removing the 3 bolts and lifting the case off. Then you have to make sure the o-ring is properly seated upon reassembly. Another issue with the Sherwood is that it often leaks. Unlike many pumps that have a shaft seal, the Sherwood impeller seals against a brass wear plate on the back of the pump. If the wear plate, which is fairly thin, bows outward or has excessive wear, the pump will leak raw water. In a salt water environment, this tends to have a deleterious effect on the engine front. I replaced the thin wear plate on my Sherwood with a thicker stainless wear plate that I found on eBay. That helped reduce a nagging leak. Although I don't need it yet, I found a drop in replacement, Oberdorfer N202M-908. This pump is a more traditional design with shaft seals. Access to the impeller is from the front by removing the cover plate. The Oberdorfer N202M pump has been around for many years and is a standard marine engine raw water pump. A version is used on the good old Atomic 4. It fits many marine diesels by being available in several models. The differences are in the mounts for attaching it to the engine. Some resourceful boat owners have modified Oberdorfer N202M-16's to fit the clamp mount configuration. Oberdorfer now offers the clamp mount as the 908 model. I found one thread on a Catalina owners site which questioned the pumping capacity of the Oberdorfer on an M-35 engine. I was not able to find the capacities of the two pumps but found many posts from boatowners who were using the Oberdorfer N202 series pumps on various Westerbekes and Universals successfully. The other good news is the Oberdorfer is a fraction of the cost of the Sherwood. I'm considering replacing the Sherwood with the Oberdorfer even though the Sherwood is doing fine....right now. Dennis C. Touche' 35-1 #83 Mandeville, LA ________________________________ _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
