Check your Macerator pumps

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bob776	Check your Macerator pumps		Lead	[-]
Posts: 119 10/18/07 08:42:43	Tags : None I was attempting to empty the forward holding tank recently and while the macerator pump started, it immediately started running slower and slower and finally stopped after about 10seconds. My first thought was a clog. Of course this could only happen with a full tank. Anyway I removed it (Jabsco) and discovered the pump was not plugged, instead it was binding up. There are 4 bolts that go through the intake nozzle and through the pump to hold them to the motor. One of the bolts had corroded through completely and two others we about to let go. These bolts are exposed to the head effluent inside the nozzle. While 3 bolts may hold the unit together, it causes the pump shaft to bind if one is missing Bob 776
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azure42		#1	[url]	[-]
Posts: 317 10/18/07 11:03:29	Bob, Your note came at just the right time. Our forward macerator just started exhibiting those exact symptoms during a recent trip off-shore. I assumed it was a clog because it started out working fine, then after about 2 minutes, it bogged down. If I shut it off, then tried again, it would run fine for about 30 seconds each time before bogging down. I was resigned to changing the pump (another Jabsco throw-away-don't-repair item), but I'll check the bolts and maybe get away with just replacing a bolt or two. Thanks. Rod Williams Azure' #343, 2-cabin fin Alameda/San Francisco Bay, CA.
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bob776		#2	[url]	[-]
Posts: 119 10/19/07 04:36:00	Rod: My use of the word "bolts" was to simplify may explanation. Actually they are studs and don't appear to be removable. Bob 776
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azure42		#3	[url]	[-]
Posts: 317 10/19/07 05:03:11	Thanks, Bob.........I guess it's back to plan A, replace the unit. I changed both macerators in 2002 -- with the very light use they've had, it would seem 5 years isn't a very long life. Rod Williams Azure' #343, 2-cabin fin Alameda/San Francisco Bay, CA.
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rbetzing		#4	[url]	[-]
Posts: 60 10/19/07 05:33:08	Has anyone found a more durable macerator pump than the Jabsco? I am looking at my second replacement of the forward macerator in 2 years. Not a fun project. Ron Desperado 2000 C42/2 cabin #708 San Diego, CA
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nickwigen		#5	[url]	[-]
Posts: 215 10/19/07 07:08:47	I put a Sealand pump in our previous boat that ran perfectly for 6 years. One day I had a brain cramp and flushed a paper towel down the head to the holding tank. It made it through the pump just fine and finally clogged the thru-hull that was slightly smaller than the pipe. It can run dry. When the pump on Ursa Minor fails I will replace it with one of these and put in a wind-up type bathroom fan timer. It will require changing some plumbing and maybe a larger thru-hull. On the other boat the head direct discharge and the macerator used the same 1 1/2" thru-hull. http://www.boatersworld.com/product/358730240.htm Nick Wigen Ursa Minor #178 FK, 3-Cabin Portland, Oregon
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symandalay		#6	[url]	[-]
Posts: 127 10/19/07 11:47:22	You can get a rebuild kit for the macerator we have on our boat and it is actually not that bad a job to install it. New cutters, seals, etc. I installed them myself and they are Johnson Pump - I know one has the West Marine name on it. I found the rebuild kit on Ebay for about $15. I think you could disassemble and rebuild the pump in place without disconnecting the hoses from the ends if you can get at it on your boat. Best to do it when the holding tank is empty!! Colin Last Edited By: symandalay 10/20/07 11:15:38. Edited 1 time.
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davidirvine		#7	[url]	[-]
Posts: 56 10/19/07 23:55:42	Rod The studs are replaceble. You can get them from Jabsco for about $10 for four. David 492
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azure42		#8	[url]	[-]
Posts: 317 10/22/07 11:56:53	Thanks Dave. Next time I'm on the boat I'll check to see if this is the problem. Rod Williams Azure' #343, 2-cabin fin Alameda/San Francisco Bay, CA.
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Joe		#9	[url]	[-]
Posts: 47 10/24/07 09:39:46	I just replaced my 2 original Jabsco macerators. The original ones just made noise and didn't pump out anything. I found new ones online at a good price, but I'm disappointed the original ones didn't last too long. The thought of rebuilding them wasnt pleasant. Replacing them is bad enough! I used plastic bags held over the end of the PVC pipe by the hose clamps to keep the smell down while I was working. Have a bucket ready to catch any overflows! The whole job took less than an hour and I used the original pipe junction at the bottom of the pump to save rebedding all the pipes. It works great now. Joe - 2004 C42 mk2 #872 3C/L - s/v Sea42 - sector San Francisco
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philip vizzini		#10	[url]	[-]
Posts: 46 10/24/07 10:11:31	my aft macetator pump just stopped working. It will hum for 15 seconds then stop. I never really used it as I just bought my boat this past june 89 pullman where exactly is the pump I did find the seacock under the aft starboard bunk.Any suggestions would be great. Phil vizzini second wind #95 annapolis
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