AC water pump leak
- Thread starter SeaNile
- Start date
Alex F
Well-Known Member
- Nov 14, 2006
- 9,166
- Boat Info
- 2005 420DB with AB 11 DLX Tender, Raymarine Electronics (2x12" MFDs) with Vesper AIS
- Engines
- Cummins 450Cs, 9KW Onan Generator, 40HP Yamaha for tender.
Which brand is it? Check if they offer a rebuilt kit for the front end.
SeaNile
Well-Known Member
Dayton is the manufacturer. I’ll check it out for a rebuild kit.
- Jun 5, 2016
- 5,601
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
What pump model? Is that Dayton shaft driven? Picture doesn't really show enough to be useful. But, in that case you'll need a shaft seal.
That would be an odd pump for a Sea Ray. I think what was originally there is a March pump that has a magnetic drive...nothing to leak.
That would be an odd pump for a Sea Ray. I think what was originally there is a March pump that has a magnetic drive...nothing to leak.
Dayton is the manuf for electrical motors. The pump assembly is probably an Oberdorfer.
Over time, depending upon how well the pump is bonded and maintenance of the boat's anodes, the casting will develop pin hole leaks. These pumps really need their own zinc anode.
No recovery other than buying a new pump.
Over time, depending upon how well the pump is bonded and maintenance of the boat's anodes, the casting will develop pin hole leaks. These pumps really need their own zinc anode.
No recovery other than buying a new pump.
bahamabreisus
Well-Known Member
- Oct 25, 2007
- 2,555
- Boat Info
- 370 dancer, previous 500,420,390,300 dancers
- Engines
- 454 CI MPI
So yourself a favor, replace that thing with a March air cooled pump. The best place is Flagship Marine for pumps. We fought that Oberdorfer for years, finally bought the TE-5.5C-MD-3ph. Never had an issue again.
https://flagshipmarine.com/pumps/
https://flagshipmarine.com/pumps/
SeaNile
Well-Known Member
Not a bad idea although I wonder if a swap to a new Dayton would be much easier?
Not sure what March pump I would need. It'll take me a while to cross reference, etc.
- Jun 5, 2016
- 5,601
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
Not really. Its just a matter of adding up the water flow. What's connected to it? 1 or 2 AC's and what size?
SeaNile
Well-Known Member
4 units, 16k btu. All identical units, fwd stateroom, salon and 2 in the cockpit.
bahamabreisus
Well-Known Member
- Oct 25, 2007
- 2,555
- Boat Info
- 370 dancer, previous 500,420,390,300 dancers
- Engines
- 454 CI MPI
Dayton is the electric motor manufacturer only, not the pump itself. The pump head is made by Oberdofer. I am guessing you have 3 units like our 500, we put the 1680 on ours. I think had to change the output fitting, which we got at the local hardware store.
SeaNile
Well-Known Member
4 units
FootballFan
Well-Known Member
I went through this earlier in the year. Bonding wasn't great, pin holes. Replaced with new pump. New bonding on the pump.
Called out an electrician to do a bonding check through out the boat just for peace of mind and preventative. Electrician did not find any other issues, but was worth it to know.
bahamabreisus
Well-Known Member
- Oct 25, 2007
- 2,555
- Boat Info
- 370 dancer, previous 500,420,390,300 dancers
- Engines
- 454 CI MPI
We did the same thing, still ate thru the pump housing. Response we got was it was caused by cavitation. We went with the march and never has the problem again
bahamabreisus
Well-Known Member
- Oct 25, 2007
- 2,555
- Boat Info
- 370 dancer, previous 500,420,390,300 dancers
- Engines
- 454 CI MPI
I would call Flagship, they are very helpful. Let them tell you what pump to go with.
