Water/Waste Tank Monitor 2665

General repair/maintenance/upgrade information exchange.

Water/Waste Tank Monitor 2665

Postby ZacUSNYR » Thu Aug 31, 2017 11:41 am

On my new to me 2004 2665 - I have a dual rocker switch for waste/fresh water tank monitoring. It doesn't work. I could have sworn the fresh water was working when we water tested the boat but after emptying/filling, the needle barely moves.

I search this forum and I see a lot of people with the same problem and a lot of just replace the whole system if you need it answers. But nothing really tells me what direction to head in (what system to replace it with?). What's compatible with my existing tanks?

How does one access the water tank? I found one post saying it's under the v-berth floor. Are the screws under the button snaps?

So for those who have re-engineered this system. What have you done? What is install like?

Does anyone know what breaks on the OEM system to cause it to stop working?
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Re: Water/Waste Tank Monitor 2665

Postby Rpontual » Thu Aug 31, 2017 4:23 pm

ZacUSNYR wrote:On my new to me 2004 2665 - I have a dual rocker switch for waste/fresh water tank monitoring. It doesn't work. I could have sworn the fresh water was working when we water tested the boat but after emptying/filling, the needle barely moves...


If your system is like mine, to measure the fresh water tank level you need to press and hold the rocker switch for a long time. In my case I was so convinced that I had a problem that I had a technician verifying it. I suggest you to press & hold the the rocker switch for 60 seconds or so. As soon as you press it the needle moves, but after several seconds close to 60s it moves again to the right position.

The waste tank behavior seems different. It seems to start measuring after the tank has "plenty of resources". ;)
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Re: Water/Waste Tank Monitor 2665

Postby ZacUSNYR » Fri Sep 01, 2017 8:08 am

Have not tried holding it for awhile. I will try that tomorrow while on the boat.

Thanks!
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Re: Water/Waste Tank Monitor 2665

Postby Chris_in_Texas » Fri Sep 01, 2017 4:14 pm

The older boats used a traditional float based system where as the 35SC uses something a bit different for the freshwater. Its an electronic based unit that needs to power up and then read, although 60 seconds seems like a long time. Mine would do a full deflection and then zero and then come up to the correct level. In about the speed you could read that sentence. Also you can't be putting water into the tank when you do that as it has to be somewhat still to read correctly.
Thanks, Chris

2012 - Regal 35 Sports Coupe - Twin VP 5.7GiCE-300-P - DP-SA - SOLD
2011 - Sea-Doo RXT260s - 1503HO Rotax 4TEC
2007 - Regal 3060 - Twin VP 5.0OSi - XDP - SOLD
2002 - Crownline 230BR VP 8.2GSiPEFS - DP-SM - SOLD
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Re: Water/Waste Tank Monitor 2665

Postby Rpontual » Mon Sep 04, 2017 4:21 pm

Chris_in_Texas wrote:The older boats used a traditional float based system where as the 35SC uses something a bit different for the freshwater. Its an electronic based unit that needs to power up and then read, although 60 seconds seems like a long time. Mine would do a full deflection and then zero and then come up to the correct level. In about the speed you could read that sentence. Also you can't be putting water into the tank when you do that as it has to be somewhat still to read correctly.


Exactly. If the boat is on still water the measurement is faster. If the water is rough the read may never happens...
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Re: Water/Waste Tank Monitor 2665

Postby PipeDreams » Wed Jan 31, 2018 4:11 pm

My tank level monitor was bad when I purchased my 2003 3260. I searched and found an external monitor system from Tech-Edge in Oregon. Works great, and will never get clogged up as it is external to the tanks. :D
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Re: Water/Waste Tank Monitor 2665

Postby ZacUSNYR » Wed Jan 31, 2018 5:11 pm

I think I can access my waste tank but I have no clue how to get the floor pulled up up front to access the fresh water tank.
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Re: Water/Waste Tank Monitor 2665

Postby Chris_in_Texas » Wed Jan 31, 2018 5:40 pm

Most of the time you can't access the tanks fully without cutting things up. On my 3060 the tank was below the floor and you would have to cut out the floor in the cabin to get to it. There was a very small amount of it accessible from under the stairs.

Same issues with the gas tanks in my 35SC. One of them is buried on the port side and would take cutting out the cockpit to get to it if you actually had to get access to the whole tank. The SB tank you would need to cut a few access holes to get to the bolts but if you removed the SB engine and genny you could get it out. There was no access to the SB fuel sender either to get it out of the tank you have to cut a hole in the cockpit floor which is a horrible design considering that they do fail and its almost a maintenance item.
Thanks, Chris

2012 - Regal 35 Sports Coupe - Twin VP 5.7GiCE-300-P - DP-SA - SOLD
2011 - Sea-Doo RXT260s - 1503HO Rotax 4TEC
2007 - Regal 3060 - Twin VP 5.0OSi - XDP - SOLD
2002 - Crownline 230BR VP 8.2GSiPEFS - DP-SM - SOLD
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