48 Sundancer water tank design? PLEASE HELP

Chicago_48

Chicago_48

New Member
Nov 22, 2016
28
Chicago, IL
Boat Info
2006 48 Sundancer
Engines
Cummins QSC 8.3 HO's @ 540 HP
I've realized the fresh water tank on the 48 dancers is "L" shaped and with the sensor on the very top my level indicator is dropping from full to 3/4 after only a few gallons of use, and then from 3/4 to 1/2 and subsequently to 1/4 after only small usages of water. So for most of the tank's usefulness of fresh water the level indicator is living on the 1/4 tank reading.

Does anyone know of a workaround or different level indicator system that can be used to mitigate this issue?
 

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Id I'm not mistaken, the senders are not rheostats like a fuel gauge, where the needle moves smoothly down the scale as the float sensor move down the rod, the tanks have 5 marks or like a holding tank have separate rods that indicate Full, 3/4, 1/2, 1/4 empty. The minute the water is not touching the full sensor the tank reads 3/4 and so on until the tank reads empty and you will find you still have about 5 gals to use when first reading empty. I had an 2007 48DA. The 540 is the same and something you just get used to.


Rich
 
The issue is, I don't want to "get used to" the tank basically always reading 1/4 until it reads empty. Because of the L-shaped design the level indicator markings don't equally represent each increment of capacity.
 
I deal with the same issue and like Rich said, I just got use to dealing with it and how much water a 1/4 tank provides.

JB
 
Wow. Sucks. What a poor design. I would usually fill up a boat upon hitting the 1/4 mark but in this case that would mean almost a constant need to fill the tank.
 
I don't have that boat but could you adjust the prob lengths on the sending unit possibly?


Sent from my iPhone using Tapatalk
 
You can replace with ultrasonic sending units. http://www.queclink.com/fuel-sensor

There are many on the market. Another kind have a long pcb within a stainless rod with a float around it carrying a magnet to complete the circuit. You need a lot of room above to drop these in.
 
Tank Tender is a very accurate system.
 
Not sure of the name but there is a type of gauge that has stick on sensors that you place on the outside of a plastic tank and they can read thru the plastic. You determine where the appropriate levels are at and then stick on that levels sensor in that position. I wish I could find the supplier for you but my search came up blank for now.
 
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