fuel gauge -- any suggestions? - Page 2 - SailNet Community
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post #11 of 25 Old 10-05-2009
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Tempo does great mechanical and electrical gauges; easy to install and fair prices. I had also a wood stick attached on top of tank, where I unscrew it to "read" the wet part, but not practical. Last boat I installed a pipe on very botton, and another on very top of metallic tank, then connected both through a clear hose. I could see the fuel level on-line without any action. PS: I have Tempo electrical installed as well.

Nave Rara
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post #12 of 25 Old 10-05-2009
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That type of gauge sounds like the ones that used to go in Hatteras boats. Goes in a a standard size hole the same size as a 55 gallon drum. You can get this sending unit from Dog River Marina In Mobile Alabama, USA they have a website. Mine with elec conversion cost $275.00
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post #13 of 25 Old 10-05-2009 Thread Starter
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Sounds like what what the doctor ordered. All I have to do is check the existing mechanical fixation to see whether this or one of the other possibilities can be adapted without a lot of fussing about.

If I can do this without removing the tank it will be a real winner.

Thanks to all who replied.

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Originally Posted by rikhall View Post
Pegasus

Here is the link to some documentation and pictures of my fuel system upgrade, including the Wema fuel gauge and sending unit that I installed. No float arm, a vertical float instead. I love it.

Irwin Citation 34 - Fuel System Upgrades

Rik

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post #14 of 25 Old 10-07-2009
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I've been considering putting together a tank level indicator by making up a plastic manifold using push-in fittings and plastic valves. One valve goes to fuel, one to holding, one to water. A port on the manifold goes to a fuel bulb from an outboard. A final port goes to a clear u-tube with water attached to a bulkhead with an adhesive scale next to it. You open the valve for the tank you want to read and squeeze the bulb until the water stops rising in the u-tube because it is bubbling out in the tank you are reading. The difference in the two water levels is the depth of liquid in the tank.

I started using this kind of manometer to measure differential pressure for air flow measurement because we kept losing the damn Helicoid gauges due to corrosion from water vapor. The u-tube manometer is bulletproof.

Gary H. Lucas
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post #15 of 25 Old 10-08-2009
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The system roline describes is pretty much the standard. Simple and reliable and the parts are interchangable between manufacturers. Total cost of about $50-60. The that was original equipment on my boat ran great for 27 years until I had to replace the tank sender at a cost of $40. Can't beat that.

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Originally Posted by roline View Post
I installed a fuel gage system, sending unit in the tank and 2" round display in the cockpit. The boat had this system but always read Empty. I went through and replaced the system to restore functionality. The system cost at the time was around $40. 35 to 240 ohm system is standard. If you are interested, check out the link below:

9.2 fuel


It has been over 6 yrs and it is still working well. I would use engine hrs, but that would require cruising at the same burn rate. I get around 37hrs on 11 gallons, but that was at 2,800 rpm. It is time to top it off for the winter season, a little cetane stabilizer and bio additive to keep the diesel bugs out.
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post #16 of 25 Old 10-13-2009
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Quote:
Originally Posted by roline View Post
I installed a fuel gage system, sending unit in the tank and 2" round display in the cockpit. The boat had this system but always read Empty. I went through and replaced the system to restore functionality. The system cost at the time was around $40. 35 to 240 ohm system is standard.
So here's a question:

I have 5 tanks, two fuel and three water. I want only one guage on my console. So. . . .
  • will the tank unit shown work on a water tank as well as it does in a fuel tank and how long before it rusts away?
  • Can these units with their low resistance be switched through a rotary switch to provide feeds from 5 different tank units to one console instrument?
I have, as said in my earlier post, been toying with automotive tank units and the ones that I have are predominently plastic. I was hoping that this would be a little corrosion resistant. They are also freely available from wrecking yards for a few dollars.

Any thoughts?


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post #17 of 25 Old 10-13-2009
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Ditto on the Wema unit

It is a beautifully designed sender unit. I hated to hide it in my fuel tank

Appears to be much more durable than the cheap units found in most stores.
The cost seems very reasonable, especially after looking at the unit up close.

Quote:
Originally Posted by rikhall View Post
Pegasus

Here is the link to some documentation and pictures of my fuel system upgrade, including the Wema fuel gauge and sending unit that I installed. No float arm, a vertical float instead. I love it.

Irwin Citation 34 - Fuel System Upgrades

Rik
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post #18 of 25 Old 10-14-2009
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Quote:
Originally Posted by Omatako View Post
So here's a question:

I have 5 tanks, two fuel and three water. I want only one guage on my console. So. . . .
  • will the tank unit shown work on a water tank as well as it does in a fuel tank and how long before it rusts away?
  • Can these units with their low resistance be switched through a rotary switch to provide feeds from 5 different tank units to one console instrument?
I have, as said in my earlier post, been toying with automotive tank units and the ones that I have are predominently plastic. I was hoping that this would be a little corrosion resistant. They are also freely available from wrecking yards for a few dollars.

Any thoughts?
The short answer is yes. As long as all the sensors are of the same standard type. Problem may be finding sensors of that will work in a water tank. The fuel tank sensors have a varible resistor that is in the tank and exposed to the fuel. Water may short these out.
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post #19 of 25 Old 10-14-2009
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Water tank issue

Water tank shouldnt be an issue with the Wema units. Stainless, no exposed wiring.

Fuel Tank Senders, Gas Tank Senders, Water Tank Senders, Holding Tank Senders by WEMA USA, Inc.

Quote:
Originally Posted by JimsCAL View Post
The short answer is yes. As long as all the sensors are of the same standard type. Problem may be finding sensors of that will work in a water tank. The fuel tank sensors have a varible resistor that is in the tank and exposed to the fuel. Water may short these out.
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post #20 of 25 Old 10-14-2009
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Another vote for the Tank tender, pricey, but very accurate and easy to install
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