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Author Topic:   Fuel Gauge Replacement 1988 Temptation
Venge posted 11-05-2006 07:32 PM ET (US)   Profile for Venge   Send Email to Venge  
I was surfing the internet to find the correct replacement for the fuel gauge mounted in the 1988 Temptation 2200 that has a 77 gallon tank under the deck and a 454 big block Mercruiser.
I started seeing that some gauges were designated for GM/Ford and some in Ohms so I thought I would check here before I bought the wrong one. The one that is in there now I had to keep tapping it to make it move and the needle seemed to stay reading full for the longest time and then just drop to empty, so I was hoping to do better.
Thank you
Boatplans posted 11-05-2006 11:14 PM ET (US)     Profile for Boatplans  Send Email to Boatplans

Talk to Ray Anders. He knows.

Venge posted 11-06-2006 10:10 PM ET (US)     Profile for Venge  Send Email to Venge     
Thank you boatplans,
I'll shoot him an email and ask him.
jimh posted 11-06-2006 10:19 PM ET (US)     Profile for jimh  Send Email to jimh     
The gauge and its sender have to coordinated so that the resistance in the sender matches the current rating of the gauge. Another variable is the direction of the meter movement. Some tank level gauges have meter movements which are at full scale on the left, just the opposite of a normal meter.
Tom W Clark posted 11-06-2006 10:36 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
The original equipment in a 1988 Temptation 22 did not include a fuel sender or a dash mounted fuel gauge. The gauge was mechanical and was mounted in the top of the fuel tank and visible through a clear deck plate in the floor of the cockpit.

The non-linear movement of the fuel gauge is typical of these boats and is caused by the fact the sender is not necessarily in the middle of the fore and aft length of the tank and the fact that the tank does not typically sit level while the boat is floating. The bow is higher than the stern.

The net effect is that the fuel gauge will read FULL until quite a bit of fuel has been burned off. Once the needle starts to move, it goes down rapidly.

The fuel gauge in the 140 gallon tank of my 25 foot Whaler reads 1/2 when I have only 45 gallons of fuel left and it will read 1/4 when there is only about 20 gallons left.

The gauge is consistent however. Once its behavior is learned, it becomes a very reliable instrument. The simple mechanical nature of it also contributes considerable reliability compared to an electric remote gauge.

If you really want accuracy, buy a fuel flow meter with a totalizer to keep track of how much fuel has been burned and how much is left.

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