Single vs dual fuel gauge sending units.

[larryeddington]

I have new fuel tanks from SP tanks not installed yet. It just occurred to me that SP and I never discussed the need for dual station sending units in the tanks. A check with SP says they always use single ones and a marine electrician would be of help. They have double ones in stock and I have offered to pay shipping and difference in cost. Not heard back yet.

Can the sending signals be attunated or amplified to accomplish the dual station gauges. I really do not think so.

More research on this fuel gauge thing. It appears that 240 ohm when full is the industry standard now. My old sending units read 120 ohm on full. Apparently there may be no special dual fuel tank gauges, they are wired in parallell and both fly bridge and salon controls are on when engines running and sample the same ohm reading.

Thoughts

[larryeddington]

Okay I admit I am a complete DA. There is not fuel gauge in the Fly Bridge gauging, Volts, Oil Pressure, Temp and RPM for each engine.

I took a wet rag up there and wiped them all off and the above is a truism, so all I will need is two new fuel gauges for the bottom helm. Oil and temp definitely do have dual sending units. to myself.

[jefflaw35]

BAHAHAHA you goof!!! to much dust on that girl!!! AAnd your telling me to be worried about renaming LOL

[Big D]

....Can the sending signals be attunated or amplified to accomplish the dual station gauges....

Larry, to answer your question, it is possible; using OHM's law, a resistor color code, and a couple of resistors will get you pretty close but if one does their homework when buying a gauge or sender, no need to mess with Mr. OHM

[larryeddington]

nope setteling for fuel gauge at salon helm, no need for other.

[larryeddington]

duplicate entry, disregard