fuel sending unit

J

jstrez5

Senior Member
can anyone tell me what these numbers 78-9275 that are stamped on a fuel sending unit are for and what year car. your help is appreciated thank you JIM
 
PETEHOOVIE thank you for that information my next question is would this model work in a 1939 ford deluxe. jim
 
Kube is correct, in that the sender arm needs to be "adjusted" so the float has clearance at each end of travel. I salvaged a KS sender from a '50 sedan, that I repaired and installed in my '46 Coupe. I had to adjust the arm to match the depth of the '46 tank. The "jobber" sender arm that was in the tank when I bought the car had been severely adjusted, and was not at all accurate.
 

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would anyone know the correct size float on a fuel sending unit for a 1937 ford the unit i have came without a float it is a used sender. thank you jim.
 
I believe that the copper (brass) ones are all the same. Don't know about the plastic ones.

The copper (brass) ones are being reproduced by someone.
 
Last edited:
jstrez5 said:
I just ordered the float from third Gen. thank you jim
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Jim, PLEASE hold that float under water (in a glass) over night. I have had a few new one's leak.
Much easier to solder prior to installing it and having it fill with fuel.
 
Kube is right on again. I had a problem with my fuel gage showing empty, when I knew the tank was full. This is what I found when I pulled the sender from the tank.
 

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I put a new gas tank on my 47 Ford Convertible Super Deluxe. It has baffles in it. I'm pretty sure In installed the float assembly in the new tank correctly. Question is: Do the baffles interfere with the float moving up and down? Also, the car has been converted to 12V neg grd. Will the gage be ruined by the higher voltage?
 
Old College Kid said:
the car has been converted to 12V neg grd. Will the gage be ruined by the higher voltage?
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The gauge can definitely be harmed by 12 volts. A voltage reducer should have been installed in the feed to the gauge as part of the conversion. The gauge will then be feeding the proper voltage to it's sender.
 
Old College Kid said:
I put a new gas tank on my 47 Ford Convertible Super Deluxe. It has baffles in it. I'm pretty sure In installed the float assembly in the new tank correctly. Question is: Do the baffles interfere with the float moving up and down? Also, the car has been converted to 12V neg grd. Will the gage be ruined by the higher voltage?
Click to expand...

It would be nice to have a little more information on where you are on your project. The combination of aftermarket tanks, King-Seeley Ford gauges, voltage changes, and resistance replacement sending units can be confusing.
 
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