I know the gas gauge is an "approximate" level of fuel in the tank.
My '65 can read 1/4 tank, but only take about 4 gallons of fuel when it should take about 10 gallons at 1/4 reading.

My question is, how does one adjust the sending unit float to get a closer reading?

Thanks,
Murphy

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Bend the rod. Adjust the float so that it's farther down and that way the gauge won't read is low at that level of fuel

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You do have the correct ohm sending unit for LM (not EM) right?

Kevin
Medina, OH

Thanks Matt.

Kevin, Yes it is the correct unit.

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Last one I installed I split the difference in float travel from high to low and it reads like yours. I need to bend it closer to the bottom.

Joel
Northlake, TX
5 Ultravans, 145 Corvairs and counting...

Does it ever show full???

J.O.

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Once I had made my sending unit, with new float and everything, I set it next to the tank and bent it so it would read empty when it hit the bottom, and the top when reading full.

When it hits Empty, I have about 4 liters. When I fill it completely, I need to burn off about 4 liters for it to go down to Full.

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Mine reads empty and full. Full is full but empty is about 1/2 tank.
The rod isn't long enough to make the float go from top to bottom.
Are you talking a '60 Richard? I know nothing about them except the sender is different.
I have a tank that has the side cut out so I need to hook it to a gauge and adjust for best function. I used it to eyeball the adjustment but I obviously need to connect a gauge. One issue that makes it difficult to visualize is at the bottom the rod is almost horizontal but at the top it is almost vertical so a lot of fuel difference doesn't move the float much.

Joel
Northlake, TX
5 Ultravans, 145 Corvairs and counting...

jjohnsonjo Wrote:
-------------------------------------------------------
> Does it ever show full???


If this is directed to me, yes it does read full on a fill-up.

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

richard1 Wrote:
-------------------------------------------------------

>
> When it hits Empty, I have about 4 liters. When I fill it completely, I need to burn off about 4 liters for it to go down to Full.


I agree, that sounds like most fuel gauges. Gauge on my 65 pulls away from full pretty quickly.

65 Monza Coupe
61 500 Coupe-W100181
Earliest '61 Alive?

Quote
Are you talking a '60 Richard? I know nothing about them except the sender is different.

Top sender is a 56 Chevy sending unit I bought, bottom is the original 60 unit.



Here is the final cut, bent, adjusted 56 Chevy unit modified to work correctly in the 60 tank.


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This is what my 65 is showing on the gauge with a completely empty tank. So if I pull the sending unit out of the tank will I want to bend the float rod up just a bit or down just a bit, to try getting the gauge needle closer to the empty mark?

Corvair at post office 2 - 1.png

yes. You want the lever with the resister at the end of its travel when the arm can no longer move.

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David Payton Wrote:
-------------------------------------------------------
> This is what my 65 is showing on the gauge with a completely empty tank. So if I pull the sending unit out of the tank will I want to bend the float rod up just a bit or down just a bit, to try getting the gauge needle closer to the empty mark?

Down.....more than a lil bit. About 1/2" off the bottom.

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I think I have a gas tank in my scrap pile once the snow melts. I should cut it open to view senders like Joel has.

Jim Brandberg
Isanti, MN
CorvairRepair.com

A word to everyone about new senders. It seems that unlike the factory units, the present reproductions aren't adjusted and all need adjustment. There is a way to adjust them that requires an electronic meter, but I don't remember what the procedure was that my electronics friend told me to do. If I find it, I'll post it.

-Mark

It sounds like the float is on the wall side of the rod, instead of the other side. It may be hitting the wall, where it can't go all the way down.

Al
Georgia

What is the wall side. The front of the hand or the rear of the tank?

Dennis
Nashville area

Look at the first photo Richard1 posted. The lower sender is correct with the float long section to right of rod. If it is to left of rod, it will hit walk and not give you an empty reading. Known issue and discussed here numerous times. You can find it by searching.

Al
Georgia

Just to add meaningless trivia to the thread:

Mine shows full right to the top, but if I'm figuring correctly, I still have a 1/4 tank on empty. Pretty much I love it.

ECP