Does anyone know the OHM's of the fuel sending unit on a 620 pickup?

[Suspect]

I'm just wondering if anyone knows the OHM range of a factory fuel sending unit for a 620 pickup?

[ggzilla]

12 ohms fully up

88 ohms fully down

35 ohms half full

 

The latter is the official spec.

[Suspect]

thanks!

[datzenmike]

I'm just wondering if anyone knows the OHM range of a factory fuel sending unit for a 620 pickup?

 

I have used a 720 tank in my 620 and the gauge reads just fine. The specs for the 720 sender is

 

Full, float fully up ...... 10 ohms

3/4............................... 25 ohms

1/2............................... 35 ohms

1/4............................... 56 ohms

Empty, float down..... 80 ohms

 

Give or take a few ohms this will work and agrees with ggzill very closely. The float arm length and direction will change depending on which car or truck model it's in but I think the senders are the same on all Datsuns. Getting an in tank sender safety certified would be horrendously expensive if you made new designs for every car model. I expect Nissan just uses one design.

[Suspect]

I'm trying to figure out something for my Mercury. The fuel cell in it was what I planed on using in my 620 and the gauge won't read correctly. I'm thinking about trying a datsun pickup sending unit in the fuel cell.

 

My 63 Mercury Empty is 73 ohms, and Full is 8-12 ohms

[Guest DatsuNoob]

just get the after market gauge that talks to that sender. I'm sure autometer makes an application specific to what you're after. I used a fuel cell with 0-90 ohm sender (chev) and 0-90 autometer gauge.

[metalmonkey47]

I believe i read somewhere that the 210 used the same level sender as the 620 and 510 with identical resistance. Can anyone confirm that?

[Guest DatsuNoob]

Here you go, this one will work if the sender is for a 63

http://cgi.ebay.com/ebaymotors/Autometer-Arctic-White-Fuel-Gauge-1316-Ford-Chry-_W0QQcmdZViewItemQQhashZitem45f6961ea6QQitemZ300489776806QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

[ggzilla]

Datsun 210? I can't confirm it because the FSM has no specs. But I'm sure they are the same as 510, 620, etc other 1970s Datsun based on various measurements.

[Goemon]

A 720 tank & sending unit will work on 78-79 frames.
The rear hanger bolt pattern is the same and the front pattern is the same

[datzenmike]

.... as long as it's reg cab to reg cab tanks or KC to KC. The KC 720  and 4 wd. tanks have a large notch to clear the undersides of the cab. The long wheelbase reg cab has the longest/largest tank and is without the notch so it won't fit under the long wheelbase KC.

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