[Oletrucks] 1950 3600 gas gauge

[Bill Hanlon]

Miq’s hints are valid, but it should top out at 30 ohms, not 90.

 

From: Oletrucks <oletrucks-bounces at autox.team.net> On Behalf Of MIQ MILLMAN
Sent: Saturday, October 18, 2025 5:23 PM
To: smokey <smokey at railops.com>
Cc: oletrucks <oletrucks at autox.team.net>
Subject: Re: [Oletrucks] 1950 3600 gas gauge

 

Simple possible solution:  poor grounding connection on the fuel sending unit, and the back of the instrument cluster.

 

slightly less simple:  check the contacts on the resistor board (which if stock is right there in the cabin fuel tank with you), and check the ohms on the unit by pulling it out and moving the float.  It should top out around 90 ohms.

 

Maybe just replace the fuel sending unit as a whole?  I can't imagine that it is more than $50.

 

  --Miq

 

 

 

On Sat, Oct 18, 2025 at 9:57 AM smokey <smokey at railops.com <mailto:smokey at railops.com> > wrote:

For 25 years my gas gauge has worked just fine.  Now the needle shakes all the time, whether the motor is running or not.  As long as the key is on.  Any thoughts?

 

Thanks!

Smokey Culver, League City, TX

 

 

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