[Healeys] Gas Gauge

[rrengineer.mike]

For 10 years my Bugeye fuel gauge either read full or empty with no reason. For 10 years I used a 1/4" dowel marked off in gallons to "dip" the tank.  Not much of a hardship, it just got a few stares at the gas station.  All that changed when I bought a new fuel gauge that was supposedly a better version than the junk of the past. I found it on Ebay.  They were right.   It reads reasonably accurate, but I still carry the dip stick.Mike MacLean


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-------- Original message --------
From: Chris Dimmock <austin.healey at gmail.com> 
Date: 2/7/2016  5:46 PM  (GMT-08:00) 
To: Reinhart Rosner <reinhart.rosner at aon.at> 
Cc: healeys at autox.team.net 
Subject: Re: [Healeys] Gas Gauge 

Hi Reinhart,
No, if your gauge reads normally, except it never reads below 1/4 of a tank, then it's usually because the sender is the wrong way around. The float needs to sit in the matching valley in the tank. The measuring point on the float is the Centre on a vertical plane. If the bottom of the float sits on the flat bottom of the tank, then the gauge can't ever read less than 1/4, even if the tank is empty, because the Centre line of the float is 1/2 inch or so from the bottom of the tank. 
The bottom of the float needs to sit below the tank floor (I.e. In the valley) in order for the Centre line of the float (on the vertical plane) to be level with the bottom of tank, and read empty on the gauge. 
Usually, if all else reads correctly, but it never reads below 1/4, it's because the sender is around the wrong way, and the sender float isn't sitting in the valley. 
Can't help explain why yours reads empty when it's full, but full when it's 3/4. 
Best
Chris

Sent from my iPhone

> On 8 Feb 2016, at 9:55 AM, Reinhart Rosner <reinhart.rosner at aon.at> wrote:
> 
> Chris,
> In my BN1 the gauge reads empty when completely full. When it reads full, I
> know that the tank is 3/4 full. And when it reads 1/4 full, I know that it’s
> about getting empty. More or less I learned to live with that.
> 
> As you tell us this only happens, because the sender is installed 180 deg.
> out?
> 
> Is there any way to tell from above without having to open the sealing
> around the sender, if it is mounted in the wrong direction? 
> 
> Reinhart
> 
> 
> 
> Reinhart Rosner
> 55 100 BN 1
> Vienna – Austria
> 
> -----Ursprüngliche Nachricht-----
> Von: Healeys [mailto:healeys-bounces at autox.team.net] Im Auftrag von Chris
> Dimmock
> Gesendet: Sonntag, 07. Februar 2016 14:05
> An: Charlie Schott
> Cc: Steve B. Gerow; healeys at autox.team.net
> Betreff: Re: [Healeys] Gas Gauge
> 
> Charlie,
> Your sender unit is installed 180 degrees out. 
> Don't rely on the top of the sender unit for direction. 
> The float needs to sit inside the tank 'valley'. 
> I.e the float needs to face the front of the car, not the back. 
> Try it. 
> Best
> Chris
> 
> 
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