Thread: Fuel Gauge

What type and where do you get new fuel line to replace the "fuel gauge lines" that have turned so dark and unreadable? Please and thanks.

Roger H

And here's one for you Roger L - the "sky catcher" has a similar system but they have a "float ball" making it easier to read. Your thoughts and magic?

Roger,

I have been told that the site tube is "Polyurethane tubing 1/2" OD x 3/8" ID" and can be sourced pretty much anywhere. I am about to replace mine so will let you know if there are any problems.

Regards,

Dave

I bought some from FD over the phone. Maybe, I paid too much, but it was a small amount. WF

I called several tubing Mfg's and they all told me over time the tubing's will stain from the 91 oct. Avgas doesn't stain. The poly tubing works just fine and should get replaced when they start getting darkened or hard.

I used the poly tubing, works fine, Change it every wing inspection

I'd make sure and check it frequently and change it at every annual. That's an easy way for fuel to spill into the cockpit, and there's no shutoff at the tank.

Doug

Can anyone give me details of the substance used to seal the plate on which the fuel sight tubes are attached when the plates are removed for wing inspection.

Maybe I'll make up new plates and fit these mechanical gauges if possible.
http://www.aircraftspruce.com/catalo...fuel_gauge.php

Anything is better than sight tubes you can't read!

Hi

These are parts # KA7020009 and called ''rubber seal ring'' in the parts manual.

However, the one I have received are not rubber but a fiber gasket made by Elring

http://www.elring.de/pdf/0810_overview_werkstoff_en.pdf

they are 1 mm thick

Originally Posted by Waggles

Anything is better than sight tubes you can't read!

I keep a very bright LED flashlight (Duracell Daylight) in my plane specifically to view the fuel sight tubes. Hold it right next to the tube and it is easy to read in any conditions. I have my 696 set to remind me to 'switch tanks' every 30 minutes, prompting me to check both sight tubes with the flashlight, and make any necessary adjustments in rudder trim to move fuel from one tank to the other.

I've never burned as high as 6 gph on a trip, so I use that burn rate for flight planning purposes with an absolute minimum 6 gallon reserve (1-hour +). So, if I am carrying 24 gallons usable, I figure I can go 3 hours before refueling. At 30 gallons usable, I'll go 4-hours. I don't fly any legs longer than 4 hours for other reasons.

Using the clock and 30-minute sight tube checks keeps you out of trouble - well, fuel trouble.

The sealant used on the fuel bulkhead is called Hylomar "Racing Formula". It is blue in color and very sticky when in contact with air for a few minutes. You want the Racing formula quality. You can order it from several sources online. Use this product alos for sealing the leaks at the fuel fitting as it exits from the bulkhead. You do not even need to remove the bulkhead. Call me if anyone needs to know how and I'll explain over the phone.

http://www.hylomar-usa.com/_resource.../products.html


Good stuff. Do not put a ton of it on. Smear some on the gasket and the mating surface. Let it set overnight. Do not smear so much on it comes out everywhere when the bulkhead is tightened then fill with fuel right away. It can get into the fuel system as one of our fellow CT'ers found out. In this case a little is good a lot is not.