Fuel Gauge Float Leak Not As Solved As I Thought

 Gusty winds have kept me from flying, but I was at the airport earlier in the week to get something.  While I was there I tapped the top of the float wire to see how well it floated and it sunk to the bottom of the tank, bummer.  A couple hours later when I got home I weighed it and found it had taken on 10 grams of fuel, half it's normal weight.  Avgas has a density of about 0.72 grams/ml so 10 grams of gas is about 14ml.  Submerging the float on water I find the volume is about 50 ml.  So, 14 ml is well over 1/3 full of gas just from temperature cycles sucking it in while floating, barely under the surface, at the top of the tank.

A little dangerous experimenting with a cigarette lighter found the leak, in the side seam.  I drained the gas, fixed the hole, and left it submerged in gasoline for 5 days.  Two nights it went down to 25 Degrees F, so good cooling/warming cycles to draw in gasoline.  I weighed it this morning and it hadn't gained any weight.  Hopefully it's really fixed this time.  I'll put it back on the plane and keep checking how it floats.