Fuel systems leak detection

Today, hot sunny day, bike tire tubes in the two 3" conduits. There is a smell of gas. I ran the meter, 402ppm.



I need to move air the other direction.

This was the reading at the fuel sender access hatch with the lid set over the probe. 2254 ppm

A friend of mine said the lines are not as good as people think and his lines go through a lifevest locker and he has same amount of stink.

But I aim to do some fixing of the issues. I am going to install an intake for the helm exhaust that is creating neg pressure behind the console. And I am going to install some venting for the fuel lockers and probably consider using duct seal at the access to the lockers where the fuel supply lines and sender lines exit. This might drive up the ppm; so needs to be after some venting is done.

very grateful for all the contributions to this thread...hoping it helps others

 

Update.

well, my lines are A2, not A1-15, so I need to cut the decks open and redo the lines.



Coast Guard approved and best are not the same...