Now I know why some people pressure their tanks in a new installation. I set up the tanks in a new PST Reaction, and after maidening the jet I noticed it was wet from dripped fuel on the trailer floor. Checked all the fillings which were safety wired and could find no leaks or problems. So i said to myself, it must be an isolated problem and discounted it. A few days later I was doing some maintenance on the jet and had it upside down on the stand and saw some fuel drip on the floor through the canopy release spring.
Ok...says I to myself. I've got fuel dripping when it is right side up and now discovered fuel dripping when its upside down.
Disconnect the feed and overflow lines and removed the tanks which were glued together with Goop. I discovered that jet A fuel dripping around the tank takes the P off of Goop and changes it to Goo.
After pressurizing the tanks in a bucket of water, I discovered a pin hole on the top and the bottom of the main tank.
Now the question is...what is the best way to repair and seal these pin holes?
I also learned that I can save myself a lot of grief by testing every new tank under pressure for leaks before I install them

If its only a pin hole than a little hysol should do the trick.

If its only a pin hole than a little hysol should do the trick.

Is the tank fibreglass?

I had a similar problem with a BVM Sabre tank, a pin hole in the top of the tank which I
only discovered because I placed it upside down with the tank half full to fix the undercarriage.

Remove the tank & clean thouroughly around the pin hole with emery cloth & thinners.

Heat the tank gently with a heat gun or stand it in hot water (not where you are going to repair).

Remove the heat, quickly seal the tank lines & drip some CA on to the pin hole, as the air in the
tank cools it creates some suction which will draw the CA into the pin hole.

Clean the area again around the pin hole with thinners & put a dab of Hysol (BVM Aeropoxy) over the hole.


Worked fine for me. - John.