JSF-TC

My Feedback: (2)

I was getting an increasing amount of air in my air trap and also noticed air bubbles in the line from the fuel tank to the trap during defuel, once the fuel level dropped below about 3/4 full.

I pulled the fuel clunk from the tank, suspecting the flexible fuel line, but as I started to dis-assemble it, I noticed that the brass tube in the line used where it passes through the tank baffle has a hairline crack in it - see attached.

Once that part of the fuel line became uncovered it was sufficient to allow air into the feed line to the air trap.

I replaced the brass line with a heavier gauge 3/16" tube and it all checks out fine.




Paul

Harley Condra

My Feedback: (4)

A more permanent fix is to replace the brass tubing with the same size stainless steel tubing.
The brass tubing is sometimes worn by the tank baffle during transportation by bouncing on the fiberglass baffle, which will actually cut through the brass tubing wall which will lead to air leaks....there was a "Hint and Tip regarding this problem the BVM website a few years go.
This is why BVM baffled tanks have contained stainless steel tubes for the last few years.

Ad Clark

My Feedback: (4)

What Harley said---+1 Absolutely go the stainless route when passing through a baffle