4 mm pump inlet, 6 mm tubing. Hmmmmm....I wonder how you do this.........

Q. What is the ID of 6 mm tubing?
A. 4 mm!

Without any further headscratching, here's how you hook 6 mm line to the 4 mm pump fitting.....

1. Slide a piece of 4 mm tubing over the pump inlet barbed fitting.
2. Using a sharp exacto or razor blade, cut the 4 mm tubing off FLUSH with the end of the barbed fitting.
3. Slide the 6mm tubing over the 4 mm tubing you just placed on the barbed pump inlet fitting.
4. Safety wire the 6 mm tubing to the pump inlet barbed fitting, to keep it from leaking.
The point of this exercise is to supply the pump with as much fuel as it can ever use. There is no reason or sense in reducing the available fuel to the pump by aa reduction of the supply line cross section. Let the pump work as easily as possible. Remember that the fuel supply is on the SUCTION side of the fuel system.
It's easier to drink through a regular straw than through a cocktail stirring thingie.

Harley Condra
BVM REP
JetCat REP