Fuel Line Replacement...

Hi Michael,

My 200hr 912ULS uses Gates fuel hose, all to "barb" fittings, as did my last 912ULS, that was 950 hrs when I sold the aircraft. Its a perfectly legitimate way of attaching hoses and safe if done correctly.

If you are going down the "barb" track use only automotive style barbs, not the old multi barb type.

When selecting the hose size, get the correct OD hose for the ID of thefitting. The objective is for the hose to make a fuel tight seal, without the need for a clamp. The clamp is for security, not sealing a badly fitting hose.

In the above example, the OD is of the smooth pipe (not the bulge/barb). A correctly sized hose will fit snuggly to the pipe and have enough elasticity to go over the barb. 

Fitting can be made easier with a smear of silicon lubricant. 

Hose length should always be such that the hose  goes right up to the end of the fitting, without needing to be put under tension.

Hoses should be supported ie not place undue weight/movement on the fitting.

The clamp , located just to one side of the barb (bulge) only so tight as to prevent the hose slipping off the fitting.

The above style fitting (& many more) are available from most automotive parts supply stores, particularity those offering performance parts.😈

No shortage of banjo bolt sellers, just Google it.