fuel line question

[pink aar]

I bought some 5/16 fuel line from a vendor ( rubber KV stamp). When applying the clamp it is still loose. Is their anyone else that has had this problem??

[303 Mopar]

I use worm clamps and make sure it is positioned over the metal piece you are clamping to, otherwise it will leak.

[screamindriver]

The correct installation tool will keep the center crimp from bulging up like your pic...Making a tight,concentric seal in the process..Here's a pic of a properly crimped keystone clamp note the flat crimp..Don't feel bad everyone has tried using whatever pliers they have laying around to get it done..Some get lucky and some don't....

[73440]

https://m.youtube.com/watch?v=T83W2QrYGbM

Is there a slightly smaller clamp size that will help ?
Location of the clamp to the inside of the serration is important seems .

[GoodysGotaCuda]

I bought some 5/16 fuel line from a vendor ( rubber KV stamp). When applying the clamp it is still loose. Is their anyone else that has had this problem??

looks like an improper crimp tool to me, start there. I prefer the style that keeps the top of the flange flat.