Tom,

There have been good suggestions here, I think the main one is to use
the "wide mouth sealer" for better success.

But subscribe to the yahoogroup: "FoodSaver". There are folks there
with all kind of tricks. Also there is a sort of FAQ with a lot of anwers.

Pete
pstryjew At att dot net

TOM KAN PA wrote:
> My food saver Tilia V835 will not seal Mason Jars. The jars are new, the lids
> are new. It draws a vacuum, the machine stops indicating it's sealed but the
> lid pops off with no effort.
> What could be causing this?
> It does create a vacuum in the cannisters that came with it.
>
>