Ok, so the one on the right is copper washers.
I did already try snug both these up and that did nothing on the pipe fitting and may have made the one on the left, what I have been called a cap nut, a little worse.
My questions is CAN I TAKE off the cap nut?
Is there anything like a spring or whatever that I
should watch out for or not touch at all.
Thing is I am in the middle of digging foundation for garage and can not afford to have TLB down right now.
TLB seems a little under powered. If it is not getting full fuel pressure or sucking air that would explain the slight lack of power.