Hi Norm,
Try a Tecumseh rubber seat and Tecumseh shortened alloy needle with a small hole drilled through the bottom of the needle
so you can tie fuse wire from the needle to the float.
One problem I see with this Victa carby is the float doesn't push the needle straight up it pushes on an angle so needles
could have a tendency to leak and as long as you stop the needle sticking closed you shouldn't have a problem.
All the problems with the caps you've had ,I think if I was getting those problems I would have gone back to using the G3
carby.
I think the 24 inch mowers are a little harder to start after sitting for a while ,the indirect crank blade plate weight seems
to make them spin over slower when starting.
Cheers
Max