Help- A Leaky Victa Lawnmower

Greetings All from the UK

I bought my OZ victa in mid 1990s and shipped it back to the uK when I got posted here. It was still working till two weeks ago when I noticed a leak from the prima part (suction). So I ordered the part from OZ and bought the ring too and the needle. The so called needle is a small back plastic which I could not figure where it fits inside the prima. Can someone please help and send me instructions as to why I do have the leak. I just replaced the pipe from the fuel tank to the prima, put new blades , after a big struggle unlocking the massive bolt and still could not see why I have a leak?

Your comments are highly appreciated.

Si
[email protected]

ps; If I cannot fix it by this weekend I am to buy a honda HRG415SD self drive but 4 strokes. I really like my Victa but it may be time to send it to the junk yard:U

do you have pix of where its leaking ?