Hi all,

I have an old Victa Mustang, I believe with the V40 engine, that's over revving.

I did the typical test and changes with seals, etc, but couldn't figure out what was going on.

I thought it might have something to do with vacuum, so I connected an extended hose to the diaphragm cap. When sucking I did feel pressure building up, and the top of the cap pulling down, so I'm happy there. I then connected the hose to the chassis port and confirmed, no blockages.

I then tried running the mower with that extended hose connected to the diaphragm cap and sucked while the mower was running... the revs dropped. I thought maybe the neutral spring in there was too much for it, swapped it for a Red spring.. no change. I shortened the length of hose between the cap and chassis, no change.

The only things I can think of are something to do with the 2nd spring in the carby, or something to do with the flywheel not creating enough vacuum?

Any ideas or thoughts are appreciated smile

Cheers in advance,

Paul