Hi NormK I haven't worked on that many mowers mate only just a couple that I have here. The only thing I can mention is I don't know if it helps all that much but I think it's a good thing if using the standard red Victa needle to always turn the fuel tap off and let the engine run until it stops before putting it away. I don't sell mowers to customers so I don't know if you could possibly also tell them to always do this?
I have had a very good run for many years always doing this with my Victa Commando and when I drag it out of the shed even after 4 months or longer, I just put fresh fuel in and it eventually starts, sometimes it may take 3 or 4 pulls to start it after sitting so long. But once it starts it runs fine all day and I mow the lawns. Maybe I have been lucky I don't know. It just has all standard genuine Victa carby parts in it.
I have also put a standard red Victa needle in that red Victa Pace PT I repaired about 3 months ago. That's also been sitting for about 3 months now. The grass is starting to grow everywhere here now and once the weather starts to dry a bit I might take this out for a mow. I will see if it still runs ok after sitting so long. I do remember I also turned the fuel tap off on that one and let it idle until it stopped before I put it away.
Don't know mate I am just thinking maybe turning the fuel tap off and running the engine until it uses up the fuel in the carby to let the float drop a little bit and also it lets the needle rest and sit away from the seat may prevent it from sticking and then when you want to start it again it might work ok.
I know my green Victa FC usually runs ok after sitting for many months like this. I don't know about that other red Pace PT though. When I get around to starting it again I will see if it runs ok as it's been sitting for around 3 months now also. I just have a standard red Victa needle in it, but I have installed a genuine Victa primer cap and genuine Victa float and also a new genuine Victa jet. I don't know if there is much difference between the genuine and aftermarket carby parts.
Cheers!
Zip a dee doo dah, zip a dee ay, another trash picked Victa, hip hip Hooray!