Hi you can probably try the easier things first then get on the harder things like checking/changing the bottom seal etc.

It's not hard to get the carby off these things and give them a quick check, clean, rebuild and put them back on again, there is a rubber seal on the carby neck you never know you might also have a leak from there and that's easy to change when the carby is off.

Just try the easier things first to see if it makes any difference.

Can you still adjust the revs to fast and slow speed with the throttle control lever?

Some years ago I did come here for an issue on my mower where the idle speed was too fast on my older full crank Victa with the G4 carby, I got some great help here and added a few brass washers in the carby and it fixed my fast idle issue. I also did change the top and bottom seals on my full crank engine but I don't think they were leaking and causing the fast idle problem but I changed them anyway, but when I added the 2 brass washers in the carby it fixed the fast idle problem perfectly. I can post you a link to the thread but as I said I am not sure if it's exactly the issue you may be having as this was for a full crank with a G4 carby and a faster than normal idle speed. Not a powertorque with a LM carby.

Here's a link to the old thread:

https://www.outdoorking-forum.com.au/forum/u...cta-2-stroke-idle-problem.html#Post28278

I hope this helps.

Cheers!

Zip a dee doo dah, zip a dee ay, another trash picked Victa, hip hip Hooray!