Originally Posted by
JanisK
T9 for me was running really well with lots of speed and very stabile performance, how ever after some 7 liters (16%) of fuel, middle rpm needle started to leak badly. Of course this can be coincident, but another dude with similar engine usage time had the same problem.
Seems that orings on middle rpm needle have to be change every 5 liters at least.
Mine leaked only after 1 litre, resulting in poor and inconsistent idle.
The o-ring looked fine, I used teflon tape (plumbing tape) which instantly fixed the problem.