Hi I have a vx .18 engine but when it starts the high speed adjuster starts to turn on its own. I believe it is just the o'ring that is squashed so not holding the adjuster in its set position. Ive tried lots of places around the UK to get a spare o'ring so hoping somebody on here will know where I can get one, The size I need to find a spare one or somebody that has one they will sell me. I thought about putting ptfe on the thread but mot sure if that's a good idea or not.
Any help would be very much appreciated.
Thanks
Bill