I have purchased a Irvine 53 but after running it in I now have some trouble getting it to run perfect.
It can run OK for several minutes, responding perfect, but suddenly it stops throttle OK, it just wont go to full speed. I then have to adjust the fuel needle to give it some more fuel. Then it throttles to full speed again and I can then adjust the needle back to where I want it at full speed, now it runs perfect again ,but suddenly the throttling gets bad again.

Since the engine in periods runs OK I don't want to adjust the acceleration screw because I the will get other problems instead.

Anyone out there who have experienced the same problems or have any tips ?

PS. I hope you can understand my English, its difficult to get all technical words right....