Evolution 52NX Engine
New engine has not run good from the start - have about 3/4 gallon fuel through it - wants to run very lean - Start up if fine - first throttle up to warm up and test must progress very slow - at 1/2 throttle sounds like it is loaded up and takes several seconds to throttle up same with 1/2 to fu ll throttle - have tried fox plug osA3 os8 and now using K and B idle bar plug - k and B plug is the only plug that the engine will run rich - same issue with other plugs only you have to run much leaner - Flies ok but if you idle back it loads up again and will take several seconds to throttle up - have replaced manufacturers fuel tubing checked back plate and cover all screws appear to be tight
Any suggestions would be greatly appreciated, I would rather get this thing running than have to send it in. Thanks in advance.