i purchaced a 40 size tower hobby trainer on e bay it had a os 40 la it ran like a clock but crashed it and lost motor so i bought a gms 47 abc bb with muffler to replace it and i cannot get it to iddle broke it in like direction said ran 4 tanks of fuel threw it the only way it will iddle good is if i keep the glow starter on it any tips would be appreciated thanks

Did you adjust the low end idle mixture? When you say it won't idle, how long is it before it dies? I don't think glow engines will run forever at idle, but you should be able to get 30-45 seconds out of it before it loads up.. I'd try leaning the low end needle 1/8 of a turn and see if that helps at all.. Probably too rich..

I just broke in a GMS .47. You have to slowly lean the LS needle till it will run with the glow driver off at idle. and only 1/8 turn at a time and don`t get your fingers in the prop ! Then go back and tweak the HS needle. This engine takes a little more time to get the settings right. But once set , will idle without any problems.
Make sure the carb is sealed to the crankcase , or you can set the needles all day long and get nowhere.
I`m not a big 2 stroke fan , but I like the way this low cost engine runs. High rpm`s and really good power , but , one of the tougher ones to tune .
If the engine dies when you pull the glow plug , you are to rich on the LS, or your glow plug is not lighting the last coil or 2.

what is a good point to start at with the high speed if i screw it in all the way how many turns out and with the with the low speed also thanks for the info was about to throw it in the bayou and buy me another os by the way what is the easiest to tune thats what ill start buying