lol, my one-way bearing in my rustys pro.15 engine always would slipp. so i found a solution[X(]before you run you truck take the glow-plug out an flip the truck ove let it sit like that for about 10 secs then while the truck is slip flipped over start pulling the pull start for about 5 secs like you would trying to start it. then just flip it back over put the plug in prime it and have fun. i have been doing this for 3 months know and i havent cleaned my one-way bearing till yesterday cuz i was tightening the spring