tnx problem
hi guys just brought my boy a tnx and managed to break it for him before he got a go was trying to break the new engine in but having trouble keeping the engine going seemed to be reving up and down and had fuel coming out of the exchaust while it was runing then would just stall......then when i tryed to start it the electric starter was turning but not the engine...had a look and found the damper rubbers have disintregrated....i,m a complete newbie to these machines wot did i do wrong thanks in advance