As far as replacing the pull starter, DO NOT TRY TO REPAIR IT. (THE SPRING WILL TEST YOUR PATIENCE). Replace the whole assembly. It is usually cheap ($15), and only a few screws to play with. When removing the bad starter, notice the position of the one way bearing, as it must be replaced the same way. The engine does have to be removed, however. Use blue locktite when putting the screws back in, so vibration will not loosen them.

Once you get your engine properly tuned, try this trick when starting: Adjust the throttle (increase) the minimum setting on the TRANSMITTER (not the throttle linkage) about 20 percent above idle. Pullstart the engine. When the engine starts it will run at higher than normal RPM. Now reduce the setting to the original idle position. Works great. Good Luck!.