can’t seem to tune engine properly. Engine will start. Idle fine. But when it is reving up and or wide open throttle is held for more than 2 seconds the engine shows signs of being to lean. Engine carb was reset to a very rich setting. So rich that if idleing fuel will drop out exhaust and engine will need to clear the crank dramatalicly before moving. Once the excess fuel is cleared the lean signs show and cause heating issues as well as burnt glow plugs.