I have a murray with a Briggs & Stratton Engine. Have a new battery, new starter, and silonoid. When you turn the key, the engine turns a little bit and locks up. Take plug out and fuel pours out of engine. Turn key with no plug to get fuel out, put plug in will start. Once started, it will run and can turn off and restart as long as it is warm. Cold, the engine tries to turn but locks up. Can not for the life of me figure out why. Any solutions. Much appreciated

It sounds like your float valve in the carb is letting gas leak past it and through the carb into the motor when it's not running. It sounds like you need a good carb cleaning and a new float valve. Also make sure you have an inline gas filter to make sure no more dirt gets into the carb.