In regards to your reply I stated that in item 9 I took the carb and reed valve and block off my other 60 engine including all gaskets and put them on this engine. The carb assembly from the non starting engine I reinstalled on the good engine and it works fine. The carb assembly from the good engine is on the non starting engine and it still won't prime. When you take the reed block off the engine and look on the inside of it you can see the hole for your carb pressure and it is fine. It can't be the carb assembly as I took a complete system off good running engine, The motor has good compression