I managed to put them in however i know have another problem

once the new piston and rings were in, the motor started after about 10 pulls on the cord and ran for a while until the head gasket blew (new gasket).. I replaced the gasket again tried to start it but it really takes about 10 pulls to start, although once it does it runs really well and it obviously has good compression.
Hot/warm start is really good, but if i leave overnight it takes agaes to start again.. could it be fueling issues?