JD 310E Crank time when starting

Question is the jd seems to have a long crank time cold, maybe a few seconds shorter when warm. when it starts feels like its loaded up and or misses for a few 4-8 seconds.
Any thoughts?
2- new 1000-cca
1- new starter - el Cheapo - Did same crank time with factory starter, Changed out for grinding on teeth of flywheel
1- new fuel filter
2 newer air filter


JD 310E Crank time when starting