I had the motor tuned and de-carbed after replacing the stator and timer base myself. My first time out I notced a slight tap and an intermitent squeak like something was coming loose. Check everything found nothing loose. Went out next day stalled out when powered down in marina would not start. If I open throttle up full it will start for 5 seconds then quit. Have good spark to all plugs, primer bulb goes soft but can pump it up hard. This is a v6 vro model j225txced. Compression was 75psi on all cylinders.Think it might have a bad seal or gasket somewhere any information would be great... Please advise...