2 weeks in a row, i have starting issue on my port side motor. starting at the dock, fine no problem but after few drift or fishing didn't start right away a few times. checked few things and give a few prime ball than start. once started no problem plane, cruising or wot, only to re-start. compared prime ball port and starboard, i can't feel or tell the difference, but it start with pump prime ball. should i just change prime ball or could it be more extensive attention is needed?