97 Volvo Penta 4.3GLPLKD(4110144649) with SX-C1(4112030094) Outdrive. Replaced starter and it started fine. then a week later, went to the lake . Ran fine all day. Got back to the dock stopped and After 1/2 hr wouldn't turn over. No noise at all, not even a click from the starter. Kept turning the key and after 5 try's it started. Took out the ignition(key switch). It tested fine. What should I try next? Any ideas?