Was starting fine all day, never a problem. Then attempted to start and it sounded as if the starter was hanging up or bendix was not strong enough to turn flywheel. After 3rd attempt w/ WOT it started. Ran fine, stopped and turned off motor with key. Tried to start again and this time, the bendix would hardly engage. On 2nd attempt, nothing at all; no noise from starter or anything. Tried a few more times nothing. Swapped batteries, still nothing. Cut some anchor line and wrapped around flywheel and started up on the first pull. So where should I look first? Batteries are good. Thanks in advance.