I winterized my boat last week and left the antifreeze in the system and put it down for the winter. I've been noticing accumulation of the antifreeze in the bilge (1-2 inches) that I have been syphoning from there every 3 days or so. I just replaced the water pump this summer and have noticed water in the bilge throughout the season but didn't think anything of it, but now I think there is a leak somewhere in the engine/connection to outdrive. Any suggestions on where to start and narrow down where it is coming from? The boat is a 1999 Galaxie 1800 DB with a 4.3L mercruiser I/O Alpha 1 outdrive and is trailered.