I have developed a leak this year but tried several suggestions with no luck. Maybe 5 gallons a day gets in. Filled livewell and watched for hours. Nothing. Left boat strapped on trailer and backed down ramp until water was about ready to come over the back. Nothing. Looked at engine bolts, tie downs, thru hill fittings and valve. Dry as a bone. Just going to fish and see if it gets worse or I get lucky and see it.