Hi, New to these forum's (lots of great info!). Just picked up a 2000 bayliner ciera sunbridge 2455 with a 5.7L 260hp efi, Bravo lll drive with ss props. Is a low hour, well taken care of boat. Took it out for a solo ride Friday with no issues. Took the family out on Saturday (wife and my small children). Initially, I could not get the boat up on plane. It would plow up to about 14mph, then the rpm would quickly rev to more than 4000, with no increase in speed. Trim tabs were all the way down, outdrive was all the way down. Tried taking off slowly and just going full throttle from the get go. Nothing seemed to help. On about the 6th attempt it went up on plane, no problem and was good the rest of the day. Yesterday, had 2 more adults on the boat and the same problem. Tried moving passengers forward etc., with no benefit. Then, again on like the 6th attempt all was good. Had no trouble getting on plane the rest of the day. Hull is clean, props in good shape. Runs great ~ 32 mph at 3500 rpm, ~44mph at wot. We were running on a calm lake, boat was properly warmed up prior to attempting this. The algae was a bit thick. Any thoughts?