I changed my docking lights this season with the stock bulbs. Before you change them I would recommend ordering the retaining springs so you have them if needed. (3 on each side) I think they were around $2 each
I have a 2008 240 and the LOA is 26'. I believe they started counting the swim platform in 2009.
Before I purchased my boat I did a sea trial on both the 305 and 350 and I feel that the 305 is under powered for that boat.
I rebuilt the carb at the beginning of the 2014 and 2015 seasons then I sold it at the end of last year and got a 240 sundeck. You are doing the same thing as me with the fuel treatment but unfortunately all the gas near me have ethanol.
I had the same problem when I had a 2005 180 sp with the 3.0. I rebuilt the carb at the beginning of the season and the bog was gone for the rest of the season. Following season I had to the same problem so I had to rebuild the carb again. I think it is because of the ethanol in the gas. (And I...
I also have the garmin 54dv on my 2008 sundeck. It is probably in the same spot as bark615's. To the left of the compass. I have a pic where you can zoom in to see it but the file size is to big. If you want I can email it to you. I can also try to get a better pic over the weekend.