Help please. I am purchasing a 2006 cd 16 cruiser. It has a honda 40 hp 2006 with a 11 3/4 x 13 inch prop 3 blade. I went to finish the deal and the boat was not able to get up on plane. The boat got up to about 21-23 mph, but never leveled out. These items I have added to boat. It has a 5hp kicker(55lbs) , swim step, extra 3 gal fuel tank was 1/3 full. 2 six gallon fuel tanks were 1/3 full also. I have 2 batts which are under port seat. I also have a radar arch on boat ( its cool). Thats it. The boat was run on a nice day in estuary with two grown men in boat and nothing else.. Should this boat be able to plane while sitting in the standard seats. I am going to get a permatrim. Do you think a kicker is just too heavy on a 16 cruiser? Thanks Geoff