I recently took my 30' Chris Cat out for the first lake test after spending all winter restoring the boat. I have twin gen 5 murcruiser 502's with ssm2 drives. As of now I am running 30x15.5 clever props. In order to plane the boat I have to blow the props out and hold the boat in the 5000 rpm range in order for the props to eventually hook and make the boat plane and take off. When they grab they grab. Is it normally with my set up to have to go through this to plane the boat? My fear is not only that it is hard on the engines but if I pack the boat full of people or run into a situation where im leaving in big swells that I may not be able to plane the boat at all?? This is the first time in 5+ years the boat has had the proper left and right hand drives. Previous owners were running with 2 left drives and 2 left props. Now that I am mechanically set where do I start with finding the ideal prop set up. The rh drive has already been cut for larger diameter props and it wouldn't take much to do the left if a larger diameter would help me. Looking for any sort of help, opinions, and advice as this is my first catamaran and time running this style of drives/props.

Im sorry, I currently am running 30x15.15 props not 27's

Pm is full. Gimme a call .....2526708851

Send props to get cupped.

I heard this hard to plane problem on those more than once! One local guy here had the same cant recall how it was solved... I remember he had a 1:1 ratio on trany, and.... On drives?

Call Timmy (CarolinaCopters) he has my old Chris cat and it planes great. The props are going to slip some at first but if everything is right it should get on plane in the 2800-3000 range. You prob have 3 blade cleavers some 4 will help also.

couple of good suggestions on the board, I had a similar problem with my 31 cat when I tested a set of props that had the diffuser ring cut off. I also tested another 31' cat that had a high X dimension...same problem happens.

where is prop shaft location in relation to the bottom? when I had 2's on my chris cat the props where 3/4" above the bottom, I ran 29 x 16.5 and 28 x 17 3 blades, my boat came on plane around 3 grand with tunnel tab down, it did take some time, normally the props would blow out once, I would pull back on sticks and then slowly advance throttle and she would plane. 4 blades solved the problem until I blew a drive, with 4 blades I did not have to trim the drives in at all, it would pop on plane with drives level and tunnel tab down .

I don't have any tabs on my boat, that was one of my dads suggestions but I didn't think they would be necessary with my set up. I have come to the conclusion that I am over pitched for my power and weight. "Correct me if im wrong". I have a guy trying to sell me a pair of 3 blade, 17x26's for a grand shipped. Is that a fair price? Does that sound like a good starting point? I am willing to loose some mph if it means not taking a quarter mile to plane out.

Also if anyone knows of a pair a 4 blades for sales I would appreciate it.