I have a 29' Larson with a stepped hull and twin 4.3gl VP sx
outdrives. I have a significant ventilation problem when in 2-3 seas
or more. I have been working with Larson to fix this problem and from
my research stepped hulls seems to have a tendency to have this
problem. I have sanded the aft section of the hull smooth to minimize
turbulance and now need to change props. I am running 14 1/4 x 23 OMC
vipers and am looking to move to 14 3/4 x 21 to get some more blade in
the water. From what I have read I need and prop with a high rake and
cupping and am looking at the viper or mercury mirage plus. I am
concerned about the mirage due to some things I have read, does anyone
have any expirience with this prop? I am also wondering about 4 blade
props, they seem to be designed for just my type of problem (holding
power, high mounted drives, medium speed cruising), but don't know
anything about them. Any advice on these or other types of props you
think would work well for me is very appreciated. I lost most of last
season due to this and want to get it right this year. For info I run
@ 4600 with a clean bottom with my current props.

Thanks,
Rich