wannabe

I have an 1984 Chris Cat with merc 400's and SSM II's. It takes a long time to get on plane - 3 blade cleaver props. Will 4 blades help? Don't know the current pitch- I will check that.

Thanks Wannabe

Dueclaws

What diameter prop are you running? 15"?
IMHO 4 blades may help; you'll be limited in diameter because of the #2 drive and might have trouble finding small diameter props.

Changing to a larger diameter 3 blade might help, but you'll need to cut-off the back part of the "anti-cavitation" plate for clearance. Even with the cut, I think you're limited to about 16" diameter.

Also note that the larger diameter & 4 blades will put extra stress on the drives and parts are hard to find.
Due

wannabe

OK, the planing issue was taken care of this summer. I experimented with the drive settings at launch. Previous owner told me to keep the drives at "0". I tried in October setting at "-2" and boom up on plane in 150 yds. OK, I am learning about this boat.

Wannabe

bbladesprops

You have 4" hubs, 4 blade props are non-existant for the 2 drive. There were diameters to 16.5" though. I can't remember how big you cn go with the diameter though.

wannabe

Brett, I will confirm if 4 inch or 6 inch propshaft length this weekend. I may have to go to used market for larger pitch if I repower.

Wannabe

CcanDo

Your boat presently has a 2" spacer in the drives to promote planing. Also, the props that were on it were 16x28 three blade, which is about right for the power you have. I would encourage installing a ballast tank in the cabin and removing the 2" spacer on the drives. This will help with planing, but also greatly improve top-end performance since the props are presently running partially submerged.

CcanDo

wannabe

CcAndo:

I was not aware you know so much about the boat. Thank you for the information!!! I will try and attach a picture of the outdrives. I also didn't know I have a spacer- interesting.

The boat planes fine now, I have tried fooling with the drive settings to launch and found the correct settings.

Wannabe

copiercat

i wnt round and round with similar questions and advice,the person that set me straight and was accurate was hydromotive propellors

wannabe

Here is the pic. had to resize.

copiercat

im running 5 blades and a 1" spacer and mine leaps out of the hole with good top end