I removed the ones I had on my Bravos over the winter when I painted the drives. The reason I took them off is because I put them on myself and wasn't sure if I had them on right. I just had new HP gimble rings done 2 yrs ago and there is a slight bit of play now, so I thought if those cones are not straight they may cause damage.

Since I took them off I've lost 300 rpm and about 5 mph. I had Hardin Marine cones but would like to if there are better ones.

What is involved in doing a new lower case? I may have to have the drives gone through anyway. Is this worth looking into?



Thanks

Hmmmmmmm, nobody knows about nose cones??

Not sure of the Bob's fit Bravos but that is what I am running on my 300s and they are great. I got the dual hose kit for more flow. I gained a couple mph...

http://www.bobsmachine.com/

Hydromotive makes a good unit. On my first boat, an 85' Formula 242 with twin small blocks, I picked up 3 mph and they were easy to install.
www.hydromotive.com

#6's work.