My buddy has a 2000 42' cig Tiger. He changed out his bravo drives for xr drives with speedmaster lowers and is running a 5 blade hydramotive prop. He lost like 5 mph with the new drives. The new drives had 2" spacers in them so we took them out today thinking that it would get his speed back and tried it. It gained 200 rpm and shoots a 10' rooster tail now but didnt gain any mph. I think it runs alot better now and it doesnt porpis anymore. My question is what to do to get the mph back ? Are the drives to high is that why its shooting a rooster tail now ? Does it need a 6 blade would that help ? Do we need to put some more spacer back in ? should we have added more spacer instead of taking it out ?

I'm surprised it gets on plane with the shorties. We tried those on a friends 2000 Tiger and could not get the boat up.
As for 6 blades? trial and error.

Most guys find that the sportmaster skeg is too long.
Its longer than its predecessors and adds drag.

some guys cut it back-which is scary....how far do you cut?

Or you can buy an Imco lower and regain what you lost.


Uncle Dave

Oh- I forgot to add, I actually own both lowers

The imco lower is faster than the sport-master by at least 2 mph on my boats.

The imco lower is neither faster nor slower than my older Bravo 1 lower though.



Uncle Dave

It was really tuff for him he really had to ezz into it otherwise he would blow out.

As far as i know the sportmaster lowers are stock but you are right they are really long. I will let him no about the imco lowers.

Thanks guys anymore info much appreciated !!!!

I have a 2000 tiger as well, shorties wont work on it, i have xrs w 4 blades and I was told by some very knowledgeable people that the drive on a tiger needs to be deeper, i was told to put mine down a half inch, i just haven't had the time, depending on your power and setup. im at 625 and top speed so far has been 76.4..74 all day long

I have a fresh set of std XR lowers, im looking to get some shorties, if he is looking to go with std XR lowers, I would be willing to make a deal! PM me if interested

Also get rid of the 5 blades as they are stern raising and use 4 blades, also turning them in makes the boat carry better.