wouldnt arnesons solve all your guys problems and save you money and time?

I switched to the SCX uppers last year. Did helmet change and reservoirs kept my Merc Shortie lowers. Had to custom build steering plates to match up to my hydraulic steering rams. I'm running Merc 600 SCI's and used to eat XR's for lunch. Made it through entire season with no drive issues. "Priceless"!!

Ran my boat today with new scx4 drive.Worked out earlier issue with IMCO,boat ran level and strong.running whippeled 525efi ,5 blade merc clever.Too cold to get any top speed numbers,but very happy with it so far.Going to have to wait till spring for final set up,cant wait till spring!!!!!!

congrats on your new drive. Keep us updated and we love pics also!

Very Nice! Yours is a single engine ? What was the issue with IMCO? I put an SCX on my single 29' and am VERY happy with it after first season.

Yes single engine,but I am running SCX4 completely different drive.At first prop was blowing out,the cure was just adding torque tab to the skeg for single application.This drive is basically a surface drive.

Great glad you got yours straightened out. Are they that different ? I know the cases are different. But I thought most of the internals are the same.

Yes gears are the same,but it is 4" shorter and can run a larger diameter prop,I also have a 6 drive prop shaft.

Best band for the buck I would say imco SCX4.Reason I went with it over say nxt or 6 drive was no transmission which translates to less weight and maintenance,and can still handle I believe over 1600 hp,and use up to 17"Dia prop. JMO

Scx4 can NOT handle 1600hp and IMCO implies NO warranty. I thought the advertised HP rating was around 800-900. I personally believe that they will handle more then 850 but as the power goes up the life expectancy goes down. For example 850 HP will last let's say 300 hours (which is great) but 1200hp might only last 100 hours. No different then a XR behind a 496 vs a 600.

Congrats on the new drive and looking forward to hearing more on how your setup runs.

42 Fountain non-step hull ,side by side SCX lower -2 with Bmax upper , would you guys suggest SCX4 or stay with SCX

If you going to keep your lower and go w new uppers then my thoughts are that its all about your prop shaft height. If you go with normal scx then youll be at the same spot. If you go with -4 your going to be higher(obviously). Where are you now in relation to the bottom of your boat? Another thought is you can always go lower w spacers. I dont know how high guys are running w similar boats but I think thats what it is all about. what kind of propos do you wnat to run? cleavers vs bravo style?

As an fyi I just did a full scx conversion on my side by side outerlimits from Bmax. I was lucky and my steering worked with only slight modifications to my tie bar and my couplers had to be milled down. I didnt do -4 tho.

Why did you have to mill the couplers?

They were thicker on my b max than imco. Hard to describe w words. On the back cap of the imco the distance between the two ears was shorter than on my b max. I literally had less than $100 in machine work done and all bolted up wonderfully

Now I'm with you, the tie bar coupler.

Ran mine to 100mph still more to go, a little more fine tuning[ATTACH=CONFIG]524403[/ATTACH]

Anyone have scx4's on a 38 straight bottom cig that worked well?