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Bravo XR change to ?
- Thread starter PARADOX
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DiamondPerformance
New member
IMCO SCX has been out for over a year with good results. You will need to change your helmet also.
2112
Founding Member / Contributor
Good luck getting the 4 little .250" bolts off the gimbal ring that hold the hinge pin cover on without them breaking off in your hand like little cardboard sticks.:ack2:
Merc doesn't Loctite those or Grease them and the stainless fuses to the aluminum very quickly.
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MERPerformance
Sponsor
Try alittle heat on the bolts, heat the alum. not the bolt, then back them out easy. I have found Loctite on the bolts that I have removed in the past. When installing; I always apply a tiny amount.
2112
Founding Member / Contributor
I did heat heat it up. Usually you can see a little loctite leak out when you do, Nothing here.
I was also disappointed how easy the bolts broke. 3 inch long box end, in my fingers and snap! they broke. Bolt # 5 in the picture BTW
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Airpacker
New member
According to Imco, the SCX is as strong as the SCT and in some testing, actually gave better results. No need to rerig the transom. Change the helmut, bolt on the drive and go.
So a SCT is not a direct replacement for an XR but with a transmission.
imco offshore
Competitor / Charter Member
Peter, if you do change,,, just bolt on the IMCO SCX and be done with it ,,,it,s 50% bigger gears and a lot stronger than the xr,s,,,, bolt on go have fun,,
Would the upper bolt up to an XR extension box. Does the trans have to be in the box or can it be on the engine?
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MattBMiller
New member
Can it be fitted into my existing IMCO extension box?
2112
Founding Member / Contributor
Airpacker
New member
Yes, it the SCT ( transmission required) uses the same over size helmut that the SCX ( shiftable) uses so that part would need to be swapped to mount either drive to the XR gimbel ring. I imagine the trans could be anywhere.
I have been pounding my SCX with a 900 hp blower motor and so far, so good.
It shifts like it has a trans. By that I mean its smooth as silk which surprised me.
I wanted to go the SCX route because I did not want the extra weight of a transmission nor the wwwwork involved in movint the engine forward ( Blower crank pulley clears bulkhead by 3/8" ) to accom a tranny in the boat. I didn't want to run an extension box on my daytona either because they seem work better with the drive on the transom.
Before buying the drive, I looked at B max and even thought about an Arneson but a single prop surface drive on a single cat would have been a handful no doubt.
I used to run a black hawk and that, although fast was twitchy at speed.
With e 400 extra hp I aded to the boat, the BH would have poofed real quick so I ended up with the SCX upper mated to a shortie SC lower.
My Daytona loved Merc upper gear sets. About every 15 to 20 hrs it ate them.
Never had lower issues so I think I am safe with the leaner lower unit. The big SCX lower may have had some high speed handling issues ( stern lift ) over 100 mph so I chose the SCX / SC hybrid version.
Airpacker
New member
If you mean the transmission, I have no idea whatsoever.
Dude! Sweet!
Charter Member
I've heard a lot of good stuff about the X Power drives. They're spendy, but they don't break (from what I hear). They will also help you find other weak points in your drivetrain... :cheers2:
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