IMCO Extreme SC Upgrade Project.
 

I started to install my new IMCO Extreme SC Drives on my 98 Powerquest today. I started by inspecting the units all looked fine but one lower unit I decided to send back to IMCO. It seems to be under a bind when turining the prop and upper shaft CCW. if you turn it CW it rotates fine. A wierd problem??. The other I assembled the lower onto the upper and replaced the rear cover with the existing latham rear cover to accommodate my steering.

The only mod I have to make is to cut off the flange at the bottom of the existing bell housing to provide clearance for the cooling tube that is routed down to the lower unit. Then mount as usual. I will post other pictures and procedures as I get them done.

Looks real good - can't wait to get mine. Only I didn't get mine polished because I didn't want to draw that much attention to the drives.

Wow - problems on one out of 2? Kinda making me scared - mine's due in within a couple weeks. :rolleyes:

You say the gimbal ring has got to be mod'd in order to fit the drive on?

Kook,

Yeh I was a little shocked too but better safe than sorry.

The cut you make is to the bellhousing itself (shaded area in red) You remove the bottom most flange on the bell housing not the gimble ring

Forgot to post pict:

Update
 

I pulled my gimble bearing and seals on the transom assembly. One was shot for sure the other seemed fine but I will replace it anyhow. I sure am glad I bought the proper tool from merc for pulling the bearings, They were quite hard to get out I really had to crank to get them out. I also have the bearing insert tool to put them back in.

One thing I did'nt expect to see was the bearing sets at an angle in the carrier. At first I thought they bent when they were pulled but after checking out the new ones I seen they were angled too.

I have had more concerns about the new IMCO SC Drives. I dont want to bash the factory as they have been very acommodating so far. If you are interested in the problems I have seen let me know and I will E-Mail you.

The problems you are having - are they related to the complete imco drive or just the lower? I am getting just the 2" shorter lower and using my internal parts.

Tinkerboater - You have Mail

New SC Drives
 

How are your new drives? I have a set coming any day for a new 31 AO. Hope I made the right choice.

I also am expecting my pair by noon Wed.
I ordered the 2" shorties with the 1 1/4 shafts in the 1.348:1 ratio with polished lowers.
I would like e-mail also if still available.
Thanks Mark.