Anyone's FYI,.....I have a pair of USED Stellings extension boxes for sale....with IMCO's HEAVY DUTY inner tramsom plates if anyone here is interested. Buy the extesion boxes for $2500 each and I will include the IMCO Heavy Duty inner transom plates with the deal.

WOW Cord, nice to see on here again. How have you been???

I wouldn't bother to try and modify the stock inner plate. There is just no the plate can be modified with out butchering it. I ended up using the Stellings inner plate, but I wasn't able to clamp it as tight as I needed to keep the box from slipping. Maybe the IMCO plate will allow you to really crank on the bolts.

Things have been better. Sold the house last summer but got beat out (repeatedly) on it's replacement. Faced with a housing gap we were forced to accept an offer and we moved back in with my mother-inlaw. We finally bought a house and were moving forward with it's closing when I got laid off. The market is so crappy that I'll be off for at least 6 months. You know that you've hit bottom when living with your mother-inlaw isn't so bad.

Sorry to hear that Cord. Hopefully things turn around for you soon.

As far as the box slipping, if I remember right, you made all 3 holes on your box into one elongated slot. That may have had something to do with it.

I have the Merc inner transom plates on mine.

http://www.stellingsmarineproducts.com/home/

Any photo's or drawing of this?

This is the direction I want to go, I have heard the shaft is around $550??

Anything else that should be replaced on the box with it being used before the install?

Crimmonies, it's been so long that I just don't remember. I remember having a custom spacer plate machined, but I'm certain that it had drilled holes. I'm pretty sure that it's the box that came slotted. Fairly certain I didn't have any machine work done on the box.

Now I remember! Stellings offered the boxes in both forms. I believe they started with a slot, but went to drilled holes later on... I think....

Well, you'll be forced to use external steering. You can use the IMCO arms and rams. Just be certain the arms are centered on the drive shaft or things will bind. I don't know what you have for a water pickup, but that'll need to be configured too. Originally I found aeration problems, even with a low water pickup so I went to a transom pickup. Problem solved. I'm not familiar with the driveshaft they're speaking of (used the Stellings shaft), but you'll proably be keeping the Stellings carrier bearing. What ever you do, don't disturb that bearing. Mine was removed when I got the box and it's a real btch to realign it. If I remember correctly, I ended up shipping the box back to Stellings so they could realign it.

I recall IMCO telling me that you want to come up one inch for every four inches of set back.

Yep, but Stellings will tell you that they have an inch of rise built into their box, so that rule of thumb doesn't apply.

The question that Everett and Stellings wasnt sure of was:
If you go to the IMCO or Everett straight shaft, what hole should the Stellings box be in? The middle hole or all the way down (top hole)???