Re: Who knows anything about Corsa Captains Call installation?
If you really want to pursue it, and you, (or a friend) are quite handy with tools, they can be easily fabricated in a basement or garage for a fraction of those prices. (I've done a few)
Here's some tips;
Remove the exhaust elbow(s) from the engine. Clamp a piece of 1x6 to each end of the elbow faces, so the the 2 pcs of 1x6 touch each other. Glue & screw the pcs together, add a brace for rigidity.
Now you have a fit jig to work from. Get some 3" stainless tube, cut a piece 6" longer than the elbow, clamp it to the riser end of the jig. Now measure perpendicularely from the Y pipe end of the jig to the center of the 1st piece of tube, that's the length needed for the down pipe. The upper end of this piece needs to be cut to fit the round surface of the 1st piece. Use stiff paper to make a template, then mark the pipe with it. When it fits, tape the 2 pcs together, remove from jig, reach into 2nd pc and mark the hole with a marker. Cut the hole, tig weld the seam.
Still with me?
Now cut 2 round discs a bit bigger than 3", then make it oval so that the smaller dimension will fit inside the tube. Cut 2 pcs ?" ss rod, 5" long, mill it half flat for 3" starting ?" from 1 end. The rod & disk will be the butterfly valve to open/close the thru-hull pipes. Weld 2 bushings on, add a solenoid or air cylinder to activate it.
Now fit it in place with the original hose couplings & clamps, eye up an extension of the horizontal tube, drill a pilot hole for the tips. I made them from the same 3" ss tube, just tig welded a flange on to bolt to transom. 1 more rubber coupling & clamps, done!
You can just see them in this pic, when i did my OMC to Merc conversion;
