This is all great stuff.
Mine does have a thru hull pickup and a Y pipe to the gimbal/lower unit for raw sea water pickup. I was confused by that, now it makes sense.
I bet my exhaust risers are not much above the deck, judging by the pics. the scum line on the boat is perhaps 4-5" below the scuppers, so fully loaded, I can see the waterline being close to the scuppers.
I do have a post 2002 engine, , and 0W0..... serial number- so with the dry joint, all the riser extension kits are >$400 that I can find. I looked at eBasic Power, Osco, Mercury... Unless I am dong something wrong?
The older extensions are 1/2-1/3 the price. If I need the expensive dry joint extensions, I need them. But it looks like a lot of $$$ for a few bolts, gaskets and lumps of cast iron. Plus, as you pointed out, the intermediate elbows.
I will take measurements and see how far off it is. Is there a known downside to more than 13" above waterline? Because the pricing for a 3" extension and 6" is about identical. So I might wind up with 15". I guess if 13" is the minimum, then a bit more is OK.
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