I've been a lurker for some time now, been doing a lot of reading. I am now to the point where I need to ask. 
Here's the background story to give you an understanding as to why I am asking such a stupid question. You can either read through the story, or skip to the bottom of my posting for a link to the image, should you so choose.
I traded a perfectly good 94 SeaDoo SPi for a 18' Boston Whaler clone with an 87 110 Evinrude that had sat since the middle of last season. Saving most of the drama getting it running, the engine was found to be very weak.
Took it to the shop, learned that one cylinder was at 80psi, while the other three were over 115psi. Upon teardown, learned that the wristpin had come loose, and tore up the ports and scored the cylinder wall. Too much to fix.
I picked up an 88 Special powerhead for a decent price, and brought it back to the shop. No biggie, they'd swap, and bolt right up...or so we thought. After moving everything over to the 88SPL, and getting ready to drop it onto the midsection, it is noticed that the gasket wont line up. I get the call, then make a few of my own. I show up and we compare notes. Sure enough, my blown head, and the 88 special do have the same pattern, but the midsection is different. The kicker is the transom sticker matches the serial of my blown head, so nobody really knows how it was ever bolted together or even ran properly in the first place. The guys at the shop confirm that my blown head and the replacement are both the very common mid 80s V4 crossflow, but they have no idea what the midsection is?
Can you identify WTH this midsection belongs to?
Underside of new powerhead (same pattern as the old) (500k jpeg)
Midsection View (800k jpeg)
Midsection, with correct powerhead gasket laid on top (875k jpeg)
Here's the background story to give you an understanding as to why I am asking such a stupid question. You can either read through the story, or skip to the bottom of my posting for a link to the image, should you so choose. I traded a perfectly good 94 SeaDoo SPi for a 18' Boston Whaler clone with an 87 110 Evinrude that had sat since the middle of last season. Saving most of the drama getting it running, the engine was found to be very weak.
Took it to the shop, learned that one cylinder was at 80psi, while the other three were over 115psi. Upon teardown, learned that the wristpin had come loose, and tore up the ports and scored the cylinder wall. Too much to fix.
I picked up an 88 Special powerhead for a decent price, and brought it back to the shop. No biggie, they'd swap, and bolt right up...or so we thought. After moving everything over to the 88SPL, and getting ready to drop it onto the midsection, it is noticed that the gasket wont line up. I get the call, then make a few of my own. I show up and we compare notes. Sure enough, my blown head, and the 88 special do have the same pattern, but the midsection is different. The kicker is the transom sticker matches the serial of my blown head, so nobody really knows how it was ever bolted together or even ran properly in the first place. The guys at the shop confirm that my blown head and the replacement are both the very common mid 80s V4 crossflow, but they have no idea what the midsection is?
Can you identify WTH this midsection belongs to?
Underside of new powerhead (same pattern as the old) (500k jpeg)
Midsection View (800k jpeg)
Midsection, with correct powerhead gasket laid on top (875k jpeg)
