Re: '71 Johnson 33hp
On your 33hp, the shift connector is behind the 'window' on the port side of the midsection held on by two screws. Take off that 'window' and completely remove one of the two bolts in the coupler. If that doesn't help, the driveshaft is likely stuck in the crankshaft. You'll have to drive wedges between the L/U and midsection to spring it free. If it's really stuck, the driveshaft will damage the water-pump housing and nothing else, so don't worry about forcing it.<br />To convert a longshaft 33hp to shortshaft, you must replace the driveshaft with one precisely 5" shorter, remove the 5" extension on the water tube (it pulls off, but may need some penetrating oil), and replace the shift-shaft on the lower unit with one 5" shorter. The driveshaft can be replaced without opening the lower unit - just remove the water pump and pull. But the shift shaft can't. <br />You may want to try cutting 5" off the existing one and grinding a new groove for the coupler bolt, but if that's beyond your skill then you will have to disassemble the lower unit. Fortunately, it's an easy L/U to work on but you'll need a manual and some new seals to do it. And it would be a good idea to replace all the seals in it while you had it apart.<br /><br />Good luck, and BTW - Model RXEL-16M is a '68.<br />PS - you do have the large bolt in the back in addition to the small ones out too right?