http://boatspecs.iboats.com/Elgin__35hp … 35br2250hy
Shows:
571-5944
571-5945L
571-5982
571-5983L
571-5990
571-5991L
I’d guess the "L" means long shaft.
Looking at the individual pages: The first two are recoil start, the rest are reported as electric start.
(all of them have "power steering"!!).
Another source confirms the long shaft, and
says 82 & 83 have electric start and 6 amp generator
and 90/91 have electric start and 20 amp generator