OK FIGURED IT OUT. thanks for suggestions. for future reference, the lock pin was missing on the 'far end' of the release lever and so the lock shaft had retreated out of alignment, aligned it, replaced the missing lock pin, unlocks easily.
to remove my 2750 snowblower from my BX25 i have
1: removed shoot swivel arm
2: removed drive shaft
3: disconnected short drive shaft from blower to power transfer
4: removed lock pin on top of black triangular connection plate
but when i move the lever towards the BX to disconnect the...
you are correct, yellow and white are the outside connectors (up and down). all i need to do now is put the chains on and the snow can come (not as cold out west as you have had it)
purchased a used bx25 and 2750 snowblower, i would like to verify the color coding on the hyrdolic lines, there are colored zip-ties on the lines, one white and one yellow. no colored caps so i thought i better check. thx in advance