No. Here is a link to Honda web site that gives a step by step of how to change the water pump. Pay close attention to the shift shaft connection
I'm going from the parts manual that I found online for this motor. Main Nozzle and Main Jet #70, labeled in the manual, come from
turns out they gave me the wrong seal,ordered one from Nissan,hope its right this time
From reported year, it should be 2-cycle. There was a recent thread on THT dealing with this topic:
Does the oil in the lower unit need to be drained when replacing the water pump impeller? there is a drain and a oil level screws on the lower unit.