Having trouble installing the water pump tube

[MarBob]

can't seem to understand how the water pump tube seats in place - it keeps falling out

 

[MarBob]

MERC 9.9 2 stroke

 

[About Time]

Install the tube by itself up in the casing, use a little grease to hold it. Make the final connection when you pick up lower unit.
We had the same problem,Good Luck