Outboard motor

I was looking back at some previous posts and still have some questions.
I am looking at buying a 2.5 HP Mercury 15” shaft.
Is the shaft long enough?
I measured from top of where it will mount to the water line and it is about 15”
I see it weighs 38lbs which seems light.
What is best to get?
I am looking at buying a 2.5 HP Mercury 15” shaft.
Is the shaft long enough?
I measured from top of where it will mount to the water line and it is about 15”
I see it weighs 38lbs which seems light.
What is best to get?