1987 Mercury 6hp

[Madonk]

Ok, here's the deal:

I have a 1987 Mercury 6hp that I bought a year ago. I put it in the water the next day and it seemed like it was only running at half power. I checked my gps and it said I was running 6 mph. I pull off at a landing and it wont start back up. I put it up for 6 months because I had to go back to North Carolina. When I got back I attempted to clean the carburetor, but I know nothing beyond the basics of a 2 stroke. I noticed my fuel line was bad so I changed that and tried to clean out the carb again, but it still won't start.

Does anyone know what is going on with this?