On Wednesday, May 1, 2019 at 7:24:07 PM UTC-4, wrote:
On Wed, 1 May 2019 15:56:06 -0700 (PDT),
wrote:

I just got a old 5hp sea king and it's not locked up but I have no idea how to start it. Help plz!

Depending on how old it is at least 50:1 but some of the older ones
may have been 25:1
First be sure you have a healthy spark. That usually takes 2 people if
you don't have a spark tester. If it is sparking you can try just
filling it up and giving it a yank. If you are not sure you are
getting gas out of the carb, squirt some premix in the throat, open
the throttle all the way and yank it. You will start out too rich but
after a few pulls the mix will be OK enough to pop. If it runs a few
seconds and stops, suspect a carb problem or a fuel delivery problem.

They need three things to run... fuel, air, and spark. Greg's method will get you started.