As stated above motors just need compression
, spark and fuel to run.
You say it won’t start rather than it won’t turn over so I presume it’s cranking ok.
Don’t rush to pull carbs apart until you have positively confirmed which of these three is the issue.
I’d usually start by pulling the plugs setting them on the block so they can get an earth and getting someone to key the starter. In bright sunlight you may struggle to see the spark, so do in the shade. You mention solenoid and starter so I guess larger motor which at 71 would have solid state ignition.
Then if you have a spark and if you have the tool run a compression test. You are looking for compressions all within 10psi.
Assuming you have a spark and compression then check fuel. Electric
start 71 Evinrudes are likely to be multi carb motors so a no start (rather than a misfire) is likely to be upstream from carb. Is the choke operating? Is the primer bulb pumping up hard? Can you hear the float chambers filling as you prime alternatively can you push fuel through and out the carb bowl drain screws with the primer bulb?
When you post back please include details of motor .