won't start

Hello, it sounds like the engine's battery is low in charge, and too low to provide any power. Start by testing the 12 volt battery for state of charge and then also the ability to handle a load. If it fails, replace it and recheck. As always, check for any corrosion build up on battery cables and ensure connections are secure. You're saying the "battery (is) good" -- you've had it professionally tested for state of charge and the ability to sustain a load? What "solenoid" did you replace, and what testing was performed verifying it was failed?

Choke it - pull rope couple times.