This is the exact procedure my ‘90 Mariner Mag 2 needed. If I did exactly as you wrote she was purrrrrfect, if not, it was a crap shoot. I never let my dad start the boat cause he wouldn’t hold the key down long enough and he’d just let it crank over. Wait 15 min and start over...again perfect. Loved that boat/motor. It taught me how to drive and take care of a boat when I was in my early-mid teens.