Just bought a used boat with a 70 Evinrude motor,well I cleaned the carbs and changed the plugs due to the fact that the boat had been sitting for 1 year,so I got it to fire up,well it runs good but when I put it in forward or reverse it dies.Even though I did get it to run 30mph once or twice . I thank you to those that have any info that you are willing to share.