My 1984 johnson 90hp outboard will start when I get it to the lake and run like it's new all day as long as I don't turn it off. Once I turn it off it will take any where from 30 minutes to and hour before it will re-start. the motor will crank til the battery dies but won't fire. When it does start back up it runs great again. Do you have any ideas? Thank you in advance.