My 1993 25hp Enenrude strats and runs perfect 99% of the time. But about every hr or two of running time it will dramatically miss , as if truning the motor on and off as fast as possible. It will happen when hot or cold, and at any speed over idle . When returned to idle all seems fine, try to abvance speed, the miss ,bad enough to shake the boat starts again. Through trial and error I've found that by turning the motor off ,waiting say 5 sec and restarting, motor is good to go, for another hr maybe two. Thanks for any help
