Does how a person operate a outboard shorten the life of the motor ? An aquantance of mine has a 1994 Evinrude 200. Every time he takes off he punches it close w/o to get to plane out then pulls throttle back. Also when we are running 1/4 throttle he will push close to wide open then pull back to 1/4 repedially. Does this shorten the life of a motor ? thanks