I have a 1995 johnson 88 special with one broke ring, slightly dinged piston, and slightly scored cylinder wall. The mechanic says I'll pay half the money for a new motor for the repair and won't be guaranteed the repair will last very long. Not sure how many hours on the motor. Its used for 2 weeks of hard fishing and skiing a year and maybe 10 day trips of fishing. Bought it brand new. Any advice as to my best options. Rebuild piston? Install rebuilt power head. Buy new e-tech? Help please. The mechanic suggests the new motor.