amh447

I have 84 hrs on my 1200 fitch injected genesis. It blew the center piston. the dealer/mechanic fixed it for $3400. It lasted 2 hrs and blew again. He claims he put another $1600 in parts & labor in it. I used it for the first time sunday. It went good for 20 min then occasionally the red light would blink so we turned around,dropped off passengerate lunch. took off and in 15 min it started slowing down,we returned to dock as this is what it did twice before before blowing a piston.
The dealer says he never wants to see it again. He's known to be an excellent computer savy tech of 35 yrs.
Does anybody have a clue what's wrong whith this ?
Arnie