I heard piston slap noise when service this ski and now due to replace pistons.
This GP1200 needs replace piston every 100hr.
This customer requested me a rebuild so I dismantled motor.
Removed Exhaust pipe and Cylinder head
Ex side of cylinder
In take side of cylinder
In take side piston
Ex side piston
Amazing! all pistons are damaged as engine was still run and all cylinder had good compression because piston rings are not damaged. If this customer keep use more with this conditon may occur to more damaged such as piston will be broken pieces and then broken crank shaft and crank case. It is so lucky to find problem before big damage.
