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First off,installed SBT engine after my nighmare runing fine.The reason I installed the new motor was,original motor was scarring the rear piston.Would like input on this problem incase it happens again,it kicked my butt. 
First off I started motifying original motor,F/A,primer kit,removed choke plates,carbon tech reeds,and rejeeted carbs one size up on low mid and high jets. I had Wisco pistons,PTO piston scarred three times this year.First time machine work was questioned,second and third time machine work was done in house.The clearances were set at 0.007,and checked it my self.Stilled scarred piston.Breakin was done with premix 32:1,for one full tank,never exceding 1/2 throttle.On second tank 40:1 after warming up engine died after running full throtle for about 15 seconds.Good by Mr. wisco.Does this sound like air leak,carb jetting problem,or etc..
I was wondering had anyone else had problems with wiscos.Thanks for the imput.
First off I started motifying original motor,F/A,primer kit,removed choke plates,carbon tech reeds,and rejeeted carbs one size up on low mid and high jets. I had Wisco pistons,PTO piston scarred three times this year.First time machine work was questioned,second and third time machine work was done in house.The clearances were set at 0.007,and checked it my self.Stilled scarred piston.Breakin was done with premix 32:1,for one full tank,never exceding 1/2 throttle.On second tank 40:1 after warming up engine died after running full throtle for about 15 seconds.Good by Mr. wisco.Does this sound like air leak,carb jetting problem,or etc..I was wondering had anyone else had problems with wiscos.Thanks for the imput.
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