Discussion Starter · #1 ·
Well i hit a road block with her. Not sure whats going on. Its runs fine at idle but when you throttle up it starts shaking like mad and acts likes it is misfiring and stumbles real bad. When it does this it will backfire through the carb and dies. I replaced points condenser coil keyswitch. Has me and my john deere mechanic friend puzzled. He thinks maybe the cam we switched (mine had bad loob on it) was a 14 hp cam instead of a 10,12,16 cam. Not sure what else it could be. Rebuilt the carb (set it to the book with float) also tried different carb same thing. Any suggestions guys? Motor had less then 5 hours run time on rebuild. We checked timing good there. Valves were set to specs. Also put new governor gear in it to. Any ideas would be great as this is very irritating to say the least. Never had a rebuilt motor do this. Has a aftermarket piston not a stens or kohler but i heard that not the problem. Block was honed to the piston. Crank was turned and polished to.