Have you checked to see if the compression release is working correctly?
You might also want to check to see if the static timing is correct.
http://mgonitzke.net16.net/tools/static_timing.pdf
Is the S/G belt tight?
__________________
DWayne
1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck
10" moldboard plow
2016 XT1 42" deck 18HP
|