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I have been trying to understand why my 77 Panther 5000 engine has one cylinder much richer than the opposite side for a couple years and need some help from a 2-stroke genious. The rich side is the clutch PTO, and the fan side is way lean. Engine is single carbed Mikuni.
Here is what I've done so far..
Compression 120psi each side.
Swapped cylinders and swapped pistons from side to side, rebuilt lower crankcase twice with new seals each time, and added a new after market CDI. Ignition coil is also new. Upper end gasket kit replaced each time of rebuild.
Could the crankshaft be out of phase, or would there be something in the ignition that would allow greater spark at 180-degrees vs 360-deg? What else could make the engine so much leaner on one side vs the other?
PS: I hope this is the correct spot to put this thread.
Here is what I've done so far..
Compression 120psi each side.
Swapped cylinders and swapped pistons from side to side, rebuilt lower crankcase twice with new seals each time, and added a new after market CDI. Ignition coil is also new. Upper end gasket kit replaced each time of rebuild.
Could the crankshaft be out of phase, or would there be something in the ignition that would allow greater spark at 180-degrees vs 360-deg? What else could make the engine so much leaner on one side vs the other?
PS: I hope this is the correct spot to put this thread.