127 129 parts interchange
 

Is the engine and drive train the same? I have a 129 and a 127 came up for sale at a good price. I know the frame and mule drive are different.

Powertrain is the same, although the 129 may have a ported pump, and the 127 would not.

Hydro's and rear ends very, very seldom fail.

driveshaft is different in the size dept.

The shielding isn't the same. I mistakenly bought a muffler shield from a 147 for my 149.

Not sure what all parts you need, but I know at least the heat shielding around the top isn't the same.

Kohler changed the location of the spark plug in the head during the 1x8/9 series. If he changs the engine as an assembly, it won't be an issue. Or, you can just swap heads and tins. It's a very minor issue.