They won't swap the magneto side is different. 505's take a larger bosch flywheel, with 3 screws on the stator holding it down and 504's have the smaller flywheel and two screws on the stator.
They won't swap the magneto side is different. 505's take a larger bosch flywheel, with 3 screws on the stator holding it down and 504's have the smaller flywheel and two screws on the stator.
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