It is indeed possible to reverse the ground polarity by simply swapping the battery cables and doing nothing else. The tractor will still start and run fine.
But if the generator is not re-polarized the battery will not be charged. Further it will likely burn out the voltage regulator – also possibly the generator. Nor will reversing ground polarity have any effect on the battery running down when the engine is shut down.
Swapping your W6 back to positive ground will have no effect on cranking speed. If that's a problem first be looking for bad (corroded) or undersized battery cables. (Cables should be at least 1/0 with SOLDERED terminals). If the cables are good then check the starter for worn brushes, bad commutator, dry bearings, etc. Also check and replace the starter switch if necessary.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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