Stump Grinder Slant 6 Starter

Those old starters got slow when the bushings at each end wore, allowing the armature to actually physically drag on the outer field magnets, creating huge amp draw .
This got really bad when the engine was hot .
If it works, carefully take it apart and look at the armature, there should be witness marks on the armature.
Replace the bushes, - and the brushes if nec.
Should be good to go .