Small Engine Troubleshooting Problems? Ask a Mechanic Now.
The best I can find is that it appears that your starter is a part number 33835
The gear is a 33844
The nut and retainer is 33433A
This is a rectangular starter used on many of the models like yours, but I cannot be 100% sure since your number does not com up exactly.
I hope this helps.
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thanks for advice